Heliocentrism

<h2 id="ancient-and-medieval-astronomy">Ancient and medieval astronomy</h2>
While the <a href="/facts/Sphericity_of_the_Earth/YEpM38jY">sphericity of the Earth</a> was widely recognized in <a href="/facts/Ancient_Greek_astronomy/ehwqftGz">Greco-Roman astronomy</a> from at least the 4th century BC,<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a> the Earth's <a href="/facts/Earth%2527s_rotation/mDbXcKUx">daily rotation</a> and <a href="/facts/Earth%2527s_orbit/BGGCdFag">yearly orbit around the Sun</a> was never universally accepted until the <a href="/facts/Copernican_Revolution/cthYYtBg">Copernican Revolution</a>.
While a moving Earth was proposed at least from the 4th century BC in <a href="/facts/Pythagoreanism/25BjMN2z">Pythagoreanism</a>, and a fully developed heliocentric model was developed by <a href="/facts/Aristarchus_of_Samos/cyfJR02u">Aristarchus of Samos</a> in the 3rd century BC, these ideas were not successful in replacing the view of a static spherical Earth, and from the 2nd century AD the predominant model, which would be inherited by medieval astronomy, was the <a href="/facts/Ptolemaic_system/yIc6na3w">geocentric model</a> described in <a href="/facts/Ptolemy/htudGQTQ">Ptolemy</a>'s <a href="/facts/Almagest/30qaBRAq">Almagest</a>.

The Ptolemaic system was a sophisticated astronomical system that managed to calculate the positions for the planets to a fair degree of accuracy.<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a> Ptolemy himself, in his Almagest, says that any model for describing the motions of the planets is merely a <a href="/facts/Mathematics/pxTouaz4">mathematical</a> device, and since there is no actual way to know which is true, the simplest model that gets the right numbers should be used.<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a> However, he rejected the idea of a <a href="/facts/Earth_rotation/mDbXcKUx">spinning Earth</a> as absurd as he believed it would create huge winds. Within his <a href="/facts/Ptolemy/htudGQTQ">model</a> the distances of the <a href="/facts/Moon/zKHqEMPb">Moon</a>, <a href="/facts/Sun/CadPCVHh">Sun</a>, <a href="/facts/Planet/rbPjE6Bx">planets</a> and <a href="/facts/Star/euBFuo07">stars</a> could be determined by treating orbits' <a href="/facts/Celestial_spheres/tgnFQ19F">celestial spheres</a> as contiguous realities, which gave the stars' distance as less than 20 <a href="/facts/Astronomical_Units/gjsbu5xU">Astronomical Units</a>,<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> a regression, since <a href="/facts/Aristarchus_of_Samos/cyfJR02u">Aristarchus of Samos</a>'s heliocentric scheme had centuries earlier necessarily placed the stars at least two orders of magnitude more distant.
Problems with Ptolemy's system were well recognized in <a href="/facts/History_of_astronomy/js3QcRnX">medieval astronomy</a>, and an increasing effort to criticize and improve it in the late medieval period eventually led to the <a href="/facts/Copernican_heliocentrism/0PpeLDRA">Copernican heliocentrism</a> developed in <a href="/facts/History_of_astronomy/js3QcRnX">Renaissance astronomy</a>.

<h3>Classical antiquity</h3>
See also: <a href="/facts/Ancient_Greek_astronomy/ehwqftGz">Ancient Greek astronomy</a>
<h4>Pythagoreans</h4>
The first non-geocentric model of the <a href="/facts/Universe/lfoqc5m6">universe</a> was proposed by the <a href="/facts/Pythagoreans/25BjMN2z">Pythagorean</a> philosopher <a href="/facts/Philolaus/xVosbQjq">Philolaus</a> (d. 390 BC), who taught that at the center of the universe was a "central fire", around which the <a href="/facts/Earth/HLLmDfj0">Earth</a>, <a href="/facts/Sun/CadPCVHh">Sun</a>, <a href="/facts/Moon/zKHqEMPb">Moon</a> and <a href="/facts/Planet/rbPjE6Bx">planets</a> revolved in <a href="/facts/Uniform_circular_motion/r4YaTspL">uniform circular motion</a>. This system postulated the existence of a <a href="/facts/Counter-Earth/A4QRsdlQ">Counter-Earth</a> <a href="/facts/Collinearity/SxbVBJYR">collinear</a> with the Earth and central fire, with the same period of revolution around the central fire as the Earth. The Sun revolved around the central fire once a year, and the stars were stationary. The Earth maintained the same hidden face towards the central fire, rendering both it and the "Counter-Earth" invisible from Earth. The Pythagorean concept of uniform circular motion remained unchallenged for approximately the next 2000 years, and it was to the Pythagoreans that Copernicus referred to show that the notion of a moving Earth was neither new nor revolutionary.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a> Kepler gave an alternative explanation of the Pythagoreans' "central fire" as the Sun, "as most sects purposely hid[e] their teachings".<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>
<a href="/facts/Heraclides_Ponticus/edDyDjrM">Heraclides of Pontus</a> (4th century BC) said that the <a href="/facts/Earth%2527s_rotation/mDbXcKUx">rotation of the Earth</a> explained the apparent daily motion of the celestial sphere. It used to be thought that he believed <a href="/facts/Mercury_(planet)/lVa1GIyX">Mercury</a> and <a href="/facts/Venus/pADnueP6">Venus</a> to revolve around the Sun, which in turn (along with the other planets) revolves around the Earth.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> <a href="/facts/Macrobius/f11D3xkT">Macrobius</a> (AD 395—423) later described this as the "Egyptian System," stating that "it did not escape the skill of the <a href="/facts/Egyptians/kBkt6yV8">Egyptians</a>," though there is no other evidence it was known in <a href="/facts/Ancient_Egypt/BDsEGK4g">ancient Egypt</a>.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a><a class="footnote-ref" id="fnref:13" href="#fn:13">13</a>

<h4>Aristarchus of Samos</h4>

The first person known to have proposed a heliocentric system was <a href="/facts/Aristarchus_of_Samos/cyfJR02u">Aristarchus of Samos</a> (c. 270 BC). Like his contemporary <a href="/facts/Eratosthenes/ay7Pyfsa">Eratosthenes</a>, Aristarchus calculated the size of the Earth and measured the <a href="/facts/On_the_Sizes_and_Distances_(Aristarchus)/0Dgj8lUl">sizes and distances of the Sun and Moon</a>. From his estimates, he concluded that the Sun was six to seven times wider than the Earth, and thought that the larger object would have the most attractive force.
His writings on the heliocentric system are lost, but some information about them is known from a brief description by his contemporary, <a href="/facts/Archimedes/sIeMhSVF">Archimedes</a>, and from scattered references by later writers. Archimedes' description of Aristarchus' theory is given in the former's book, <a href="/facts/The_Sand_Reckoner/2Aurb9fg">The Sand Reckoner</a>. The entire description comprises just three sentences, which <a href="/facts/Thomas_Little_Heath/E9xE228u">Thomas Heath</a> translates as follows:<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a>

<blockquote>You [King Gelon] are aware that "universe" is the name given by most astronomers to the sphere, the centre of which is the centre of the earth, while its radius is equal to the straight line between the centre of the sun and the centre of the earth. This is the common account (τά γραφόμενα), as you have heard from astronomers. But Aristarchus brought out a book consisting of certain hypotheses, wherein it appears, as a consequence of the assumptions made, that the universe is many times greater than the "universe" just mentioned. His hypotheses are that the fixed stars and the sun remain unmoved, that the earth revolves about the sun on the circumference of a circle, the sun lying in the middle of the orbit, and that the sphere of the fixed stars, situated about the same centre as the sun, is so great that the circle in which he supposes the earth to revolve bears such a proportion to the distance of the fixed stars as the centre of the sphere bears to its surface.— The Sand Reckoner (Arenarius I, 4–7)<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a></blockquote>
<a href="/facts/Aristarchus_of_Samos/cyfJR02u">Aristarchus</a> presumably took the stars to be very far away because he was aware that their <a href="/facts/Parallax/Gu8W21LP">parallax</a><a class="footnote-ref" id="fnref:16" href="#fn:16">16</a> would otherwise be observed over the course of a year. The stars are in fact so far away that stellar parallax only became detectable when sufficiently powerful <a href="/facts/Telescope/BDwYahhR">telescopes</a> had been developed in the <a href="/facts/1838_in_science/rynCmVy0">1830s</a>.
No references to Aristarchus' heliocentrism are known in any other writings from before the <a href="/facts/Common_era/e5DpqUoe">common era</a>. The earliest of the handful of other ancient references occur in two passages from the writings of <a href="/facts/Plutarch/p3bywktN">Plutarch</a>. These mention one detail not stated explicitly in Archimedes' account<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a>—namely, that Aristarchus' theory had the Earth rotating on an axis. The first of these reference occurs in Concerning the Face Which Appears in the Orb of the Moon:<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a>

<blockquote>Only do not, my good fellow, enter an action against me for impiety in the style of <a href="/facts/Cleanthes/J7dg9K1U">Cleanthes</a>, who thought it was the duty of Greeks to indict Aristarchus of Samos on the charge of impiety for putting in motion the Hearth of the Universe, this being the effect of his attempt to save the phenomena by supposing the heaven to remain at rest and the earth to revolve in an oblique circle, while it rotates, at the same time, about its own axis.— Concerning the Face Which Appears in the Orb of the Moon (De facie in orbe lunae, c. 6, pp. 922 F – 923 A.)</blockquote>
Only scattered fragments of <a href="/facts/Cleanthes/J7dg9K1U">Cleanthes'</a> writings have survived in quotations by other writers, but in <a href="/facts/Lives_and_Opinions_of_Eminent_Philosophers/loz5JI5p">Lives and Opinions of Eminent Philosophers</a>, <a href="/facts/Diogenes_La%25C3%25ABrtius/u99P8c1J">Diogenes Laërtius</a> lists A reply to Aristarchus (Πρὸς Ἀρίσταρχον) as one of Cleanthes' works,<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a> and some scholars<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a> have suggested that this might have been where Cleanthes had accused Aristarchus of <a href="/facts/Impiety/58TPRst2">impiety</a>.
The second of the references by Plutarch is in his Platonic Questions:<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a>

<blockquote>Did Plato put the earth in motion, as he did the sun, the moon, and the five planets, which he called the instruments of time on account of their turnings, and was it necessary to conceive that the earth "which is globed about the axis stretched from pole to pole through the whole universe" was not represented as being held together and at rest, but as turning and revolving (στρεφομένην καὶ ἀνειλουμένην), as Aristarchus and <a href="/facts/Seleucus_of_Seleucia/CXapv7HJ">Seleucus</a> afterwards maintained that it did, the former stating this as only a hypothesis (ὑποτιθέμενος μόνον), the latter as a definite opinion (καὶ ἀποφαινόμενος)?— Platonic Questions (Platonicae Quaestiones viii. I, 1006 C)</blockquote>
The remaining references to Aristarchus' heliocentrism are extremely brief, and provide no more information beyond what can be gleaned from those already cited. Ones which mention Aristarchus explicitly by name occur in <a href="/facts/Aetius_(philosopher)/fp5L1y2W">Aëtius</a>' Opinions of the Philosophers, <a href="/facts/Sextus_Empiricus/snjnkgIF">Sextus Empiricus</a>' Against the Mathematicians,<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a> and an anonymous scholiast to Aristotle.<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a> Another passage in Aëtius' Opinions of the Philosophers reports that Seleucus the astronomer had affirmed the Earth's motion, but does not mention Aristarchus.<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>

<h4>Seleucus of Seleucia</h4>
Main article: <a href="/facts/Seleucus_of_Seleucia/CXapv7HJ">Seleucus of Seleucia</a>
Since <a href="/facts/Plutarch/p3bywktN">Plutarch</a> mentions the "followers of Aristarchus" in passing, it is likely that there were other astronomers in the <a href="/facts/Classical_Greece/WoUfexFx">Classical period</a> who also espoused heliocentrism, but whose work was lost.<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a> The only other astronomer from antiquity known by name who is known to have supported Aristarchus' heliocentric model was Seleucus of Seleucia (b. 190 BC), a <a href="/facts/Hellenistic_civilization/q6BgQsaF">Hellenistic</a> astronomer who flourished a century after Aristarchus in the <a href="/facts/Seleucid_Empire/NSYMLBYa">Seleucid Empire</a>.<a class="footnote-ref" id="fnref:26" href="#fn:26">26</a> Seleucus was a proponent of the heliocentric system of Aristarchus.<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a> Seleucus may have proved the heliocentric theory by determining the constants of a <a href="/facts/Geometry/wTQf5ffQ">geometric</a> model for the heliocentric theory and developing methods to compute planetary positions using this model. He may have used early <a href="/facts/Trigonometry/K4hfaC6F">trigonometric</a> methods that were available in his time, as he was a contemporary of <a href="/facts/Hipparchus/pHld5PfE">Hipparchus</a>.<a class="footnote-ref" id="fnref:28" href="#fn:28">28</a> A fragment of a work by Seleucus has survived in Arabic translation, which was referred to by <a href="/facts/Abu_Bakr_al-Razi/PC32Rzes">Rhazes</a> (b. 865).<a class="footnote-ref" id="fnref:29" href="#fn:29">29</a>
Alternatively, his explanation may have involved the phenomenon of <a href="/facts/Tide/zNstvWPv">tides</a>,<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a> which he supposedly theorized to be caused by the attraction to the Moon and by the revolution of the Earth around the Earth and Moon's <a href="/facts/Barycenter/Fw9renao">center of mass</a>.

<h4>Late antiquity</h4>
There were occasional speculations about heliocentrism in Europe before Copernicus. In <a href="/facts/Carthage/MXGPRNFA">Roman Carthage</a>, the <a href="/facts/Pagan/JaWTHBtJ">pagan</a> <a href="/facts/Martianus_Capella/zQk4eMed">Martianus Capella</a> (5th century AD) expressed the opinion that the planets Venus and Mercury did not go about the Earth but instead circled the Sun.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a> Capella's model was discussed in the <a href="/facts/Early_Middle_Ages/9FrTq3rt">Early Middle Ages</a> by various anonymous 9th-century commentators<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a> and Copernicus mentions him as an influence on his own work.<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a> Also <a href="/facts/Macrobius/f11D3xkT">Macrobius</a> (420 CE) described a heliocentric model.<a class="footnote-ref" id="fnref:34" href="#fn:34">34</a>

<h3>Ancient India</h3>
See also: <a href="/facts/Indian_astronomy/q9pgvuCm">Indian astronomy</a>
<a href="/facts/Aryabhata/3L1j5TDm">Aryabhata</a> (476–550), in his <a href="/facts/Magnum_opus/IcvyMqQl">magnum opus</a> <a href="/facts/Aryabhatiya/cFsSkukD">Aryabhatiya</a> (499), propounded a planetary model in which the Earth was taken to be <a href="/facts/Earth%2527s_rotation/mDbXcKUx">spinning on its axis</a> and the periods of the planets were given with respect to the Sun.<a class="footnote-ref" id="fnref:35" href="#fn:35">35</a><a class="footnote-ref" id="fnref:36" href="#fn:36">36</a> His immediate commentators, such as <a href="/facts/Lalla/6Tv35IV2">Lalla</a>, and other later authors, rejected his innovative view about the turning Earth.<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a> It has been argued that Aryabhatta's calculations were based on an underlying heliocentric model, in which the planets orbit the Sun,<a class="footnote-ref" id="fnref:38" href="#fn:38">38</a><a class="footnote-ref" id="fnref:39" href="#fn:39">39</a> although this has also been rebutted.<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a> The general consensus is that a synodic anomaly (depending on the position of the Sun) does not imply a physically heliocentric orbit (such corrections being also present in late Babylonian astronomical texts), and that Aryabhata's system was not explicitly heliocentric.<a class="footnote-ref" id="fnref:41" href="#fn:41">41</a> He also made many astronomical calculations, such as the times of the <a href="/facts/Solar_eclipse/2XsCFG1a">solar</a> and <a href="/facts/Lunar_eclipse/cGSjtf1A">lunar</a> <a href="/facts/Eclipse/zXeAKwyj">eclipses</a>, and the instantaneous motion of the Moon.<a class="footnote-ref" id="fnref:42" href="#fn:42">42</a> Early followers of Aryabhata's model included <a href="/facts/Varahamihira/zgAxCKuR">Varahamihira</a>, <a href="/facts/Brahmagupta/f7uxKXo4">Brahmagupta</a>, and <a href="/facts/Bhaskara_II/BQlUY9gA">Bhaskara II</a>.

<h3>Medieval Islamic world</h3>
See also: <a href="/facts/Astronomy_in_medieval_Islam/hw8HxDHz">Astronomy in medieval Islam</a> and <a href="/facts/Islamic_cosmology/0mcDIIhK">Islamic cosmology</a>
For a time, <a href="/facts/List_of_Muslim_astronomers/hw8HxDHz">Muslim astronomers</a> accepted the <a href="/facts/Ptolemaic_model/yIc6na3w">Ptolemaic system</a> and the geocentric model, which were used by <a href="/facts/Al-Battani/mzsBlt1T">al-Battani</a> to show that the distance between the Sun and the Earth varies.<a class="footnote-ref" id="fnref:43" href="#fn:43">43</a><a class="footnote-ref" id="fnref:44" href="#fn:44">44</a> In the 10th century, <a href="/facts/Al-Sijzi/dYAvH2px">al-Sijzi</a> accepted that the <a href="/facts/Earth%2527s_rotation/mDbXcKUx">Earth rotates around its axis</a>.<a class="footnote-ref" id="fnref:45" href="#fn:45">45</a><a class="footnote-ref" id="fnref:46" href="#fn:46">46</a> According to later astronomer <a href="/facts/Al-Biruni/4XbTzrYl">al-Biruni</a>, al-Sijzi invented an <a href="/facts/Astrolabe/BctVIEm4">astrolabe</a> called al-zūraqī based on a belief held by some of his contemporaries that the apparent motion of the stars was due to the Earth's movement, and not that of the <a href="/facts/Firmament/KebqxguJ">firmament</a>.<a class="footnote-ref" id="fnref:47" href="#fn:47">47</a><a class="footnote-ref" id="fnref:48" href="#fn:48">48</a> Islamic astronomers began to criticize the Ptolemaic model, including <a href="/facts/Ibn_al-Haytham/Q5H9hm4J">Ibn al-Haytham</a> in his Al-Shukūk 'alā Baṭalamiyūs ("Doubts Concerning Ptolemy", c. 1028),<a class="footnote-ref" id="fnref:49" href="#fn:49">49</a><a class="footnote-ref" id="fnref:50" href="#fn:50">50</a> who found contradictions in Ptolemy's model, but al-Haytham remained committed to a geocentric model.<a class="footnote-ref" id="fnref:51" href="#fn:51">51</a>

Al-Biruni discussed the possibility of whether the Earth rotated about its own axis and orbited the Sun, but in his Masudic Canon (1031),<a class="footnote-ref" id="fnref:52" href="#fn:52">52</a> he expressed his faith in a geocentric and stationary Earth.<a class="footnote-ref" id="fnref:53" href="#fn:53">53</a> He was aware that if the Earth rotated on its axis, it would be consistent with his astronomical observations,<a class="footnote-ref" id="fnref:54" href="#fn:54">54</a> but considered it a problem of <a href="/facts/Natural_philosophy/CUAsDWdk">natural philosophy</a> rather than one of mathematics.<a class="footnote-ref" id="fnref:55" href="#fn:55">55</a><a class="footnote-ref" id="fnref:56" href="#fn:56">56</a>
In the 12th century, non-heliocentric alternatives to the Ptolemaic system were developed by some Islamic astronomers, such as <a href="/facts/Nur_ad-Din_al-Bitruji/IK3BXzqQ">Nur ad-Din al-Bitruji</a>, who considered the Ptolemaic model mathematical, and not physical.<a class="footnote-ref" id="fnref:57" href="#fn:57">57</a><a class="footnote-ref" id="fnref:58" href="#fn:58">58</a> His system spread throughout most of Europe in the 13th century, with debates and refutations of his ideas continued to the 16th century.<a class="footnote-ref" id="fnref:59" href="#fn:59">59</a>
The <a href="/facts/Maragheh_observatory/PVujNHan">Maragha</a> school of astronomy in <a href="/facts/Ilkhanid/ukltWdQk">Ilkhanid</a>-era Persia further developed "non-Ptolemaic" planetary models involving <a href="/facts/Earth%2527s_rotation/mDbXcKUx">Earth's rotation</a>. Notable astronomers of this school are <a href="/facts/Al-Urdi/E0JANVGa">Al-Urdi</a> (d. 1266) <a href="/facts/Najm_al-D%25C4%25ABn_al-Qazw%25C4%25ABn%25C4%25AB_al-K%25C4%2581tib%25C4%25AB/sCmWSGlL">Al-Katibi</a> (d. 1277),<a class="footnote-ref" id="fnref:60" href="#fn:60">60</a> and <a href="/facts/Nasir_al-Din_al-Tusi/BFScoqbf">Al-Tusi</a> (d. 1274).
The arguments and evidence used resemble those used by Copernicus to support the Earth's motion.<a class="footnote-ref" id="fnref:61" href="#fn:61">61</a><a class="footnote-ref" id="fnref:62" href="#fn:62">62</a>
The criticism of Ptolemy as developed by <a href="/facts/Averroes/kPezHDV7">Averroes</a> and by the Maragha school explicitly address the <a href="/facts/Earth%2527s_rotation/mDbXcKUx">Earth's rotation</a> but it did not arrive at explicit heliocentrism.<a class="footnote-ref" id="fnref:63" href="#fn:63">63</a>
The observations of the Maragha school were further improved at the Timurid-era <a href="/facts/Ulugh_Beg_Observatory/BHpfrquw">Samarkand observatory</a> under <a href="/facts/Ali_Qushji/1MVRaFl7">Qushji</a> (1403–1474).

<h3>Medieval India</h3>
In <a href="/facts/India/QW4TV4sy">India</a>, <a href="/facts/Nilakantha_Somayaji/myYT4wWb">Nilakantha Somayaji</a> (1444–1544), in his Aryabhatiyabhasya, a commentary on Aryabhata's Aryabhatiya, developed a computational system for a geo-heliocentric planetary model, in which the planets orbit the Sun, which in turn orbits the Earth, similar to the <a href="/facts/Tychonic_system/nRqoQu2K">system later proposed</a> by <a href="/facts/Tycho_Brahe/HroPxnCq">Tycho Brahe</a>. In the <a href="/facts/Tantrasamgraha/kkv6oHQC">Tantrasamgraha</a> (1501), Somayaji further revised his planetary system, which was mathematically more accurate at predicting the heliocentric orbits of the interior planets than both the Tychonic and <a href="/facts/Copernican_heliocentrism/0PpeLDRA">Copernican models</a>,<a class="footnote-ref" id="fnref:64" href="#fn:64">64</a><a class="footnote-ref" id="fnref:65" href="#fn:65">65</a> but did not propose any specific models of the universe.<a class="footnote-ref" id="fnref:66" href="#fn:66">66</a> Nilakantha's planetary system also incorporated the Earth's rotation on its axis.<a class="footnote-ref" id="fnref:67" href="#fn:67">67</a> Most astronomers of the <a href="/facts/Kerala_school_of_astronomy_and_mathematics/lkJPFMKe">Kerala school of astronomy and mathematics</a> seem to have accepted his planetary model.<a class="footnote-ref" id="fnref:68" href="#fn:68">68</a><a class="footnote-ref" id="fnref:69" href="#fn:69">69</a>

<h2 id="renaissance-era-astronomy">Renaissance-era astronomy</h2>
See also: <a href="/facts/History_of_science_in_the_Renaissance/pR2jEdy3">History of science in the Renaissance</a>
<h3>Medieval period</h3>
<a href="/facts/Martianus_Capella/zQk4eMed">Martianus Capella</a> (5th century CE) expressed the opinion that the planets Venus and Mercury did not go about the Earth but instead circled the Sun.<a class="footnote-ref" id="fnref:70" href="#fn:70">70</a> Capella's model was discussed in the <a href="/facts/Early_Middle_Ages/9FrTq3rt">Early Middle Ages</a> by various anonymous 9th-century commentators<a class="footnote-ref" id="fnref:71" href="#fn:71">71</a> and Copernicus mentions him as an influence on his own work.<a class="footnote-ref" id="fnref:72" href="#fn:72">72</a> <a href="/facts/Macrobius/f11D3xkT">Macrobius</a> (420 CE) described a heliocentric model.<a class="footnote-ref" id="fnref:73" href="#fn:73">73</a> <a href="/facts/John_Scotus_Eriugena/enXqmvu8">John Scotus Eriugena</a>(815-877 CE) proposed a model reminiscent of that from Tycho Brahe.<a class="footnote-ref" id="fnref:74" href="#fn:74">74</a>
In the 14th century, bishop <a href="/facts/Nicole_Oresme/sv3C8R2s">Nicole Oresme</a> discussed the possibility that the Earth rotated on its axis, while Cardinal <a href="/facts/Nicholas_of_Cusa/Ma4hHsfh">Nicholas of Cusa</a> in his <a href="/facts/De_Docta_Ignorantia/grc9ujvc">Learned Ignorance</a> asked whether there was any reason to assert that the Sun (or any other point) was the center of the universe. In parallel to a mystical definition of God, Cusa wrote that "Thus the fabric of the world (machina mundi) will quasi have its center everywhere and circumference nowhere,"<a class="footnote-ref" id="fnref:75" href="#fn:75">75</a> recalling <a href="/facts/Hermes_Trismegistus/YaPdy9Wr">Hermes Trismegistus</a>.<a class="footnote-ref" id="fnref:76" href="#fn:76">76</a>
Some historians maintain that the thought of the <a href="/facts/Maragheh_observatory/PVujNHan">Maragheh observatory</a>, in particular the mathematical devices known as the <a href="/facts/Urdi_lemma/E0JANVGa">Urdi lemma</a> and the <a href="/facts/Tusi_couple/KRFS1q9y">Tusi couple</a>, influenced Renaissance-era European astronomy, and thus was indirectly received by Renaissance-era European astronomy and thus by <a href="/facts/Copernicus/RvzhHNQR">Copernicus</a>.<a class="footnote-ref" id="fnref:77" href="#fn:77">77</a><a class="footnote-ref" id="fnref:78" href="#fn:78">78</a><a class="footnote-ref" id="fnref:79" href="#fn:79">79</a><a class="footnote-ref" id="fnref:80" href="#fn:80">80</a><a class="footnote-ref" id="fnref:81" href="#fn:81">81</a>
Copernicus used such devices in the same planetary models as found in Arabic sources.<a class="footnote-ref" id="fnref:82" href="#fn:82">82</a> The exact replacement of the <a href="/facts/Equant/Eq942l8h">equant</a> by two <a href="/facts/Epicycles/XNgX35P7">epicycles</a> used by Copernicus in the <a href="/facts/Commentariolus/hK3erT16">Commentariolus</a> was found in an earlier work by <a href="/facts/Ibn_al-Shatir/AaQkf0Dq">Ibn al-Shatir</a> (d. c. 1375) of Damascus.<a class="footnote-ref" id="fnref:83" href="#fn:83">83</a> Copernicus' lunar and Mercury models are also identical to Ibn al-Shatir's.<a class="footnote-ref" id="fnref:84" href="#fn:84">84</a>
While the influence of the criticism of Ptolemy by Averroes on Renaissance thought is clear and explicit, the claim of direct influence of the
Maragha school, postulated by <a href="/facts/Otto_E._Neugebauer/86rvYLg5">Otto E. Neugebauer</a> in 1957, remains an open question.<a class="footnote-ref" id="fnref:85" href="#fn:85">85</a><a class="footnote-ref" id="fnref:86" href="#fn:86">86</a><a class="footnote-ref" id="fnref:87" href="#fn:87">87</a> Since the <a href="/facts/Tusi_couple/KRFS1q9y">Tusi couple</a> was used by Copernicus in his reformulation of mathematical astronomy, there is a growing consensus that he became aware of this idea in some way. One possible route of transmission may have been through <a href="/facts/Byzantine_science/FDArCEPw">Byzantine science</a>, which translated some of <a href="/facts/Nas%25C4%25ABr_al-D%25C4%25ABn_al-T%25C5%25ABs%25C4%25AB/BFScoqbf">al-Tusi</a>'s works from Arabic into <a href="/facts/Medieval_Greek/aXKrQL0h">Byzantine Greek</a>. Several Byzantine Greek manuscripts containing the Tusi couple are still extant in Italy.<a class="footnote-ref" id="fnref:88" href="#fn:88">88</a> The Mathematics Genealogy Project suggests that there is a "genealogy" of Nasir al-Dīn al-Ṭūsī → Shams al‐Dīn al‐Bukhārī → <a href="/facts/Gregory_Chioniades/M2qWoVQN">Gregory Chioniades</a> → <a href="/facts/Manuel_Bryennios/63CB7wCv">Manuel Bryennios</a> → <a href="/facts/Theodore_Metochites/YvP3wajW">Theodore Metochites</a> → <a href="/facts/Gregory_Palamas/W2GKaV2J">Gregory Palamas</a> → <a href="/facts/Nilos_Kabasilas/nwJvlcX2">Nilos Kabasilas</a> → <a href="/facts/Demetrios_Kydones/taAhohRB">Demetrios Kydones</a> → <a href="/facts/Gemistos_Plethon/HGoKD0zw">Gemistos Plethon</a> → <a href="/facts/Basilios_Bessarion/uML6WI4N">Basilios Bessarion</a> → <a href="/facts/Johannes_Regiomontanus/CrMSdtQU">Johannes Regiomontanus</a> → <a href="/facts/Domenico_Maria_Novara_da_Ferrara/040BQU1T">Domenico Maria Novara da Ferrara</a> → Nicolaus (Mikołaj Kopernik) Copernicus.<a class="footnote-ref" id="fnref:89" href="#fn:89">89</a> <a href="/facts/Leonardo_da_Vinci/E83tcPl2">Leonardo da Vinci</a> (1452–1519) wrote "Il sole non si move." ("The Sun does not move.")<a class="footnote-ref" id="fnref:90" href="#fn:90">90</a> and he was a student of a student of Bessarion according to the <a href="/facts/Mathematics_Genealogy_Project/J7AFo1Do">Mathematics Genealogy Project</a>.<a class="footnote-ref" id="fnref:91" href="#fn:91">91</a> It has been suggested that the idea of the Tusi couple may have arrived in Europe leaving few manuscript traces, since it could have occurred without the translation of any Arabic text into Latin.<a class="footnote-ref" id="fnref:92" href="#fn:92">92</a><a class="footnote-ref" id="fnref:93" href="#fn:93">93</a>
Other scholars have argued that Copernicus could well have developed these ideas independently of the late Islamic tradition.<a class="footnote-ref" id="fnref:94" href="#fn:94">94</a><a class="footnote-ref" id="fnref:95" href="#fn:95">95</a><a class="footnote-ref" id="fnref:96" href="#fn:96">96</a><a class="footnote-ref" id="fnref:97" href="#fn:97">97</a> Copernicus explicitly references several astronomers of the "<a href="/facts/Islamic_Golden_Age/yAeG2rBA">Islamic Golden Age</a>" (10th to 12th centuries) in De Revolutionibus: <a href="/facts/Al-Battani/mzsBlt1T">Albategnius (Al-Battani)</a>, <a href="/facts/Averroes/kPezHDV7">Averroes</a> (Ibn Rushd), <a href="/facts/Thabit_ibn_Qurra/zuHkTsqK">Thebit (Thabit Ibn Qurra)</a>, <a href="/facts/Al-Zarqali/SYBl1p2m">Arzachel (Al-Zarqali)</a>, and <a href="/facts/Al-Bitruji/IK3BXzqQ">Alpetragius (Al-Bitruji)</a>, but he does not show awareness of the existence of any of the later astronomers of the Maragha school.<a class="footnote-ref" id="fnref:98" href="#fn:98">98</a>
It has been argued that Copernicus could have independently discovered the Tusi couple or took the idea from <a href="/facts/Proclus/DRh6TKdX">Proclus</a>'s Commentary on the First Book of <a href="/facts/Euclid%2527s_Elements/nPKvCIxs">Euclid</a>,<a class="footnote-ref" id="fnref:99" href="#fn:99">99</a> which Copernicus cited.<a class="footnote-ref" id="fnref:100" href="#fn:100">100</a> Another possible source for Copernicus' knowledge of this mathematical device is the Questiones de Spera of <a href="/facts/Nicole_Oresme/sv3C8R2s">Nicole Oresme</a>, who described how a reciprocating linear motion of a celestial body could be produced by a combination of circular motions similar to those proposed by al-Tusi.<a class="footnote-ref" id="fnref:101" href="#fn:101">101</a>
The state of knowledge on planetary theory received by Copernicus is summarized in <a href="/facts/Georg_von_Peuerbach/VCAn8Ecd">Georg von Peuerbach</a>'s Theoricae Novae Planetarum (printed in 1472 by <a href="/facts/Regiomontanus/CrMSdtQU">Regiomontanus</a>). By 1470, the accuracy of observations by the Vienna school of astronomy, of which <a href="/facts/Georg_von_Peuerbach/VCAn8Ecd">Peuerbach</a> and <a href="/facts/Regiomontanus/CrMSdtQU">Regiomontanus</a> were members, was high enough to make the eventual development of heliocentrism inevitable, and indeed it is possible that Regiomontanus did arrive at an explicit theory of heliocentrism before his death in 1476, some 30 years before Copernicus.<a class="footnote-ref" id="fnref:102" href="#fn:102">102</a>

<h3>Copernican heliocentrism</h3>
Main article: <a href="/facts/Copernican_heliocentrism/0PpeLDRA">Copernican heliocentrism</a>

<a href="/facts/Nicolaus_Copernicus/RvzhHNQR">Nicolaus Copernicus</a> in his <a href="/facts/De_revolutionibus_orbium_coelestium/8J8EQEY5">De revolutionibus orbium coelestium</a> ("On the revolution of heavenly spheres", first printed in 1543 in <a href="/facts/Nuremberg/Bht6TsP4">Nuremberg</a>), presented a discussion of a heliocentric model of the universe in much the same way as <a href="/facts/Ptolemy/htudGQTQ">Ptolemy</a> in the 2nd century had presented his geocentric model in his <a href="/facts/Almagest/30qaBRAq">Almagest</a>. Copernicus discussed the philosophical implications of his proposed system, elaborated it in geometrical detail, used selected astronomical observations to derive the parameters of his model, and wrote astronomical tables which enabled one to compute the past and future positions of the stars and planets. In doing so, Copernicus moved heliocentrism from philosophical speculation to predictive geometrical astronomy. In reality, Copernicus' system did not predict the planets' positions any better than the Ptolemaic system.<a class="footnote-ref" id="fnref:103" href="#fn:103">103</a> This theory resolved the issue of planetary <a href="/facts/Retrograde_motion/1HCbwQqy">retrograde motion</a> by arguing that such motion was only perceived and apparent, rather than <a href="/facts/Reality/oC1xokDB">real</a>: it was a <a href="/facts/Parallax/Gu8W21LP">parallax</a> effect, as an object that one is passing seems to move backwards against the horizon. This issue was also resolved in the geocentric <a href="/facts/Tychonic_system/nRqoQu2K">Tychonic system</a>; the latter, however, while eliminating the major <a href="/facts/Epicycle/XNgX35P7">epicycles</a>, retained as a physical reality the irregular back-and-forth motion of the planets, which Kepler characterized as a "<a href="/facts/Pretzel/4frgkRkK">pretzel</a>".<a class="footnote-ref" id="fnref:104" href="#fn:104">104</a>
Copernicus cited Aristarchus in an early (unpublished) manuscript of De Revolutionibus (which still survives), stating: "Philolaus believed in the mobility of the earth, and some even say that Aristarchus of Samos was of that opinion."<a class="footnote-ref" id="fnref:105" href="#fn:105">105</a> However, in the published version he restricts himself to noting that in works by <a href="/facts/Cicero/A37U7jaN">Cicero</a> he had found an account of the theories of <a href="/facts/Hicetas/SFQ4m6Iw">Hicetas</a> and that <a href="/facts/Plutarch/p3bywktN">Plutarch</a> had provided him with an account of the <a href="/facts/Pythagoreans/25BjMN2z">Pythagoreans</a>, <a href="/facts/Heraclides_Ponticus/edDyDjrM">Heraclides Ponticus</a>, <a href="/facts/Philolaus/xVosbQjq">Philolaus</a>, and <a href="/facts/Ecphantus/w0MKL0x4">Ecphantus</a>. These authors had proposed a moving Earth, which did not, however, revolve around a central sun.

<h2 id="reception-in-early-modern-europe">Reception in Early Modern Europe</h2>
Main article: <a href="/facts/Copernican_Revolution/cthYYtBg">Copernican Revolution</a>
<h3>Circulation of Commentariolus (published before 1515)</h3>
The first information about the heliocentric views of <a href="/facts/Nicolaus_Copernicus/RvzhHNQR">Nicolaus Copernicus</a> was circulated in manuscript completed some time before May 1, 1514.<a class="footnote-ref" id="fnref:106" href="#fn:106">106</a> In 1533, <a href="/facts/Johann_Albrecht_Widmannstetter/50VbL3gp">Johann Albrecht Widmannstetter</a> delivered in Rome a series of lectures outlining Copernicus' theory. The lectures were heard with interest by <a href="/facts/Pope_Clement_VII/LtYJwhAe">Pope Clement VII</a> and several Catholic <a href="/facts/Cardinal_(Catholicism)/Acxx5Hd4">cardinals</a>.<a class="footnote-ref" id="fnref:107" href="#fn:107">107</a>
In 1539, <a href="/facts/Martin_Luther/7nwEeL0L">Martin Luther</a> purportedly said:

<blockquote>"There is talk of a new astrologer who wants to prove that the earth moves and goes around instead of the sky, the sun, the moon, just as if somebody were moving in a carriage or ship might hold that he was sitting still and at rest while the earth and the trees walked and moved. But that is how things are nowadays: when a man wishes to be clever he must … invent something special, and the way he does it must needs be the best! The fool wants to turn the whole art of astronomy upside-down. However, as Holy Scripture tells us, so did Joshua bid the sun to stand still and not the earth."<a class="footnote-ref" id="fnref:108" href="#fn:108">108</a></blockquote>
This was reported in the context of a conversation at the dinner table and not a formal statement of faith. <a href="/facts/Melanchthon/hQtzHQjQ">Melanchthon</a>, however, opposed the doctrine over a period of years.<a class="footnote-ref" id="fnref:109" href="#fn:109">109</a><a class="footnote-ref" id="fnref:110" href="#fn:110">110</a>

<h3>Publication of De Revolutionibus (1543)</h3>
<a href="/facts/Nicolaus_Copernicus/RvzhHNQR">Nicolaus Copernicus</a> published the definitive statement of his system in <a href="/facts/De_Revolutionibus_Orbium_Coelestium/8J8EQEY5">De Revolutionibus</a> in 1543. Copernicus began to write it in 1506 and finished it in 1530, but did not publish it until the year of his death. Although he was in good standing with the Church and had dedicated the book to <a href="/facts/Pope_Paul_III/fq3qarwb">Pope Paul III</a>, the published form contained an unsigned preface by <a href="/facts/Andreas_Osiander/hTTdJHVz">Osiander</a> defending the system and arguing that it was useful for computation even if its hypotheses were not necessarily true. Possibly because of that preface, the work of Copernicus inspired very little debate on whether it might be <a href="/facts/Heresy/1eHqC2km">heretical</a> during the next 60 years. There was an early suggestion among <a href="/facts/Dominican_Order/n9l5y8Yk">Dominicans</a> that the teaching of heliocentrism should be banned, but nothing came of it at the time.
Some years after the publication of De Revolutionibus <a href="/facts/John_Calvin/CrUIG3p3">John Calvin</a> preached a sermon in which he denounced those who "pervert the order of nature" by saying that "the sun does not move and that it is the earth that revolves and that it turns".<a class="footnote-ref" id="fnref:111" href="#fn:111">111</a><a class="footnote-ref" id="fnref:112" href="#fn:112">112</a>

<h3>Tycho Brahe's geo-heliocentric system (c. 1587)</h3>
Main article: <a href="/facts/Tychonic_system/nRqoQu2K">Tychonic system</a>

Prior to the publication of De Revolutionibus, the most widely accepted system had been proposed by <a href="/facts/Ptolemy/htudGQTQ">Ptolemy</a>, in which the <a href="/facts/Earth/HLLmDfj0">Earth</a> was the center of the universe and all celestial bodies orbited it. <a href="/facts/Tycho_Brahe/HroPxnCq">Tycho Brahe</a>, arguably the most accomplished astronomer of his time, advocated against Copernicus' heliocentric system and for an alternative to the Ptolemaic geocentric system: a geo-heliocentric system now known as the <a href="/facts/Tychonic_system/nRqoQu2K">Tychonic system</a> in which the Sun and Moon orbit the Earth, Mercury and Venus orbit the Sun inside the Sun's orbit of the Earth, and Mars, Jupiter and Saturn orbit the Sun outside the Sun's orbit of the Earth.
Tycho appreciated the Copernican system, but objected to the idea of a moving Earth on the basis of <a href="/facts/Physics/a7aH2y08">physics</a>, <a href="/facts/Astronomy/0ArJVM1p">astronomy</a>, and <a href="/facts/Religion/cxntrD0R">religion</a>. The <a href="/facts/Aristotelian_physics/1EpHTb2Q">Aristotelian physics</a> of the time (modern <a href="/facts/Newtonian_physics/ykG8upsN">Newtonian physics</a> was still a century away) offered no physical explanation for the motion of a massive body like Earth, whereas it could easily explain the motion of heavenly bodies by postulating that they were made of a different sort substance called <a href="/facts/Aether_(classical_element)/TcyRaF2q">aether</a> that moved naturally. So Tycho said that the Copernican system "...expertly and completely circumvents all that is superfluous or discordant in the system of Ptolemy. On no point does it offend the principle of mathematics. Yet it ascribes to the Earth, that hulking, lazy body, unfit for motion, a motion as quick as that of the aethereal torches, and a triple motion at that."<a class="footnote-ref" id="fnref:113" href="#fn:113">113</a> Likewise, Tycho took issue with the vast distances to the stars that Aristarchus and Copernicus had assumed in order to explain the lack of any visible parallax. Tycho had measured the <a href="/facts/Apparent_magnitude/7pCTF1Me">apparent sizes of stars</a> (now known to be illusory), and used geometry to calculate that in order to both have those apparent sizes and be as far away as heliocentrism required, stars would have to be huge (much larger than the sun; the size of Earth's orbit or larger). Regarding this Tycho wrote, "Deduce these things geometrically if you like, and you will see how many absurdities (not to mention others) accompany this assumption [of the motion of the earth] by inference."<a class="footnote-ref" id="fnref:114" href="#fn:114">114</a> He also cited the Copernican system's "opposition to the authority of Sacred Scripture in more than one place" as a reason why one might wish to reject it, and observed that his own geo-heliocentric alternative "offended neither the principles of physics nor Holy Scripture."<a class="footnote-ref" id="fnref:115" href="#fn:115">115</a>
The <a href="/facts/Jesuits/n0PeYBB8">Jesuits</a> astronomers in <a href="/facts/Rome/bh1Ttx3T">Rome</a> were at first unreceptive to Tycho's system; the most prominent, <a href="/facts/Christopher_Clavius/1mefR30R">Clavius</a>, commented that Tycho was "confusing all of astronomy, because he wants to have <a href="/facts/Mars/AQGtVvz0">Mars</a> lower than the Sun."<a class="footnote-ref" id="fnref:116" href="#fn:116">116</a> However, after the advent of the telescope showed problems with some geocentric models (by demonstrating that Venus circles the Sun, for example), the Tychonic system and variations on that system became popular among geocentrists, and the Jesuit astronomer <a href="/facts/Giovanni_Battista_Riccioli/RjD2EPTw">Giovanni Battista Riccioli</a> would continue Tycho's use of physics, stellar astronomy (now with a telescope), and religion to argue against heliocentrism and for Tycho's system well into the seventeenth century.

<h3>Giordano Bruno</h3>
During <a href="/facts/Giordano_Bruno/Xx30G4cc">Giordano Bruno</a>'s lifetime, he is the only known person to defend Copernicus' heliocentrism.<a class="footnote-ref" id="fnref:117" href="#fn:117">117</a> In 1584, Bruno published two dialogues (La Cena de le Ceneri and De l'infinito universo et mondi) in which he argued against the planetary spheres (<a href="/facts/Christoph_Rothmann/hBL9TlpI">Christoph Rothmann</a> did the same in 1586 as did <a href="/facts/Tycho_Brahe/HroPxnCq">Tycho Brahe</a> in 1587) and affirmed the Copernican principle.
In particular, to support the Copernican view and oppose the objection according to which the motion of the Earth would be perceived by means of the motion of winds, clouds etc., in La Cena de le Ceneri Bruno anticipates some of the arguments of Galilei on the relativity principle.<a class="footnote-ref" id="fnref:118" href="#fn:118">118</a> Note that he also uses the example now known as <a href="/facts/Galileo%2527s_ship/zSkSLIbs">Galileo's ship</a>.<a class="footnote-ref" id="fnref:119" href="#fn:119">119</a>

<h3>Johannes Kepler</h3>
Using measurements made at Tycho's observatory, <a href="/facts/Johannes_Kepler/wk6GTN3C">Johannes Kepler</a> developed his <a href="/facts/Kepler%2527s_laws_of_planetary_motion/jYQoIBjM">laws of planetary motion</a> between 1609 and 1619.<a class="footnote-ref" id="fnref:120" href="#fn:120">120</a> In <a href="/facts/Astronomia_nova/5MdQcSD8">Astronomia nova</a> (1609), Kepler made a diagram of the movement of Mars in relation to Earth if Earth were at the center of its orbit, which shows that Mars' orbit would be completely imperfect and never follow along the same path. To solve the apparent derivation of Mars' orbit from a perfect circle, Kepler derived both a mathematical definition and, independently, a matching ellipse around the Sun to explain the motion of the red planet.<a class="footnote-ref" id="fnref:121" href="#fn:121">121</a>
Between 1617 and 1621, Kepler developed a heliocentric model of the Solar System in <a href="/facts/Epitome_astronomiae_Copernicanae/hYNroSkD">Epitome astronomiae Copernicanae</a>, in which all the planets have elliptical orbits. This provided significantly increased accuracy in predicting the position of the planets. Kepler's ideas were not immediately accepted, and Galileo for example ignored them. In 1621, Epitome astronomia Copernicanae was placed on the Catholic Church's index of prohibited books despite Kepler being a Protestant.

<h3>Galileo Galilei and 1616 ban against Copernicanism</h3>
Main article: <a href="/facts/Galileo_affair/T1mo9s3B">Galileo affair</a>

Galileo was able to look at the night sky with the newly invented telescope. He published his observations that <a href="/facts/Galilean_moons/aN6tLUFc">Jupiter is orbited by moons</a> and that the Sun rotates in his <a href="/facts/Sidereus_Nuncius/B1xhWt2j">Sidereus Nuncius</a> (1610)<a class="footnote-ref" id="fnref:122" href="#fn:122">122</a> and <a href="/facts/Letters_on_Sunspots/qUGeMWU2">Letters on Sunspots</a> (1613), respectively. Around this time, he also announced that <a href="/facts/Phases_of_Venus/CG8zmIlH">Venus exhibits a full range of phases</a> (satisfying an argument that had been made against Copernicus).<a class="footnote-ref" id="fnref:123" href="#fn:123">123</a> As the Jesuit astronomers confirmed Galileo's observations, the Jesuits moved away from the Ptolemaic model and toward Tycho's teachings.<a class="footnote-ref" id="fnref:124" href="#fn:124">124</a>
In his 1615 "<a href="/facts/Letter_to_the_Grand_Duchess_Christina/mpcea4UV">Letter to the Grand Duchess Christina</a>", Galileo defended heliocentrism, and claimed it was not contrary to <a href="/facts/Holy_Scripture/H2HjQEYv">Holy Scripture</a>. He took <a href="/facts/Augustine_of_Hippo/RJI1otNA">Augustine</a>'s position on Scripture: not to take every passage literally when the scripture in question is in a Bible book of poetry and songs, not a book of instructions or history. The writers of the Scripture wrote from the perspective of the terrestrial world, and from that vantage point the Sun does rise and set. In fact, it is the Earth's rotation which gives the impression of the Sun in motion across the sky.
In February 1615, prominent Dominicans including Thomaso Caccini and <a href="/facts/Niccol%25C3%25B2_Lorini/2dwIM3TI">Niccolò Lorini</a> brought Galileo's writings on heliocentrism to the attention of the Inquisition, because they appeared to violate Holy Scripture and the decrees of the <a href="/facts/Council_of_Trent/vRPIBssJ">Council of Trent</a>.<a class="footnote-ref" id="fnref:125" href="#fn:125">125</a><a class="footnote-ref" id="fnref:126" href="#fn:126">126</a><a class="footnote-ref" id="fnref:127" href="#fn:127">127</a><a class="footnote-ref" id="fnref:128" href="#fn:128">128</a> Cardinal and Inquisitor <a href="/facts/Robert_Bellarmine/kRnsTVXn">Robert Bellarmine</a> was called upon to adjudicate, and wrote in April that treating heliocentrism as a real phenomenon would be "a very dangerous thing," irritating philosophers and <a href="/facts/Theologians/N71Fyw2M">theologians</a>, and harming "the Holy Faith by rendering Holy Scripture as false."<a class="footnote-ref" id="fnref:129" href="#fn:129">129</a>
In January 1616, Msgr. <a href="/facts/Francesco_Ingoli/GBhSRPBt">Francesco Ingoli</a> addressed an essay to Galileo disputing the Copernican system. Galileo later stated that he believed this essay to have been instrumental in the ban against Copernicanism that followed in February.<a class="footnote-ref" id="fnref:130" href="#fn:130">130</a> According to Maurice Finocchiaro, Ingoli had probably been commissioned by the Inquisition to write an expert opinion on the controversy, and the essay provided the "chief direct basis" for the ban.<a class="footnote-ref" id="fnref:131" href="#fn:131">131</a> The essay focused on eighteen physical and mathematical arguments against heliocentrism. It borrowed primarily from the arguments of Tycho Brahe, and it notedly mentioned the problem that heliocentrism requires the stars to be much larger than the Sun. Ingoli wrote that the great distance to the stars in the heliocentric theory "clearly proves ... the fixed stars to be of such size, as they may surpass or equal the size of the orbit circle of the Earth itself."<a class="footnote-ref" id="fnref:132" href="#fn:132">132</a> Ingoli included four theological arguments in the essay, but suggested to Galileo that he focus on the physical and mathematical arguments. Galileo did not write a response to Ingoli until 1624.<a class="footnote-ref" id="fnref:133" href="#fn:133">133</a>
In February 1616, the Inquisition assembled a committee of theologians, known as qualifiers, who delivered their unanimous report condemning heliocentrism as "foolish and absurd in philosophy, and formally heretical since it explicitly contradicts in many places the sense of Holy Scripture." The Inquisition also determined that the Earth's motion "receives the same judgement in philosophy and ... in regard to theological truth it is at least erroneous in faith."<a class="footnote-ref" id="fnref:134" href="#fn:134">134</a><a class="footnote-ref" id="fnref:135" href="#fn:135">135</a> Bellarmine personally ordered Galileo

<blockquote>...to abstain completely from teaching or defending this doctrine and opinion or from discussing it... to abandon completely... the opinion that the sun stands still at the center of the world and the earth moves, and henceforth not to hold, teach, or defend it in any way whatever, either orally or in writing.— Bellarmine and the Inquisition's injunction against Galileo, 1616.<a class="footnote-ref" id="fnref:136" href="#fn:136">136</a></blockquote>
In March 1616, after the Inquisition's injunction against Galileo, the papal <a href="/facts/Theologian_of_the_Pontifical_Household/j3dow8hN">Master of the Sacred Palace</a>, <a href="/facts/Congregation_of_the_Index/DEcvFQpm">Congregation of the Index</a>, and the Pope banned all books and letters advocating the Copernican system, which they called "the false Pythagorean doctrine, altogether contrary to Holy Scripture."<a class="footnote-ref" id="fnref:137" href="#fn:137">137</a><a class="footnote-ref" id="fnref:138" href="#fn:138">138</a> In 1618, the Holy Office recommended that a modified version of Copernicus' De Revolutionibus be allowed for use in calendric calculations, though the original publication remained forbidden until 1758.<a class="footnote-ref" id="fnref:139" href="#fn:139">139</a>
<a href="/facts/Pope_Urban_VIII/pb01Ck1D">Pope Urban VIII</a> encouraged Galileo to publish the pros and cons of heliocentrism. Galileo's response, <a href="/facts/Dialogue_concerning_the_two_chief_world_systems/fwvFooB3">Dialogue concerning the two chief world systems</a> (1632), clearly advocated heliocentrism, despite his declaration in the preface that,

<blockquote>
I will endeavour to show that all experiments that can be made upon the Earth are insufficient means to conclude for its mobility but are indifferently applicable to the Earth, movable or immovable...<a class="footnote-ref" id="fnref:140" href="#fn:140">140</a>

</blockquote>
and his straightforward statement,

<blockquote>
I might very rationally put it in dispute, whether there be any such centre in nature, or no; being that neither you nor any one else hath ever proved, whether the World be finite and figurate, or else infinite and interminate; yet nevertheless granting you, for the present, that it is finite, and of a terminate Spherical Figure, and that thereupon it hath its centre...<a class="footnote-ref" id="fnref:141" href="#fn:141">141</a>

</blockquote>
Some ecclesiastics also interpreted the book as characterizing the <a href="/facts/Pope/9zVokNjn">Pope</a> as a simpleton, since his viewpoint in the dialogue was advocated by the character <a href="/facts/Simplicius_of_Cilicia/q8Q7Ssl2">Simplicio</a>. Urban VIII became hostile to Galileo and he was again summoned to Rome.<a class="footnote-ref" id="fnref:142" href="#fn:142">142</a> Galileo's trial in 1633 involved making fine distinctions between "teaching" and "holding and defending as true". For advancing heliocentric theory Galileo was forced to recant Copernicanism and was put under house arrest for the last few years of his life. According to J. L. Heilbron, informed contemporaries of Galileo's "appreciated that the reference to heresy in connection with Galileo or Copernicus had no general or theological significance."<a class="footnote-ref" id="fnref:143" href="#fn:143">143</a>
In 1664, <a href="/facts/Pope_Alexander_VII/3HATEhxh">Pope Alexander VII</a> published his <a href="/facts/Index_Librorum_Prohibitorum/DEcvFQpm">Index Librorum Prohibitorum</a> Alexandri VII Pontificis Maximi jussu editus (Index of Prohibited Books, published by order of Alexander VII, <a href="/facts/Pontifex_Maximus/hGJnFXlg">P.M.</a>) which included all previous condemnations of heliocentric books.<a class="footnote-ref" id="fnref:144" href="#fn:144">144</a>

<h3>Age of Reason</h3>
Further information: <a href="/facts/Science_in_the_Age_of_Enlightenment/hBtln7Lx">Science in the Age of Enlightenment</a>, <a href="/facts/17th-century_philosophy/5ksx3yJK">17th-century philosophy</a>, and <a href="/facts/Scientific_Revolution/KdeJepMq">Scientific Revolution</a>

<a href="/facts/Ren%25C3%25A9_Descartes/ohqj6DMf">René Descartes</a>' first cosmological treatise, written between 1629 and 1633 and titled <a href="/facts/The_World_(Descartes)/kceuVJL7">The World</a>, included a heliocentric model, but Descartes abandoned it in the light of Galileo's treatment.<a class="footnote-ref" id="fnref:145" href="#fn:145">145</a> In his <a href="/facts/Principles_of_Philosophy/0mdPwM29">Principles of Philosophy</a> (1644), Descartes introduced <a href="/facts/Mechanical_explanations_of_gravitation/RInspc92">a mechanical model</a> in which planets do not move relative to their immediate atmosphere, but are constituted around space-matter <a href="/facts/Vortices/K6oeqcuX">vortices</a> in <a href="/facts/Curved_space/93NBB86g">curved space</a>; these rotate due to <a href="/facts/Centrifugal_force/CWgvMw6w">centrifugal force</a> and the resulting <a href="/facts/Centripetal_force/VWBADgMM">centripetal pressure</a>.<a class="footnote-ref" id="fnref:146" href="#fn:146">146</a> The Galileo affair did little overall to slow the spread of heliocentrism across Europe, as Kepler's Epitome of Copernican Astronomy became increasingly influential in the coming decades.<a class="footnote-ref" id="fnref:147" href="#fn:147">147</a> By 1686, the model was well enough established that the general public was reading about it in <a href="/facts/Conversations_on_the_Plurality_of_Worlds/SudfX2zz">Conversations on the Plurality of Worlds</a>, published in France by <a href="/facts/Bernard_le_Bovier_de_Fontenelle/4nEusP3C">Bernard le Bovier de Fontenelle</a> and translated into English and other languages in the coming years. It has been called "one of the first great popularizations of science."<a class="footnote-ref" id="fnref:148" href="#fn:148">148</a>
In 1687, <a href="/facts/Isaac_Newton/4L7gTncN">Isaac Newton</a> published <a href="/facts/Philosophi%25C3%25A6_Naturalis_Principia_Mathematica/DRdvI3yx">Philosophiæ Naturalis Principia Mathematica</a>, which provided an explanation for Kepler's laws in terms of <a href="/facts/Universal_gravitation/F6qH2XC3">universal gravitation</a> and what came to be known as <a href="/facts/Newton%2527s_laws_of_motion/XKzGTXK1">Newton's laws of motion</a>. This placed heliocentrism on a firm theoretical foundation, although Newton's heliocentrism was of a somewhat modern kind. Already in the mid-1680s he recognized the "deviation of the Sun" from the center of gravity of the Solar System.<a class="footnote-ref" id="fnref:149" href="#fn:149">149</a> For Newton it was not precisely the center of the Sun or any other body that could be considered at rest, but "the common centre of gravity of the Earth, the Sun and all the Planets is to be esteem'd the Centre of the World", and this center of gravity "either is at rest or moves uniformly forward in a right line". Newton adopted the "at rest" alternative in view of common consent that the center, wherever it was, was at rest.<a class="footnote-ref" id="fnref:150" href="#fn:150">150</a>
Meanwhile, the Catholic Church remained opposed to heliocentrism as a literal description, but this did not by any means imply opposition to all astronomy; indeed, it needed observational data to maintain its calendar. In support of this effort it allowed the cathedrals themselves to be used as solar observatories called <a href="/facts/Sundial/eebjkDI5">meridiane</a>; i.e., they were turned into "reverse <a href="/facts/Sundial/eebjkDI5">sundials</a>", or gigantic <a href="/facts/Pinhole_camera/8JmYNdeL">pinhole cameras</a>, where the Sun's image was projected from a hole in a window in the cathedral's lantern onto a meridian line.<a class="footnote-ref" id="fnref:151" href="#fn:151">151</a>

In the mid-18th century the Church's opposition began to fade. An annotated copy of Newton's Principia was published in 1742 by Fathers le Seur and Jacquier of the Franciscan Minims, two Catholic mathematicians, with a preface stating that the author's work assumed heliocentrism and could not be explained without the theory. In 1758 the Catholic Church dropped the general prohibition of books advocating heliocentrism from the <a href="/facts/Index_Librorum_Prohibitorum/DEcvFQpm">Index of Forbidden Books</a>.<a class="footnote-ref" id="fnref:152" href="#fn:152">152</a> The Observatory of the <a href="/facts/Roman_College/D2nogT9H">Roman College</a> was established by <a href="/facts/Pope_Clement_XIV/AuR7WNqS">Pope Clement XIV</a> in 1774 (nationalized in 1878, but re-founded by <a href="/facts/Pope_Leo_XIII/bdovwR3o">Pope Leo XIII</a> as the <a href="/facts/Vatican_Observatory/TazC5hKe">Vatican Observatory</a> in 1891). In spite of dropping its active resistance to heliocentrism, the Catholic Church did not lift the prohibition of uncensored versions of Copernicus' De Revolutionibus or Galileo's Dialogue. The affair was revived in 1820, when the Master of the Sacred Palace (the Catholic Church's chief censor), <a href="/facts/Filippo_Anfossi/tSMeNgt1">Filippo Anfossi</a>, refused to license a book by a Catholic canon, Giuseppe Settele, because it openly treated heliocentrism as a physical fact.<a class="footnote-ref" id="fnref:153" href="#fn:153">153</a> Settele appealed to pope <a href="/facts/Pius_VII/hy1yt3mP">Pius VII</a>. After the matter had been reconsidered by the Congregation of the Index and the Holy Office, Anfossi's decision was overturned.<a class="footnote-ref" id="fnref:154" href="#fn:154">154</a> Pius VII approved a decree in 1822 by the <a href="/facts/Sacred_Congregation_of_the_Inquisition/7gTstCEz">Sacred Congregation of the Inquisition</a> to allow the printing of heliocentric books in Rome. Copernicus' De Revolutionibus and Galileo's Dialogue were then subsequently omitted from the next edition of the Index when it appeared in 1835.
Three apparent proofs of the heliocentric hypothesis were provided in 1727 by <a href="/facts/James_Bradley/4QnCLzmk">James Bradley</a>, in 1838 by <a href="/facts/Friedrich_Wilhelm_Bessel/82K1lJ7t">Friedrich Wilhelm Bessel</a>, and in 1851 by <a href="/facts/L%25C3%25A9on_Foucault/xG7tEDjk">Léon Foucault</a>. Bradley discovered the stellar aberration, proving the relative motion of the Earth. Bessel proved that the <a href="/facts/Stellar_parallax/ywI9UWEJ">parallax</a> of a star was greater than zero by measuring the parallax of 0.314 <a href="/facts/Arcseconds/tybs6YGC">arcseconds</a> of a star named <a href="/facts/61_Cygni/ISchaxhy">61 Cygni</a>. In the same year <a href="/facts/Friedrich_Georg_Wilhelm_Struve/ajPxYc1q">Friedrich Georg Wilhelm Struve</a> and <a href="/facts/Thomas_James_Henderson/zCJzzFwo">Thomas Henderson</a> measured the parallaxes of other stars, <a href="/facts/Vega/G3wJwhhl">Vega</a> and <a href="/facts/Alpha_Centauri/6BlySfIj">Alpha Centauri</a>. Experiments like those of Foucault were performed by V. Viviani in 1661 in Florence and by Bartolini in 1833 in Rimini.<a class="footnote-ref" id="fnref:155" href="#fn:155">155</a>

<h2 id="reception-in-judaism">Reception in Judaism</h2>
Already in the <a href="/facts/Talmud/8416nnBV">Talmud</a>, Greek philosophy and science under the general name "Greek wisdom" were considered dangerous. They were put under ban then and later for some periods.
The first <a href="/facts/Jews/T9Y4wE6A">Jewish</a> scholar to describe the Copernican system, albeit without mentioning Copernicus by name, was <a href="/facts/Judah_Loew_ben_Bezalel/HH3au5cQ">Maharal of Prague</a>, in his book "Be'er ha-Golah" (1593). Maharal makes an argument of <a href="/facts/Radical_skepticism/8BYX1YCY">radical skepticism</a>, arguing that no scientific theory can be reliable, which he illustrates by the new-fangled theory of heliocentrism upsetting even the most fundamental views on the cosmos.<a class="footnote-ref" id="fnref:156" href="#fn:156">156</a>
Copernicus is mentioned in the books of <a href="/facts/David_Gans/pya2Nuwr">David Gans</a> (1541–1613), who worked with Brahe and Kepler. Gans wrote two books on astronomy in <a href="/facts/Hebrew/hqKCSy9d">Hebrew</a>: a short one, "Magen David" (1612), and a full one, "Nehmad veNaim" (published only in 1743). He described objectively three systems: those of Ptolemy, Copernicus and Brahe, without taking sides.
<a href="/facts/Joseph_Solomon_Delmedigo/pRuvnfRR">Joseph Solomon Delmedigo</a> (1591–1655) in his "Elim" (1629) says that the arguments of Copernicus are so strong, that only an imbecile will not accept them.<a class="footnote-ref" id="fnref:157" href="#fn:157">157</a> Delmedigo studied at <a href="/facts/Padua/7yw19UVp">Padua</a> and was acquainted with Galileo.<a class="footnote-ref" id="fnref:158" href="#fn:158">158</a>
An actual controversy on the Copernican model within Judaism arises only in the early 18th century. Most authors in this period had accepted Copernican heliocentrism, with opposition from <a href="/facts/David_Nieto/1WtwW0up">David Nieto</a> and <a href="/facts/Tobias_Cohn/b65lDJeo">Tobias Cohn</a>, who argued against heliocentrism on the grounds it contradicted scripture. Nieto merely rejected the new system on those grounds without much passion, whereas Cohn went so far as to call Copernicus "a first-born of Satan", though he also acknowledged that he would have found it difficult to proffer one particular objection based on a passage from the Talmud.<a class="footnote-ref" id="fnref:159" href="#fn:159">159</a>
In the 19th century, two students of the <a href="/facts/Moses_Sofer/YlhHcWSz">Hatam Sofer</a> wrote books that were given approbations by him[who?] even though one supported heliocentrism and the other geocentrism. One, a commentary on <a href="/facts/Book_of_Genesis/uFEgtYrb">Genesis</a> titled Yafe’ah le-Ketz<a class="footnote-ref" id="fnref:160" href="#fn:160">160</a> written by R. Israel David Schlesinger resisted a heliocentric model and supported geocentrism.<a class="footnote-ref" id="fnref:161" href="#fn:161">161</a> The other, Mei Menuchot<a class="footnote-ref" id="fnref:162" href="#fn:162">162</a> written by R. Eliezer Lipmann Neusatz encouraged acceptance of the heliocentric model and other modern scientific thinking.<a class="footnote-ref" id="fnref:163" href="#fn:163">163</a>
Since the 20th century most Jews have not questioned the science of heliocentrism. Exceptions include <a href="/facts/Shlomo_Benizri/fm0XhM5o">Shlomo Benizri</a><a class="footnote-ref" id="fnref:164" href="#fn:164">164</a> and <a href="/facts/Menachem_Mendel_Schneerson/rrxDy4Xh">R. M.M. Schneerson</a> of <a href="/facts/Chabad/gK9obwFs">Chabad</a> who argued that the question of heliocentrism vs. geocentrism is obsolete because of the <a href="/facts/Relative_velocity/bVyzQ02h">relativity of motion</a>.<a class="footnote-ref" id="fnref:165" href="#fn:165">165</a> Schneerson's followers in Chabad continue to deny the heliocentric model.<a class="footnote-ref" id="fnref:166" href="#fn:166">166</a>

<h2 id="modern-science">Modern science</h2>
<h3>William Herschel's heliocentrism</h3>

In 1783, amateur astronomer <a href="/facts/William_Herschel/SsruaBvq">William Herschel</a> attempted to determine the shape of the universe by examining stars through his handmade <a href="/facts/Telescopes/BDwYahhR">telescopes</a>. Herschel was the first to propose a model of the universe based on observation and measurement.<a class="footnote-ref" id="fnref:167" href="#fn:167">167</a> At that time, the dominant assumption in cosmology was that the <a href="/facts/Milky_Way/ulF6lccN">Milky Way</a> was the entire universe, an assumption that has since been proven wrong with observations.<a class="footnote-ref" id="fnref:168" href="#fn:168">168</a> Herschel concluded that it was in the shape of a <a href="/facts/Spiral_galaxy/hRT2dtxJ">disk</a>, but assumed that the Sun was in the center of the disk, making the model heliocentric.<a class="footnote-ref" id="fnref:169" href="#fn:169">169</a><a class="footnote-ref" id="fnref:170" href="#fn:170">170</a><a class="footnote-ref" id="fnref:171" href="#fn:171">171</a><a class="footnote-ref" id="fnref:172" href="#fn:172">172</a>
Seeing that the stars belonging to the Milky Way appeared to encircle the Earth, Herschel carefully counted stars of given apparent magnitudes, and after finding the numbers were the same in all directions, concluded Earth must be close to the center of the Milky Way. However, there were two flaws in Herschel's <a href="/facts/Methodology/dk5X9Hxx">methodology</a>: magnitude is not a reliable index to the distance of stars, and some of the areas that he mistook for empty space were actually dark, obscuring nebulae that blocked his view toward the center of the Milky Way.<a class="footnote-ref" id="fnref:173" href="#fn:173">173</a>
The Herschel model remained relatively unchallenged for the next hundred years, with minor refinements. <a href="/facts/Jacobus_Kapteyn/GwwvINSR">Jacobus Kapteyn</a> introduced motion, <a href="/facts/Density/92p6hh9I">density</a>, and <a href="/facts/Luminosity/1tdhpk9l">luminosity</a> to Herschel's star counts, which still implied a near-central location of the Sun.<a class="footnote-ref" id="fnref:174" href="#fn:174">174</a>

<h3>Replacement with galactocentrism and acentrism</h3>
Main articles: <a href="/facts/Galactocentrism/cdpEM4j0">Galactocentrism</a> and <a href="/facts/Big_Bang_model/I5T1vTnv">Big Bang model</a>
Already in the early 19th century, <a href="/facts/Thomas_Wright_(astronomer)/zlfrX17L">Thomas Wright</a> and <a href="/facts/Immanuel_Kant/vIxjdy6I">Immanuel Kant</a> speculated that fuzzy patches of light called <a href="/facts/Nebula/hG6coklY">nebulae</a> were actually distant "island universes" consisting of many <a href="/facts/Star_system/1vX99BMV">stellar systems</a>.<a class="footnote-ref" id="fnref:175" href="#fn:175">175</a> The shape of the Milky Way galaxy was expected to resemble such "islands universes."
However, "scientific arguments were marshalled against such a possibility," and this view was rejected by almost all scientists until the early 20th century, with <a href="/facts/Harlow_Shapley/EBHMWFuP">Harlow Shapley</a>'s work on <a href="/facts/Globular_cluster/FL0EERJU">globular clusters</a> and <a href="/facts/Edwin_Hubble/fpX3JlbJ">Edwin Hubble</a>'s measurements in 1924. After Shapley and Hubble showed that the Sun is not the center of the universe, cosmology moved on from heliocentrism to <a href="/facts/Galactocentrism/cdpEM4j0">galactocentrism</a>, which states that the Milky Way is the center of the universe.<a class="footnote-ref" id="fnref:176" href="#fn:176">176</a>
Hubble's observations of redshift in light from distant galaxies indicated that the universe was <a href="/facts/Expansion_of_the_universe/f6Uvt79B">expanding</a> and acentric.<a class="footnote-ref" id="fnref:177" href="#fn:177">177</a> As a result, soon after galactocentrism was formulated, it was abandoned in favor of the <a href="/facts/Big_Bang/I5T1vTnv">Big Bang</a> model of the acentric expanding universe. Further assumptions, such as the <a href="/facts/Copernican_principle/9cvC9Wc7">Copernican principle</a>, the <a href="/facts/Cosmological_principle/snaj0VNu">cosmological principle</a>, <a href="/facts/Dark_energy/6bWIYewA">dark energy</a>, and <a href="/facts/Dark_matter/y5HgX55N">dark matter</a>, eventually lead to the current model of cosmology, <a href="/facts/Lambda-CDM/DmlhJHQU">Lambda-CDM</a>.

<h3>Special relativity and the "center"</h3>
The concept of an absolute velocity, including being "at rest" as a particular case, is ruled out by the <a href="/facts/Principle_of_relativity/8I2xlmoP">principle of relativity</a>, also eliminating any obvious "center" of the universe as a natural origin of coordinates. Even if the discussion is limited to the <a href="/facts/Solar_System/QIcLSazQ">Solar System</a>, the Sun is not at the geometric center of any planet's orbit, but rather approximately at one <a href="/facts/Focus_(geometry)/WFtFnqoa">focus</a> of the <a href="/facts/Ellipse/1wUDnGxY">elliptical</a> orbit. Furthermore, to the extent that a planet's mass cannot be neglected in comparison to the Sun's mass, the center of gravity of the Solar System is displaced slightly away from the center of the Sun.<a class="footnote-ref" id="fnref:178" href="#fn:178">178</a> (The masses of the planets, mostly <a href="/facts/Jupiter/95m7XjMT">Jupiter</a>, amount to 0.14% of that of the Sun.) Therefore, a hypothetical astronomer on an <a href="/facts/Extrasolar_planet/zjfmqfUf">extrasolar planet</a> would observe a small "wobble" in the Sun's motion.<a class="footnote-ref" id="fnref:179" href="#fn:179">179</a>

<h3>Modern use of geocentric and heliocentric</h3>
In modern calculations, the terms "geocentric" and "heliocentric" are often used to refer to <a href="/facts/Frame_of_reference/15yYfB9M">reference frames</a>.<a class="footnote-ref" id="fnref:180" href="#fn:180">180</a> In such systems the origin in the <a href="/facts/Center_of_mass/n4Lr9GAz">center of mass</a> of the Earth, of the Earth–Moon system, of the Sun, of the Sun plus the major planets, or of the entire Solar System, can be selected.<a class="footnote-ref" id="fnref:181" href="#fn:181">181</a> <a href="/facts/Right_ascension/z4CEsTFu">Right ascension</a> and <a href="/facts/Declination/5X4S4k9u">declination</a> are examples of geocentric coordinates, used in Earth-based observations, while the heliocentric latitude and longitude are used for orbital calculations. This leads to such terms as "heliocentric <a href="/facts/Velocity/Q3o1LVDe">velocity</a>" and "heliocentric <a href="/facts/Angular_momentum/7TuSVFxq">angular momentum</a>". In this heliocentric picture, any planet of the Solar System can be used as a source of <a href="/facts/Mechanical_energy/gI4oMzoY">mechanical energy</a> because it moves relatively to the Sun. A smaller <a href="/facts/Physical_body/WhqjK6xo">body</a> (either <a href="/facts/Spacecraft/YQqQaUw0">artificial</a> or <a href="/facts/Astronomical_object/BCHLa0Q2">natural</a>) may gain heliocentric velocity due to <a href="/facts/Gravity_assist/4sqIByot">gravity assist</a> – this effect can change the body's mechanical energy in heliocentric reference frame (although it will not changed in the planetary one). However, such selection of "geocentric" or "heliocentric" frames is merely a matter of computation. It does not have philosophical implications and does not constitute a distinct physical or <a href="/facts/Scientific_model/aNyvIyUQ">scientific model</a>. From the point of view of <a href="/facts/General_relativity/jVsoIg8X">general relativity</a>, <a href="/facts/Inertial_reference_frame/1U6TrdG3">inertial reference frames</a> do not exist at all, and any practical reference frame is only an approximation to the actual space-time, which can have higher or lower precision. Some forms of <a href="/facts/Mach%2527s_principle/J5EPg7dz">Mach's principle</a> consider the frame at rest with respect to the distant masses in the universe to have special properties.

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Copernican_principle/9cvC9Wc7">Copernican principle</a></li>
<li><a href="/facts/Copernican_Revolution_(metaphor)/cthYYtBg">Copernican Revolution (metaphor)</a></li></ul>
<h2 id="notes">Notes</h2>
 all hail to pearto

<h3>Citations</h3>

<h3>Sources</h3>

<ul><li>Baker, A. and Chapter, L. (2002), "Part 4: The Sciences". In M. M. Sharif, "A History of Muslim Philosophy", Philosophia Islamica.</li>
<li>di Bono, Mario (1995). "Copernicus, Amico, Fracastoro and Ṭūsï's Device: Observations on the Use and Transmission of a Model". Journal for the History of Astronomy. xxvi (2): 133–54. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1995JHA....26..133D">1995JHA....26..133D</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1177%2F002182869502600203">10.1177/002182869502600203</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:118330488">118330488</a>.</li>
<li><a href="/facts/Stillman_Drake/TwXUk5Km">Drake, Stillman</a> (1978). <a href="https://archive.org/details/galileoatwork00stil">Galileo At Work</a>. Chicago: University of Chicago Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-226-16226-3.</li>
<li><a href="/facts/Diogenes_La%25C3%25ABrtius/u99P8c1J">Diogenes Laërtius</a> (1972) [1925], <a href="https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3atext%3a1999.01.0258">Lives of Eminent Philosophers</a>, translated by <a href="/facts/Robert_Drew_Hicks/zrlQGnHY">Hicks, Robert Drew</a>, Cambridge, MA: Harvard University Press, retrieved July 16, 2018</li>
<li><a href="/facts/J._L._E._Dreyer/tvEsIAgf">Dreyer, John Louis Emil</a> (1953) [1906], <a href="https://archive.org/details/historyofplaneta00dreyuoft">A History of Astronomy from Thales to Kepler</a>, New York: Dover Publications, <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-486-60079-6 {{citation}}: ISBN / Date incompatibility (help)</li>
<li>Edwards, James (1998), <a href="https://books.google.com/books?id=nS51_7qbEWsC">The History and Practice of Ancient Astronomy</a>, Oxford: Oxford University Press, <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-19-509539-5, retrieved July 16, 2018</li>
<li>Fantoli, Annibale (2003). Galileo, for Copernicanism and for the church. Translated by Coyne, George V. (3rd English ed.). Notre Dame, IN: Vatican Observatory Publications / University of Notre Dame Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 88-209-7427-4. <a href="/facts/OCLC_(identifier)/Yqad8waq">OCLC</a> <a href="https://search.worldcat.org/oclc/52897897">52897897</a>.</li>
<li>Favaro, Antonio [in Italian], ed. (1907). <a href="https://web.archive.org/web/20070713092939/http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO">Le Opere di Galileo Galilei, Edizione Nazionale</a> [The Works of Galileo Galilei, National Edition] (in Italian). Vol. 19. <a href="/facts/Florence/Mx0uhNma">Florence</a>: Barbera. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-88-09-20881-0. Archived from <a href="http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO">the original</a> on July 13, 2007. {{cite book}}: ISBN / Date incompatibility (help) A searchable online copy is available on the <a href="https://web.archive.org/web/20081114183333/http://www.imss.fi.it/istituto/index.html">Institute and Museum of the History of Science</a>, Florence, and a brief overview of Le Opere is available at <a href="https://web.archive.org/web/20090103233923/http://www.finns-books.com/fgalileo.htm">Finn's fine books</a>[usurped], and <a href="https://web.archive.org/web/20110103231202/http://www.pacifier.com/~tpope/Additional_Info.htm#National_Edition">here</a>.</li>
<li>Finocchiaro, Maurice (2010), Defending Copernicus and Galileo: Critical Reasoning in the two Affairs, Springer, <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-9048132003</li>
<li><a href="/facts/Owen_Gingerich/zHjLTAsG">Gingerich, Owen</a> (2004). The Book Nobody Read. London: William Heinemann. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-434-01315-9.</li>
<li>Goddu, André (2010). Copernicus and the Aristotelian tradition. Leiden, Netherlands: Brill. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-90-04-18107-6.</li>
<li>Graney, Christopher M. (2015), Setting Aside All Authority: Giovanni Battista Riccioli and the Science against Copernicus in the Age of Galileo, University of Notre Dame Press, <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G">2015saaa.book.....G</a>, <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-268-02988-3</li>
<li><a href="/facts/T.L._Heath/E9xE228u">Heath, Sir Thomas</a> (1913). <a href="https://archive.org/details/aristarchusofsam00heatuoft">Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes</a>. London: Oxford University Press.</li>
<li><a href="/facts/John_L._Heilbron/agIwX94Y">Heilbron, John L.</a> (1999). <a href="https://books.google.com/books?id=mZWy0xPxj3EC">The Sun in the Church: Cathedrals as Solar Observatories</a>. Cambridge, MA: Harvard University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-674-00536-5.</li>
<li>Heilbron, John L. (2005). "Censorship of Astronomy in Italy after Galileo". In McMullin, Ernan (ed.). The Church and Galileo. University of Notre Dame Press, Notre Dame. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-268-03483-2.</li>
<li>Heilbron, John L. (2010). <a href="https://books.google.com/books?id=tnIVDAAAQBAJ">Galileo</a>. OUP. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-19-958352-2.</li>
<li>Joseph, George G. (2000). <a href="https://archive.org/details/crestofpeacockno00jose">The Crest of the Peacock: Non-European Roots of Mathematics</a> (2nd ed.). London: Penguin Books. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 0-691-00659-8.</li>
<li><a href="/facts/Arthur_Koestler/W0zaS410">Koestler, Arthur</a> (1990) [1959]. <a href="/facts/The_Sleepwalkers_(Koestler_book)/ga2lRq8z">The Sleepwalkers: A history of man's changing vision of the universe</a>. London: Penguin Books. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-14-019246-9. Available from the <a href="https://archive.org/details/sleepwalkershist00koes_0">Internet Archive</a><a href="/facts/Freemium/ofbqmWgu"></a>.</li>
<li><a href="/facts/Alexandre_Koyr%25C3%25A9/duJ5XGJ3">Koyré, Alexandre</a> (1957). From the Closed World to the Infinite Universe. Baltimore: Johns Hopkins Univ. Pr.</li>
<li><a href="/facts/Alexandre_Koyr%25C3%25A9/duJ5XGJ3">Koyré, Alexandre</a> (1973). The Astronomical Revolution: Copernicus – Kepler – Borelli. Ithaca, NY: Cornell University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-8014-0504-4.</li>
<li>Langford, Jerome K. (1998) [1966]. Galileo, Science and the Church (3rd ed.). St. Augustine's Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-1-890318-25-3.. Original edition by Desclee (New York, 1966)</li>
<li>Linton, Christopher M. (2004). From Eudoxus to Einstein – A History of Mathematical Astronomy. Cambridge: Cambridge University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-521-82750-8.</li>
<li><a href="/facts/Andr%25C3%25A9_Neher/5ktLkdKJ">Neher, André</a> (1977). "Copernicus in the Hebraic Literature from the Sixteenth to the Eighteenth Century". Journal of the History of Ideas. 38 (2): 221–226. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.2307%2F2708908">10.2307/2708908</a>. <a href="/facts/JSTOR_(identifier)/YTeVmaJ7">JSTOR</a> <a href="https://www.jstor.org/stable/2708908">2708908</a>.</li>
<li><a href="/facts/Plutarch/p3bywktN">Plutarch</a> (1883), <a href="https://archive.org/stream/plutarchsmorals51883plut#page/234">"On the Face Appearing within the Orb of the Moon"</a>, in Godwin, William (ed.), Plutarch's Morals, vol. 5, translated by Gent, A.G., Boston, MA: Little, Brown, and Company, pp. 234–292</li>
<li><a href="/facts/Plutarch/p3bywktN">Plutarch</a> (1957), <a href="https://archive.org/stream/moraliainfifteen12plutuoft#page/n15">"Concerning the Face Which Appears in the Orb of the Moon"</a>, in Cherniss, Harold; Helmbold, William C. (eds.), Plutarch's Moralia XII, <a href="/facts/Loeb_Classical_Library/AIRXBouP">Loeb Classical Library</a>, vol. 406, translated by <a href="/facts/Harold_F._Cherniss/gzsXpjPK">Cherniss, Harold</a>, Harvard, MA and London: Harvard University Press and William Heinemann Ltd., pp. 1–223</li>
<li>Qadir, Asghar (1989). Relativity: An introduction to the special theory. Singapore Teaneck, NJ: World Scientific. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 9971-5-0612-2. <a href="/facts/OCLC_(identifier)/Yqad8waq">OCLC</a> <a href="https://search.worldcat.org/oclc/841809663">841809663</a>.</li>
<li>Rosen, Edward (1995). Copernicus and his Successors. London: Hambledon Press. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1995cops.book.....R">1995cops.book.....R</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-1-85285-071-5.</li>
<li><a href="/facts/Lucio_Russo/xY0JTlEf">Russo, Lucio</a> (2013). <a href="https://books.google.com/books?id=ld8lBAAAQBAJ">The Forgotten Revolution: How Science Was Born in 300 BC and Why it Had to Be Reborn</a>. Translated by Levy, Silvio. <a href="/facts/Springer_Science_%2526_Business_Media/nAesf6nT">Springer Science & Business Media</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-3-642-18904-3. Retrieved June 13, 2017.</li>
<li>Russo, Lucio; Medaglia, Silvio M. (1996). "Sulla presunta accusa di empietà ad Aristarco di Samo". Quaderni Urbinati di Cultura Classica (in Italian). New Series, Vol. 53 (2): 113–121. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.2307%2F20547344">10.2307/20547344</a>. <a href="/facts/JSTOR_(identifier)/YTeVmaJ7">JSTOR</a> <a href="https://www.jstor.org/stable/20547344">20547344</a>.</li>
<li><a href="/facts/A._I._Sabra/qJY4QxqR">Sabra, A. I.</a> (1998). "Configuring the Universe: Aporetic, Problem Solving, and Kinematic Modeling as Themes of Arabic Astronomy". Perspectives on Science. 6 (3): 288–330. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1162%2Fposc_a_00552">10.1162/posc_a_00552</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:117426616">117426616</a>.</li>
<li><a href="/facts/George_Saliba/wMTAtW1x">Saliba, George</a> (1999). <a href="http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html">"Whose Science is Arabic Science in Renaissance Europe?"</a>. Columbia University.</li>
<li>The Shorter Oxford English Dictionary (6th ed.). Oxford, UK: Oxford University Press. 2007. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-19-920687-2.</li>
<li>Sharratt, Michael (1994). Galileo: Decisive Innovator. Cambridge: Cambridge University Press. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-521-56671-1.</li>
<li>Singer, Dorothea Waley (1968) [1950]. <a href="https://archive.org/details/giordanobrunohis0000sing_x8a1">Giordano Bruno: His Life and Thought</a>. New York: Greenwood Press, Publishers.</li>
<li>Smith, Homer W. (1952). <a href="https://archive.org/details/manhisgods00smit">Man and His Gods</a>. New York: <a href="/facts/Grosset_%2526_Dunlap/vQcMwCVw">Grosset & Dunlap</a>. pp. <a href="https://archive.org/details/manhisgods00smit/page/310">310–311</a>.</li>
<li>Speller, Jules (2008). <a href="https://books.google.com/books?id=jviElHq-kEcC">Galileo's Inquisition Trial Revisited</a>. Frankfurt am Main: Peter Lang. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-3-631-56229-1.</li>
<li>Thurston, Hugh (1993). Early Astronomy. New York: Springer-Verlag. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-0-387-94107-3.</li></ul>

<h2 id="external-links">External links</h2>

Wikimedia Commons has media related to Heliocentric model.

<ul><li><a href="https://web.archive.org/web/20130816025648/http://scienceray.com/astronomy/does-heliocentrism-means-that-the-sun-is-stationary/">"Does Heliocentrism Mean That the Sun is Stationary?"</a>. Scienceray. Archived from <a href="http://scienceray.com/astronomy/does-heliocentrism-means-that-the-sun-is-stationary/">the original</a> on August 16, 2013. Retrieved November 27, 2018.</li>
<li><a href="http://bldgblog.blogspot.com/2007/04/heliocentric-pantheon-interview-with.html">The Heliocentric Pantheon: An Interview with Walter Murch</a></li>
<li><a href="https://www.youtube.com/watch?v=UJ9SuchDuJc">The Heliocentric Model and Kepler's Laws of Planetary Motion</a> on <a href="/facts/YouTube_video_(identifier)/db276jst">YouTube</a> - The development of the Heliocentric model with the contributions of Nicolaus Copernicus, Giordano Bruno, Tycho Brahe, Galileo Galilei and Johannes Kepler</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Optionally capitalised, Heliocentrism or heliocentrism, according to The Shorter Oxford English Dictionary (6th ed., 2007). The term is a learned formation based on Greek Helios (ἥλιος) "Sun" and kentron (κέντρον) "center"; the adjective heliocentric is first recorded in English (as heliocentrick) in 1685, after Neo-Latin heliocentricus, in use from about the same time (as in Johann Jakob Zimmermann, Prodromus biceps cono ellipticæ et a priori demonstratæ planetarum theorices, 1679).
The abstract noun in -ism is more recent, recorded from the late 19th century (e.g. in Constance Naden, Induction and Deduction: A Historical and Critical Sketch of Successive Philosophical Conceptions Respecting the Relations Between Inductive and Deductive Thought and Other Essays), modelled after German Heliocentrismus or Heliozentrismus (c. 1870).

- The Shorter Oxford English Dictionary (6th ed.). Oxford, UK: Oxford University Press. 2007. ISBN 978-0-19-920687-2. <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Dreyer 1953, pp. 135–148; Linton 2004, pp. 38f.. The work of Aristarchus in which he proposed his heliocentric system has not survived. We only know of it now from a brief passage in Archimedes' The Sand Reckoner. - Dreyer, John Louis Emil (1953) [1906], A History of Astronomy from Thales to Kepler, New York: Dover Publications, ISBN 978-0-486-60079-6 <a href="https://archive.org/details/historyofplaneta00dreyuoft" target="_blank">https://archive.org/details/historyofplaneta00dreyuoft</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Heliocentrism at the Encyclopædia Britannica <a href="https://www.britannica.com/EBchecked/topic/260027" target="_blank">https://www.britannica.com/EBchecked/topic/260027</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">According to Lucio Russo, the heliocentric view was expounded in Hipparchus' work on gravity.[3] <a href="/wiki/Lucio_Russo" target="_blank">/wiki/Lucio_Russo</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Dicks, D.R. (1970). Early Greek Astronomy to Aristotle. Ithaca, N.Y.: Cornell University Press. pp. 68. ISBN 978-0-8014-0561-7. <a href="978-0-8014-0561-7" target="_blank">978-0-8014-0561-7</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Debus, Allen G. (1987). Man and nature in the Renaissance. Cambridge University Press. p. 76. ISBN 978-0-521-29328-0. <a href="978-0-521-29328-0" target="_blank">978-0-521-29328-0</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">In Book 1 section 7 he admits that a model in which the Earth revolves with respect to the stars would be simpler but doesn't go as far as considering a heliocentric system. <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Dennis Duke, Ptolemy's Universe Archived July 29, 2012, at the Wayback Machine <a href="http://people.scs.fsu.edu/~dduke/ptolemy.html" target="_blank">http://people.scs.fsu.edu/~dduke/ptolemy.html</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Boyer, C. A History of Mathematics. Wiley, p. 54. <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Kepler, Johannes (1618–1621). Epitome of Copernican Astronomy. Book IV, Part 1.2. <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Eastwood, B. S. (November 1, 1992), "Heraclides and Heliocentrism – Texts Diagrams and Interpretations", Journal for the History of Astronomy, 23 (4): 233, Bibcode:1992JHA....23..233E, doi:10.1177/002182869202300401, S2CID 118643709 <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Neugebauer, Otto E. (1975), A history of ancient mathematical astronomy, Berlin/Heidelberg/New York: Springer, p. 695, ISBN 978-3-540-06995-9 <a href="978-3-540-06995-9" target="_blank">978-3-540-06995-9</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">Rufus, W. Carl (1923), "The astronomical system of Copernicus", Popular Astronomy, 31: 511–512 [512], Bibcode:1923PA.....31..510R <a href="/wiki/Popular_Astronomy_(US_magazine)" target="_blank">/wiki/Popular_Astronomy_(US_magazine)</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Heath (1913, p. 302). The italics and parenthetical comments are as they appear in Heath's original. - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Heath (1913, p. 302). The italics and parenthetical comments are as they appear in Heath's original. - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">That is, an apparent movement of the stars relative to the celestial poles and equator, and to each other, caused by the Earth's revolution around the Sun. <a href="/wiki/Celestial_pole" target="_blank">/wiki/Celestial_pole</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Although it could obviously be reasonably inferred therefrom. <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">Heath (1913, p. 304). Most modern scholars share Heath's opinion that it is Cleanthes in this passage who is being held as having accused Aristarchus of impiety (see Gent & Godwin 1883, p. 240; Dreyer 1953, p. 138; Prickard 1911, p. 20; Cherniss 1957, p. 55; for example). The manuscripts of Plutarch's Concerning the Face Which Appears in the Orb of the Moon that have come down to us are corrupted, however, and the traditional interpretation of the passage has been challenged by Lucio Russo, who insists that it should be interpreted as having Aristarchus rhetorically suggest that Cleanthes was being impious for wanting to shift the Sun from its proper place at the center of the universe (Russo 2013, p. 82; Russo & Medaglia 1996, pp. 113–117). - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Diogenes Laërtius (1972, Bk 7, ch 5, p. 281) <a href="https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0258:book=7:chapter=5&highlight=aristarchus" target="_blank">https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0258:book=7:chapter=5&highlight=aristarchus</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Edwards 1998, p. 68 and n. 104, p. 455, for instance. - Edwards, James (1998), The History and Practice of Ancient Astronomy, Oxford: Oxford University Press, ISBN 978-0-19-509539-5, retrieved July 16, 2018 <a href="https://books.google.com/books?id=nS51_7qbEWsC" target="_blank">https://books.google.com/books?id=nS51_7qbEWsC</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Heath 1913, p. 305. - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Heath 1913, p. 305. - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Dreyer 1953, p. 139. - Dreyer, John Louis Emil (1953) [1906], A History of Astronomy from Thales to Kepler, New York: Dover Publications, ISBN 978-0-486-60079-6 <a href="https://archive.org/details/historyofplaneta00dreyuoft" target="_blank">https://archive.org/details/historyofplaneta00dreyuoft</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Heath 1913, p. 305. - Heath, Sir Thomas (1913). Aristarchus of Samos, the ancient Copernicus; a history of Greek astronomy to Aristarchus, together with Aristarchus's Treatise on the sizes and distances of the sun and moon : a new Greek text with translation and notes. London: Oxford University Press. <a href="https://archive.org/details/aristarchusofsam00heatuoft" target="_blank">https://archive.org/details/aristarchusofsam00heatuoft</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
<li id="fn:25">"Plutarch, Platonicae quaestiones, Question VIII, section 1". www.perseus.tufts.edu. <a href="https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0384%3Achapter%3D8%3Asection%3D1" target="_blank">https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0384%3Achapter%3D8%3Asection%3D1</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></li>
<li id="fn:26">Murdin, Paul, ed. (2000). "Seleucus of Seleucia (c. 190 BC–?)". The Encyclopedia of Astronomy and Astrophysics. p. 3998. Bibcode:2000eaa..bookE3998.. CiteSeerX 10.1.1.255.9251. doi:10.1888/0333750888. ISBN 978-0-333-75088-9. <a href="978-0-333-75088-9" target="_blank">978-0-333-75088-9</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></li>
<li id="fn:27">"Index of Ancient Greek Philosophers-Scientists". Ics.forth.gr. Archived from the original on January 27, 2018. Retrieved November 20, 2018. <a href="https://web.archive.org/web/20180127034924/http://users.ics.forth.gr/~vsiris/ancient_greeks/hellinistic_period.html" target="_blank">https://web.archive.org/web/20180127034924/http://users.ics.forth.gr/~vsiris/ancient_greeks/hellinistic_period.html</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></li>
<li id="fn:28">Bartel, B. L. (1987), "The Heliocentric System in Greek, Persian and Hindu Astronomy", Annals of the New York Academy of Sciences, 500 (1): 525–545 [527–529], Bibcode:1987NYASA.500..525V, doi:10.1111/j.1749-6632.1987.tb37224.x, S2CID 222087224. <a href="/wiki/Bartel_Leendert_van_der_Waerden" target="_blank">/wiki/Bartel_Leendert_van_der_Waerden</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></li>
<li id="fn:29">Pines, Shlomo (1986), Studies in Arabic versions of Greek texts and in mediaeval science, vol. 2, Brill Publishers, pp. viii & 201–217, ISBN 978-965-223-626-5 <a href="978-965-223-626-5" target="_blank">978-965-223-626-5</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></li>
<li id="fn:30">Lucio Russo, Flussi e riflussi, Feltrinelli, Milano, 2003, ISBN 88-07-10349-4. <a href="/wiki/Lucio_Russo" target="_blank">/wiki/Lucio_Russo</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></li>
<li id="fn:31">William Stahl, trans., Martianus Capella and the Seven Liberal Arts, vol. 2, The Marriage of Philology and Mercury, 854, 857, New York: Columbia Univ. Pr, 1977, pp. 332–333 <a href="/wiki/William_Harris_Stahl" target="_blank">/wiki/William_Harris_Stahl</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></li>
<li id="fn:32">Eastwood, Bruce S. (2007), Ordering the Heavens: Roman Astronomy and Cosmology in the Carolingian Renaissance, Leiden: Brill, pp. 244–259, ISBN 978-90-04-16186-3 <a href="978-90-04-16186-3" target="_blank">978-90-04-16186-3</a> <a href="#fnref:32" class="footnote-back-ref">↩</a></li>
<li id="fn:33">Eastwood, Bruce S. (1982), "Kepler as Historian of Science: Precursors of Copernican Heliocentrism according to De revolutionibus I, 10", Proceedings of the American Philosophical Society, 126: 367–394. <a href="#fnref:33" class="footnote-back-ref">↩</a></li>
<li id="fn:34">Carman, Christián C. (December 23, 2017). "The first Copernican was Copernicus: the difference between Pre-Copernican and Copernican heliocentrism". Archive for History of Exact Sciences. 72 (1): 1–20. doi:10.1007/s00407-017-0198-3. hdl:11336/72174. ISSN 0003-9519. <a href="https://dx.doi.org/10.1007/s00407-017-0198-3" target="_blank">https://dx.doi.org/10.1007/s00407-017-0198-3</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></li>
<li id="fn:35">Thurston 1993, p. 188. - Thurston, Hugh (1993). Early Astronomy. New York: Springer-Verlag. ISBN 978-0-387-94107-3. <a href="#fnref:35" class="footnote-back-ref">↩</a></li>
<li id="fn:36">Carman, Christián C. (December 23, 2017). "The first Copernican was Copernicus: the difference between Pre-Copernican and Copernican heliocentrism". Archive for History of Exact Sciences. 72 (1): 1–20. doi:10.1007/s00407-017-0198-3. hdl:11336/72174. ISSN 0003-9519. <a href="https://dx.doi.org/10.1007/s00407-017-0198-3" target="_blank">https://dx.doi.org/10.1007/s00407-017-0198-3</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></li>
<li id="fn:37">Plofker, Kim (2009). Mathematics in India. Princeton: Princeton University Press. pp. 111–112. ISBN 978-1-4008-3407-5. OCLC 650305544. <a href="978-1-4008-3407-5" target="_blank">978-1-4008-3407-5</a> <a href="#fnref:37" class="footnote-back-ref">↩</a></li>
<li id="fn:38">The concept of Indian heliocentrism has been advocated by B. L. van der Waerden, Das heliozentrische System in der griechischen, persischen und indischen Astronomie. Naturforschenden Gesellschaft in Zürich. Zürich:Kommissionsverlag Leeman AG, 1970. <a href="#fnref:38" class="footnote-back-ref">↩</a></li>
<li id="fn:39">B.L. van der Waerden, "The Heliocentric System in Greek, Persian and Hindu Astronomy", in David A. King and George Saliba, ed., From Deferent to Equant: A Volume of Studies in the History of Science in the Ancient and Medieval Near East in Honor of E. S. Kennedy, Annals of the New York Academy of Science, 500 (1987), pp. 529–534. <a href="#fnref:39" class="footnote-back-ref">↩</a></li>
<li id="fn:40">Noel Swerdlow, "Review: A Lost Monument of Indian Astronomy," Isis, 64 (1973): 239–243. <a href="#fnref:40" class="footnote-back-ref">↩</a></li>
<li id="fn:41">Kim Plofker (2009). Mathematics in India. Princeton, NJ: Princeton University Press. p. 111. ISBN 978-0-691-12067-6. <a href="978-0-691-12067-6" target="_blank">978-0-691-12067-6</a> <a href="#fnref:41" class="footnote-back-ref">↩</a></li>
<li id="fn:42">Joseph 2000, pp. 393–394, 408. - Joseph, George G. (2000). The Crest of the Peacock: Non-European Roots of Mathematics (2nd ed.). London: Penguin Books. ISBN 0-691-00659-8. <a href="https://archive.org/details/crestofpeacockno00jose" target="_blank">https://archive.org/details/crestofpeacockno00jose</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></li>
<li id="fn:43">Sabra 1998, pp. 317f: All Islamic astronomers from Thabit ibn Qurra in the ninth century to Ibn al-Shatir in the fourteenth, and all natural philosophers from al-Kindi to Averroes and later, are known to have accepted ... the Greek picture of the world as consisting of two spheres of which one, the celestial sphere ... concentrically envelops the other. - Sabra, A. I. (1998). "Configuring the Universe: Aporetic, Problem Solving, and Kinematic Modeling as Themes of Arabic Astronomy". Perspectives on Science. 6 (3): 288–330. doi:10.1162/posc_a_00552. S2CID 117426616. <a href="https://doi.org/10.1162%2Fposc_a_00552" target="_blank">https://doi.org/10.1162%2Fposc_a_00552</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></li>
<li id="fn:44">"Al-Battani". Famous Scientists. Retrieved November 20, 2018. <a href="https://www.famousscientists.org/al-battani/" target="_blank">https://www.famousscientists.org/al-battani/</a> <a href="#fnref:44" class="footnote-back-ref">↩</a></li>
<li id="fn:45">Alessandro Bausani (1973). "Cosmology and Religion in Islam". Scientia/Rivista di Scienza. 108 (67): 762. <a href="#fnref:45" class="footnote-back-ref">↩</a></li>
<li id="fn:46">Young, M. J. L., ed. (2006). Religion, Learning and Science in the 'Abbasid Period. Cambridge University Press. p. 413. ISBN 978-0-521-02887-5. <a href="978-0-521-02887-5" target="_blank">978-0-521-02887-5</a> <a href="#fnref:46" class="footnote-back-ref">↩</a></li>
<li id="fn:47">Young, M. J. L., ed. (2006). Religion, Learning and Science in the 'Abbasid Period. Cambridge University Press. p. 413. ISBN 978-0-521-02887-5. <a href="978-0-521-02887-5" target="_blank">978-0-521-02887-5</a> <a href="#fnref:47" class="footnote-back-ref">↩</a></li>
<li id="fn:48">Nasr, Seyyed Hossein (1993). An Introduction to Islamic Cosmological Doctrines. SUNY Press. p. 135. ISBN 978-1-4384-1419-5. <a href="978-1-4384-1419-5" target="_blank">978-1-4384-1419-5</a> <a href="#fnref:48" class="footnote-back-ref">↩</a></li>
<li id="fn:49">Hoskin, Michael (1999). The Cambridge Concise History of Astronomy. Cambridge University Press. p. 60. ISBN 978-0-521-57600-0. <a href="978-0-521-57600-0" target="_blank">978-0-521-57600-0</a> <a href="#fnref:49" class="footnote-back-ref">↩</a></li>
<li id="fn:50">Qadir 1989, pp. 5–10.. - Qadir, Asghar (1989). Relativity: An introduction to the special theory. Singapore Teaneck, NJ: World Scientific. ISBN 9971-5-0612-2. OCLC 841809663. <a href="https://search.worldcat.org/oclc/841809663" target="_blank">https://search.worldcat.org/oclc/841809663</a> <a href="#fnref:50" class="footnote-back-ref">↩</a></li>
<li id="fn:51">Nicolaus Copernicus, Stanford Encyclopedia of Philosophy (2004). <a href="http://setis.library.usyd.edu.au/stanford/entries/copernicus/index.html" target="_blank">http://setis.library.usyd.edu.au/stanford/entries/copernicus/index.html</a> <a href="#fnref:51" class="footnote-back-ref">↩</a></li>
<li id="fn:52">Covington, Richard. "Rediscovering Arabic Science". Aramco World. Retrieved November 20, 2018. <a href="http://archive.aramcoworld.com/issue/200703/rediscovering.arabic.science.htm" target="_blank">http://archive.aramcoworld.com/issue/200703/rediscovering.arabic.science.htm</a> <a href="#fnref:52" class="footnote-back-ref">↩</a></li>
<li id="fn:53">E. S. Kennedy, "Al-Bīrūnī's Masudic Canon", Al-Abhath, 24 (1971): 59–81; reprinted in David A. King and Mary Helen Kennedy, ed., Studies in the Islamic Exact Sciences, Beirut, 1983, pp. 573–595. <a href="#fnref:53" class="footnote-back-ref">↩</a></li>
<li id="fn:54">G. Wiet, V. Elisseeff, P. Wolff, J. Naudu (1975). History of Mankind, Vol 3: The Great medieval Civilisations, p. 649. George Allen & Unwin Ltd, UNESCO. <a href="/wiki/UNESCO" target="_blank">/wiki/UNESCO</a> <a href="#fnref:54" class="footnote-back-ref">↩</a></li>
<li id="fn:55">Young, M. J. L., ed. (2006). Religion, Learning and Science in the 'Abbasid Period. Cambridge University Press. p. 413. ISBN 978-0-521-02887-5. <a href="978-0-521-02887-5" target="_blank">978-0-521-02887-5</a> <a href="#fnref:55" class="footnote-back-ref">↩</a></li>
<li id="fn:56">Saliba 1999. - Saliba, George (1999). "Whose Science is Arabic Science in Renaissance Europe?". Columbia University. <a href="http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html" target="_blank">http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html</a> <a href="#fnref:56" class="footnote-back-ref">↩</a></li>
<li id="fn:57">Samsó, Julio (2007). "Biṭrūjī: Nūr al-Dīn Abū Isḥāq [Abū Jaʿfar] Ibrāhīm ibn Yūsuf al-Biṭrūjī". In Thomas Hockey; et al. (eds.). The Biographical Encyclopedia of Astronomers. New York: Springer. pp. 133–134. ISBN 978-0-387-31022-0. (PDF version) <a href="978-0-387-31022-0" target="_blank">978-0-387-31022-0</a> <a href="#fnref:57" class="footnote-back-ref">↩</a></li>
<li id="fn:58">Samsó, Julio (1970–80). "Al-Bitruji Al-Ishbili, Abu Ishaq". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. ISBN 978-0-684-10114-9. <a href="978-0-684-10114-9" target="_blank">978-0-684-10114-9</a> <a href="#fnref:58" class="footnote-back-ref">↩</a></li>
<li id="fn:59">Samsó, Julio (1970–80). "Al-Bitruji Al-Ishbili, Abu Ishaq". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. ISBN 978-0-684-10114-9. <a href="978-0-684-10114-9" target="_blank">978-0-684-10114-9</a> <a href="#fnref:59" class="footnote-back-ref">↩</a></li>
<li id="fn:60">Hikmat al-'Ain, p. 78 <a href="https://archive.org/details/Hikmat3ayn" target="_blank">https://archive.org/details/Hikmat3ayn</a> <a href="#fnref:60" class="footnote-back-ref">↩</a></li>
<li id="fn:61">Ragep, F. Jamil (2001a), "Tusi and Copernicus: The Earth's Motion in Context", Science in Context, 14 (1–2): 145–163, doi:10.1017/s0269889701000060, S2CID 145372613 <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:61" class="footnote-back-ref">↩</a></li>
<li id="fn:62">Ragep, F. Jamil; Al-Qushji, Ali (2001b), "Freeing Astronomy from Philosophy: An Aspect of Islamic Influence on Science", Osiris, 2nd Series, 16 (Science in Theistic Contexts: Cognitive Dimensions): 49–64 & 66–71, Bibcode:2001Osir...16...49R, doi:10.1086/649338, S2CID 142586786 <a href="http://digitool.library.mcgill.ca:80/R/?func=dbin-jump-full&object_id=156332" target="_blank">http://digitool.library.mcgill.ca:80/R/?func=dbin-jump-full&object_id=156332</a> <a href="#fnref:62" class="footnote-back-ref">↩</a></li>
<li id="fn:63">Huff, Toby E. (2003). The Rise of Early Modern Science: Islam, China and the West. The Rise of Early Modern Science: Islam, China, and the West. Cambridge University Press. ISBN 978-0-521-52994-5. <a href="978-0-521-52994-5" target="_blank">978-0-521-52994-5</a> <a href="#fnref:63" class="footnote-back-ref">↩</a></li>
<li id="fn:64">Joseph 2000. - Joseph, George G. (2000). The Crest of the Peacock: Non-European Roots of Mathematics (2nd ed.). London: Penguin Books. ISBN 0-691-00659-8. <a href="https://archive.org/details/crestofpeacockno00jose" target="_blank">https://archive.org/details/crestofpeacockno00jose</a> <a href="#fnref:64" class="footnote-back-ref">↩</a></li>
<li id="fn:65">Ramasubramanian, K. (1998). "Model of planetary motion in the works of Kerala astronomers". Bulletin of the Astronomical Society of India. 26: 11–31 [23–24]. Bibcode:1998BASI...26...11R. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:65" class="footnote-back-ref">↩</a></li>
<li id="fn:66">Ramasubramanian, Srinivas & Sriram 1994, p. 788. - Ramasubramanian, K.; Srinivas, M. D.; Sriram, M. S. (1994). "Modification of the earlier Indian planetary theory by the Kerala astronomers (c. 1500 AD) and the implied heliocentric picture of planetary motion". Current Science. 66: 784–790. <a href="#fnref:66" class="footnote-back-ref">↩</a></li>
<li id="fn:67">Dutta, Amartya Kumar (May 2006), "Āryabhata and axial rotation of earth", Resonance, 11 (5): 58–72 [70–71], doi:10.1007/BF02839373, ISSN 0973-712X, S2CID 118434268 <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:67" class="footnote-back-ref">↩</a></li>
<li id="fn:68">Joseph 2000, p. 408. - Joseph, George G. (2000). The Crest of the Peacock: Non-European Roots of Mathematics (2nd ed.). London: Penguin Books. ISBN 0-691-00659-8. <a href="https://archive.org/details/crestofpeacockno00jose" target="_blank">https://archive.org/details/crestofpeacockno00jose</a> <a href="#fnref:68" class="footnote-back-ref">↩</a></li>
<li id="fn:69">Ramasubramanian, K.; Srinivas, M. D.; Sriram, M. S. (1994). "Modification of the earlier Indian planetary theory by the Kerala astronomers (c. 1500 AD) and the implied heliocentric picture of planetary motion". Current Science. 66: 784–790. <a href="/wiki/Current_Science" target="_blank">/wiki/Current_Science</a> <a href="#fnref:69" class="footnote-back-ref">↩</a></li>
<li id="fn:70">William Stahl, trans., Martianus Capella and the Seven Liberal Arts, vol. 2, The Marriage of Philology and Mercury, 854, 857, New York: Columbia Univ. Pr, 1977, pp. 332–333 <a href="/wiki/William_Harris_Stahl" target="_blank">/wiki/William_Harris_Stahl</a> <a href="#fnref:70" class="footnote-back-ref">↩</a></li>
<li id="fn:71">Eastwood, Bruce S. (2007), Ordering the Heavens: Roman Astronomy and Cosmology in the Carolingian Renaissance, Leiden: Brill, pp. 244–259, ISBN 978-90-04-16186-3 <a href="978-90-04-16186-3" target="_blank">978-90-04-16186-3</a> <a href="#fnref:71" class="footnote-back-ref">↩</a></li>
<li id="fn:72">Eastwood, Bruce S. (1982), "Kepler as Historian of Science: Precursors of Copernican Heliocentrism according to De revolutionibus I, 10", Proceedings of the American Philosophical Society, 126: 367–394. <a href="#fnref:72" class="footnote-back-ref">↩</a></li>
<li id="fn:73">Carman, Christián C. (December 23, 2017). "The first Copernican was Copernicus: the difference between Pre-Copernican and Copernican heliocentrism". Archive for History of Exact Sciences. 72 (1): 1–20. doi:10.1007/s00407-017-0198-3. hdl:11336/72174. ISSN 0003-9519. <a href="https://dx.doi.org/10.1007/s00407-017-0198-3" target="_blank">https://dx.doi.org/10.1007/s00407-017-0198-3</a> <a href="#fnref:73" class="footnote-back-ref">↩</a></li>
<li id="fn:74">Carman, Christián C. (December 23, 2017). "The first Copernican was Copernicus: the difference between Pre-Copernican and Copernican heliocentrism". Archive for History of Exact Sciences. 72 (1): 1–20. doi:10.1007/s00407-017-0198-3. hdl:11336/72174. ISSN 0003-9519. <a href="https://dx.doi.org/10.1007/s00407-017-0198-3" target="_blank">https://dx.doi.org/10.1007/s00407-017-0198-3</a> <a href="#fnref:74" class="footnote-back-ref">↩</a></li>
<li id="fn:75">Nicholas of Cusa, De docta ignorantia, 2.12, p. 103, cited in Koyré (1957), p. 17. <a href="#fnref:75" class="footnote-back-ref">↩</a></li>
<li id="fn:76">van Limpt, Cokky (February 17, 2003). "Favourite quote of founder Joost R. Ritman: God is an infinite sphere". Bibliotheca Philosophica Hermetica. Archived from the original on November 27, 2018. Retrieved November 27, 2018. <a href="https://web.archive.org/web/20181127193503/https://www.ritmanlibrary.com/founder/god-is-an-infinite-sphere/" target="_blank">https://web.archive.org/web/20181127193503/https://www.ritmanlibrary.com/founder/god-is-an-infinite-sphere/</a> <a href="#fnref:76" class="footnote-back-ref">↩</a></li>
<li id="fn:77">Saliba 1999. - Saliba, George (1999). "Whose Science is Arabic Science in Renaissance Europe?". Columbia University. <a href="http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html" target="_blank">http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html</a> <a href="#fnref:77" class="footnote-back-ref">↩</a></li>
<li id="fn:78">Roberts, V.; Kennedy, E. S. (1959). "The Planetary Theory of Ibn al-Shatir". Isis. 50 (3): 232–234. doi:10.1086/348774. S2CID 143592051. <a href="/wiki/Isis_(journal)" target="_blank">/wiki/Isis_(journal)</a> <a href="#fnref:78" class="footnote-back-ref">↩</a></li>
<li id="fn:79">Guessoum, N. (June 2008), "Copernicus and Ibn Al-Shatir: does the Copernican revolution have Islamic roots?", The Observatory, 128: 231–239 [238], Bibcode:2008Obs...128..231G <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:79" class="footnote-back-ref">↩</a></li>
<li id="fn:80">Sabra 1998. - Sabra, A. I. (1998). "Configuring the Universe: Aporetic, Problem Solving, and Kinematic Modeling as Themes of Arabic Astronomy". Perspectives on Science. 6 (3): 288–330. doi:10.1162/posc_a_00552. S2CID 117426616. <a href="https://doi.org/10.1162%2Fposc_a_00552" target="_blank">https://doi.org/10.1162%2Fposc_a_00552</a> <a href="#fnref:80" class="footnote-back-ref">↩</a></li>
<li id="fn:81">Kennedy, E. S. (Autumn 1966), "Late Medieval Planetary Theory", Isis, 57 (3): 365–378 [377], doi:10.1086/350144, JSTOR 228366, S2CID 143569912 <a href="/wiki/Isis_(journal)" target="_blank">/wiki/Isis_(journal)</a> <a href="#fnref:81" class="footnote-back-ref">↩</a></li>
<li id="fn:82">Saliba, George (1995). A History of Arabic Astronomy: Planetary Theories During the Golden Age of Islam. NYU Press. ISBN 978-0-8147-8023-7. <a href="978-0-8147-8023-7" target="_blank">978-0-8147-8023-7</a> <a href="#fnref:82" class="footnote-back-ref">↩</a></li>
<li id="fn:83">Swerdlow, Noel M. (December 31, 1973). "The Derivation and First Draft of Copernicus's Planetary Theory: A Translation of the Commentariolus with Commentary". Proceedings of the American Philosophical Society. 117 (6): 424. Bibcode:1973PAPhS.117..423S. ISSN 0003-049X. JSTOR 986461. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:83" class="footnote-back-ref">↩</a></li>
<li id="fn:84">King, David A. (2007). "Ibn al-Shāṭir: ʿAlāʾ al-Dīn ʿAlī ibn Ibrāhīm". In Thomas Hockey; et al. (eds.). The Biographical Encyclopedia of Astronomers. New York: Springer. pp. 569–570. ISBN 978-0-387-31022-0. (PDF version) <a href="978-0-387-31022-0" target="_blank">978-0-387-31022-0</a> <a href="#fnref:84" class="footnote-back-ref">↩</a></li>
<li id="fn:85">Huff, Toby E. (2003). The Rise of Early Modern Science: Islam, China and the West. The Rise of Early Modern Science: Islam, China, and the West. Cambridge University Press. ISBN 978-0-521-52994-5. <a href="978-0-521-52994-5" target="_blank">978-0-521-52994-5</a> <a href="#fnref:85" class="footnote-back-ref">↩</a></li>
<li id="fn:86">N.K. Singh, M. Zaki Kirmani,Encyclopaedia of Islamic science and scientists[1] <a href="https://books.google.com/books?id=lKa9khFcKmQC&q=geocentric&pg=PA808" target="_blank">https://books.google.com/books?id=lKa9khFcKmQC&q=geocentric&pg=PA808</a> <a href="#fnref:86" class="footnote-back-ref">↩</a></li>
<li id="fn:87">Viktor Blåsjö, "A Critique of the Arguments for Maragha Influence on Copernicus", Journal for the History of Astronomy, 45 (2014), 183–195 ADS <a href="http://adsabs.harvard.edu/abs/2014JHA....45..183B" target="_blank">http://adsabs.harvard.edu/abs/2014JHA....45..183B</a> <a href="#fnref:87" class="footnote-back-ref">↩</a></li>
<li id="fn:88">Saliba, George (April 27, 2006). "Islamic Science and the Making of Renaissance Europe". Library of Congress. Retrieved March 1, 2008. <a href="/wiki/George_Saliba" target="_blank">/wiki/George_Saliba</a> <a href="#fnref:88" class="footnote-back-ref">↩</a></li>
<li id="fn:89">"Nasir al-Dīn al-Ṭūsī – the Mathematics Genealogy Project". <a href="https://www.genealogy.math.ndsu.nodak.edu/id.php?id=217509" target="_blank">https://www.genealogy.math.ndsu.nodak.edu/id.php?id=217509</a> <a href="#fnref:89" class="footnote-back-ref">↩</a></li>
<li id="fn:90">Cook, Theodore Andrea (1914). The Curves of Life. London: Constable and Company Ltd. p. 390. <a href="/wiki/Theodore_Andrea_Cook" target="_blank">/wiki/Theodore_Andrea_Cook</a> <a href="#fnref:90" class="footnote-back-ref">↩</a></li>
<li id="fn:91">"Nasir al-Dīn al-Ṭūsī – the Mathematics Genealogy Project". <a href="https://www.genealogy.math.ndsu.nodak.edu/id.php?id=217509" target="_blank">https://www.genealogy.math.ndsu.nodak.edu/id.php?id=217509</a> <a href="#fnref:91" class="footnote-back-ref">↩</a></li>
<li id="fn:92">Claudia Kren, "The Rolling Device," p. 497. <a href="#fnref:92" class="footnote-back-ref">↩</a></li>
<li id="fn:93">Saliba 1999. - Saliba, George (1999). "Whose Science is Arabic Science in Renaissance Europe?". Columbia University. <a href="http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html" target="_blank">http://www.columbia.edu/~gas1/project/visions/case1/sci.1.html</a> <a href="#fnref:93" class="footnote-back-ref">↩</a></li>
<li id="fn:94">Goddu 2010, pp. 261–69, 476–86. - Goddu, André (2010). Copernicus and the Aristotelian tradition. Leiden, Netherlands: Brill. ISBN 978-90-04-18107-6. <a href="#fnref:94" class="footnote-back-ref">↩</a></li>
<li id="fn:95">Huff, T.E. (2010). Intellectual Curiosity and the Scientific Revolution: A Global Perspective. Cambridge University Press. p. 263. ISBN 978-1-139-49535-6. Retrieved October 31, 2020. <a href="978-1-139-49535-6" target="_blank">978-1-139-49535-6</a> <a href="#fnref:95" class="footnote-back-ref">↩</a></li>
<li id="fn:96">di Bono 1995. - di Bono, Mario (1995). "Copernicus, Amico, Fracastoro and Ṭūsï's Device: Observations on the Use and Transmission of a Model". Journal for the History of Astronomy. xxvi (2): 133–54. Bibcode:1995JHA....26..133D. doi:10.1177/002182869502600203. S2CID 118330488. <a href="https://ui.adsabs.harvard.edu/abs/1995JHA....26..133D" target="_blank">https://ui.adsabs.harvard.edu/abs/1995JHA....26..133D</a> <a href="#fnref:96" class="footnote-back-ref">↩</a></li>
<li id="fn:97">Veselovsky 1973. - Veselovsky, I. N. (1973), "Copernicus and Nasir al-Din al-Tusi", Journal for the History of Astronomy, 4 (2): 128–130, Bibcode:1973JHA.....4..128V, doi:10.1177/002182867300400205, S2CID 118453340. <a href="http://articles.adsabs.harvard.edu/full/seri/JHA../0004//0000128.000.html" target="_blank">http://articles.adsabs.harvard.edu/full/seri/JHA../0004//0000128.000.html</a> <a href="#fnref:97" class="footnote-back-ref">↩</a></li>
<li id="fn:98">Freely, John (2015). Light from the East: How the Science of Medieval Islam Helped to Shape the Western World. I.B. Tauris. p. 179. ISBN 978-1-78453-138-6. <a href="978-1-78453-138-6" target="_blank">978-1-78453-138-6</a> <a href="#fnref:98" class="footnote-back-ref">↩</a></li>
<li id="fn:99">Veselovsky, I. N. (1973), "Copernicus and Nasir al-Din al-Tusi", Journal for the History of Astronomy, 4 (2): 128–130, Bibcode:1973JHA.....4..128V, doi:10.1177/002182867300400205, S2CID 118453340. <a href="http://articles.adsabs.harvard.edu/full/seri/JHA../0004//0000128.000.html" target="_blank">http://articles.adsabs.harvard.edu/full/seri/JHA../0004//0000128.000.html</a> <a href="#fnref:99" class="footnote-back-ref">↩</a></li>
<li id="fn:100">Neugebauer, Otto (1975), A History of Ancient Mathematical Astronomy, vol. 2, Berlin / Heidelberg / New York: Springer-Verlag, p. 1035, ISBN 978-0-387-06995-1 <a href="978-0-387-06995-1" target="_blank">978-0-387-06995-1</a> <a href="#fnref:100" class="footnote-back-ref">↩</a></li>
<li id="fn:101">Kren, Claudia (1971), "The Rolling Device of Naṣir al-Dīn al-Ṭūsī in the De spera of Nicole Oresme", Isis, 62 (4): 490–498, doi:10.1086/350791, S2CID 144526697. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:101" class="footnote-back-ref">↩</a></li>
<li id="fn:102">Koestler 1990, p. 212. - Koestler, Arthur (1990) [1959]. The Sleepwalkers: A history of man's changing vision of the universe. London: Penguin Books. ISBN 978-0-14-019246-9. <a href="#fnref:102" class="footnote-back-ref">↩</a></li>
<li id="fn:103">Henry, John (2001). Moving heaven and earth : Copernicus and the solar system. Cambridge: Icon. p. 87. ISBN 978-1-84046-251-7. <a href="978-1-84046-251-7" target="_blank">978-1-84046-251-7</a> <a href="#fnref:103" class="footnote-back-ref">↩</a></li>
<li id="fn:104">Gingerich 2004, p. 51. - Gingerich, Owen (2004). The Book Nobody Read. London: William Heinemann. ISBN 978-0-434-01315-9. <a href="#fnref:104" class="footnote-back-ref">↩</a></li>
<li id="fn:105">Gingerich, O. "Did Copernicus Owe a Debt to Aristarchus?" Journal for the History of Astronomy, Vol.16, No.1/Feb, P. 37, 1985. Philolaus had the Earth moving around a Central Fire which was not the Sun, so Copernicus's reference to Aristarchus's model as possibly geodynamic does not necessarily imply that he thought it was heliocentric. <a href="#fnref:105" class="footnote-back-ref">↩</a></li>
<li id="fn:106">A library catalogue of a 16th-century historian, Matthew of Miechow, bears that date and contains a reference to the manuscript, so it must have begun circulating before that date (Koyré 1973, p. 85; Gingerich 2004, p. 32). - Koyré, Alexandre (1973). The Astronomical Revolution: Copernicus – Kepler – Borelli. Ithaca, NY: Cornell University Press. ISBN 978-0-8014-0504-4. <a href="#fnref:106" class="footnote-back-ref">↩</a></li>
<li id="fn:107">Speller 2008, p. 51. - Speller, Jules (2008). Galileo's Inquisition Trial Revisited. Frankfurt am Main: Peter Lang. ISBN 978-3-631-56229-1. <a href="https://books.google.com/books?id=jviElHq-kEcC" target="_blank">https://books.google.com/books?id=jviElHq-kEcC</a> <a href="#fnref:107" class="footnote-back-ref">↩</a></li>
<li id="fn:108">"Religious Objections to Copernicus". www.astronomy.ohio-state.edu. <a href="https://www.astronomy.ohio-state.edu/pogge.1/Ast161/Unit3/response.html" target="_blank">https://www.astronomy.ohio-state.edu/pogge.1/Ast161/Unit3/response.html</a> <a href="#fnref:108" class="footnote-back-ref">↩</a></li>
<li id="fn:109">Melanchthon (1549). Elements of Physics. <a href="#fnref:109" class="footnote-back-ref">↩</a></li>
<li id="fn:110">Cohen, I. Bernard. Revolution in Science. p. 497. <a href="#fnref:110" class="footnote-back-ref">↩</a></li>
<li id="fn:111">Rosen 1995, p. 159. Rosen disputes the earlier conclusion of another scholar that this was referring specifically to Copernicus' theory. According to Rosen, Calvin had very likely never heard of Copernicus and was referring instead to "the traditional geokinetic cosmology". - Rosen, Edward (1995). Copernicus and his Successors. London: Hambledon Press. Bibcode:1995cops.book.....R. ISBN 978-1-85285-071-5. <a href="https://ui.adsabs.harvard.edu/abs/1995cops.book.....R" target="_blank">https://ui.adsabs.harvard.edu/abs/1995cops.book.....R</a> <a href="#fnref:111" class="footnote-back-ref">↩</a></li>
<li id="fn:112">On the other hand, Calvin is not responsible for another famous quotation which has often been misattributed to him: "Who will venture to place the authority of Copernicus above that of the Holy Spirit?" It has long been established that this line cannot be found in any of Calvin's works.[97][98][99] It has been suggested that the quotation was originally sourced from the works of Lutheran theologian Abraham Calovius.[100] <a href="#fnref:112" class="footnote-back-ref">↩</a></li>
<li id="fn:113">Gingerich, Owen (1993). The eye of heaven: Ptolemy, Copernicus, Kepler. New York: American Institute of Physics. p. 181. ISBN 0-88318-863-5. OCLC 24247242. <a href="0-88318-863-5" target="_blank">0-88318-863-5</a> <a href="#fnref:113" class="footnote-back-ref">↩</a></li>
<li id="fn:114">Blair, Ann, "Tycho Brahe's critique of Copernicus and the Copernican system", Journal of the History of Ideas, 51, 1990, 364. <a href="#fnref:114" class="footnote-back-ref">↩</a></li>
<li id="fn:115">Gingerich, O. & Voelkel, J. R., J. Hist. Astron., Vol. 29, 1998, pp. 1, 24 <a href="http://adsabs.harvard.edu/abs/1998JHA....29....1G#" target="_blank">http://adsabs.harvard.edu/abs/1998JHA....29....1G#</a> <a href="#fnref:115" class="footnote-back-ref">↩</a></li>
<li id="fn:116">Fantoli 2003, p. 109. - Fantoli, Annibale (2003). Galileo, for Copernicanism and for the church. Translated by Coyne, George V. (3rd English ed.). Notre Dame, IN: Vatican Observatory Publications / University of Notre Dame Press. ISBN 88-209-7427-4. OCLC 52897897. <a href="https://search.worldcat.org/oclc/52897897" target="_blank">https://search.worldcat.org/oclc/52897897</a> <a href="#fnref:116" class="footnote-back-ref">↩</a></li>
<li id="fn:117">Smith 1952, pp. 310–311. - Smith, Homer W. (1952). Man and His Gods. New York: Grosset & Dunlap. pp. 310–311. <a href="https://archive.org/details/manhisgods00smit" target="_blank">https://archive.org/details/manhisgods00smit</a> <a href="#fnref:117" class="footnote-back-ref">↩</a></li>
<li id="fn:118">Alessandro De Angelis and Catarina Espirito Santo (2015), "The contribution of Giordano Bruno to the principle of relativity" (PDF), Journal of Astronomical History and Heritage, 18 (3): 241–248, arXiv:1504.01604, Bibcode:2015JAHH...18..241D, doi:10.3724/SP.J.1440-2807.2015.03.02, S2CID 118420438, archived from the original (PDF) on January 26, 2016, retrieved January 19, 2016 <a href="/wiki/Alessandro_De_Angelis_(astrophysicist)" target="_blank">/wiki/Alessandro_De_Angelis_(astrophysicist)</a> <a href="#fnref:118" class="footnote-back-ref">↩</a></li>
<li id="fn:119">Giordano Bruno, Teofilo, in La Cena de le Ceneri, "Third Dialogue", (1584), ed. and trans. by S.L. Jaki (1975). <a href="#fnref:119" class="footnote-back-ref">↩</a></li>
<li id="fn:120">David P., Stern (October 10, 2016). "Kepler and His Laws". From Stargazers to Starships. Retrieved September 5, 2019. <a href="http://www.phy6.org/stargaze/Skeplaws.htm" target="_blank">http://www.phy6.org/stargaze/Skeplaws.htm</a> <a href="#fnref:120" class="footnote-back-ref">↩</a></li>
<li id="fn:121">Koestler 1990, p. 338: "I laid [the original equation] aside, and fell back on ellipses, believing that this was quite a different hypothesis, whereas the two ... are one in [sic] the same... " - Koestler, Arthur (1990) [1959]. The Sleepwalkers: A history of man's changing vision of the universe. London: Penguin Books. ISBN 978-0-14-019246-9. <a href="#fnref:121" class="footnote-back-ref">↩</a></li>
<li id="fn:122">Smith 1952. - Smith, Homer W. (1952). Man and His Gods. New York: Grosset & Dunlap. pp. 310–311. <a href="https://archive.org/details/manhisgods00smit" target="_blank">https://archive.org/details/manhisgods00smit</a> <a href="#fnref:122" class="footnote-back-ref">↩</a></li>
<li id="fn:123">Smith 1952. - Smith, Homer W. (1952). Man and His Gods. New York: Grosset & Dunlap. pp. 310–311. <a href="https://archive.org/details/manhisgods00smit" target="_blank">https://archive.org/details/manhisgods00smit</a> <a href="#fnref:123" class="footnote-back-ref">↩</a></li>
<li id="fn:124">Koestler 1990, p. 433. - Koestler, Arthur (1990) [1959]. The Sleepwalkers: A history of man's changing vision of the universe. London: Penguin Books. ISBN 978-0-14-019246-9. <a href="#fnref:124" class="footnote-back-ref">↩</a></li>
<li id="fn:125">Langford 1998, pp. 56–57. - Langford, Jerome K. (1998) [1966]. Galileo, Science and the Church (3rd ed.). St. Augustine's Press. ISBN 978-1-890318-25-3. <a href="#fnref:125" class="footnote-back-ref">↩</a></li>
<li id="fn:126">Drake 1978, p. 240. - Drake, Stillman (1978). Galileo At Work. Chicago: University of Chicago Press. ISBN 978-0-226-16226-3. <a href="https://archive.org/details/galileoatwork00stil" target="_blank">https://archive.org/details/galileoatwork00stil</a> <a href="#fnref:126" class="footnote-back-ref">↩</a></li>
<li id="fn:127">Sharratt 1994, pp. 110–111. - Sharratt, Michael (1994). Galileo: Decisive Innovator. Cambridge: Cambridge University Press. ISBN 978-0-521-56671-1. <a href="#fnref:127" class="footnote-back-ref">↩</a></li>
<li id="fn:128">Favaro 1907, pp. 297–298. (in Italian). - Favaro, Antonio [in Italian], ed. (1907). Le Opere di Galileo Galilei, Edizione Nazionale [The Works of Galileo Galilei, National Edition] (in Italian). Vol. 19. Florence: Barbera. ISBN 978-88-09-20881-0. Archived from the original on July 13, 2007. <a href="https://web.archive.org/web/20070713092939/http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO" target="_blank">https://web.archive.org/web/20070713092939/http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO</a> <a href="#fnref:128" class="footnote-back-ref">↩</a></li>
<li id="fn:129">Sharratt 1994, pp. 110–115. - Sharratt, Michael (1994). Galileo: Decisive Innovator. Cambridge: Cambridge University Press. ISBN 978-0-521-56671-1. <a href="#fnref:129" class="footnote-back-ref">↩</a></li>
<li id="fn:130">Graney 2015, pp. 68–69 Ingoli's essay was published in English translation for the first time in 2015. - Graney, Christopher M. (2015), Setting Aside All Authority: Giovanni Battista Riccioli and the Science against Copernicus in the Age of Galileo, University of Notre Dame Press, Bibcode:2015saaa.book.....G, ISBN 978-0-268-02988-3 <a href="https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G" target="_blank">https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G</a> <a href="#fnref:130" class="footnote-back-ref">↩</a></li>
<li id="fn:131">Finocchiaro 2010, pp. 72. - Finocchiaro, Maurice (2010), Defending Copernicus and Galileo: Critical Reasoning in the two Affairs, Springer, ISBN 978-9048132003 <a href="#fnref:131" class="footnote-back-ref">↩</a></li>
<li id="fn:132">Graney 2015, pp. 71. - Graney, Christopher M. (2015), Setting Aside All Authority: Giovanni Battista Riccioli and the Science against Copernicus in the Age of Galileo, University of Notre Dame Press, Bibcode:2015saaa.book.....G, ISBN 978-0-268-02988-3 <a href="https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G" target="_blank">https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G</a> <a href="#fnref:132" class="footnote-back-ref">↩</a></li>
<li id="fn:133">Graney 2015, pp. 66–76, 164–175, 187–195. - Graney, Christopher M. (2015), Setting Aside All Authority: Giovanni Battista Riccioli and the Science against Copernicus in the Age of Galileo, University of Notre Dame Press, Bibcode:2015saaa.book.....G, ISBN 978-0-268-02988-3 <a href="https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G" target="_blank">https://ui.adsabs.harvard.edu/abs/2015saaa.book.....G</a> <a href="#fnref:133" class="footnote-back-ref">↩</a></li>
<li id="fn:134">Favaro 1907, p. 320. - Favaro, Antonio [in Italian], ed. (1907). Le Opere di Galileo Galilei, Edizione Nazionale [The Works of Galileo Galilei, National Edition] (in Italian). Vol. 19. Florence: Barbera. ISBN 978-88-09-20881-0. Archived from the original on July 13, 2007. <a href="https://web.archive.org/web/20070713092939/http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO" target="_blank">https://web.archive.org/web/20070713092939/http://moro.imss.fi.it/lettura/LetturaWEB.DLL?AZIONE=CATALOGO</a> <a href="#fnref:134" class="footnote-back-ref">↩</a></li>
<li id="fn:135">Domínguez (2014) Archived March 2, 2021, at the Wayback Machine; arXiv:1402.6168 Original text of the decision <a href="http://esmateria.com/2014/02/28/una-errata-reproducida-durante-siglos-cambia-la-censura-de-la-iglesia-a-galileo/" target="_blank">http://esmateria.com/2014/02/28/una-errata-reproducida-durante-siglos-cambia-la-censura-de-la-iglesia-a-galileo/</a> <a href="#fnref:135" class="footnote-back-ref">↩</a></li>
<li id="fn:136">Heilbron 2010, p. 218. - Heilbron, John L. (2010). Galileo. OUP. ISBN 978-0-19-958352-2. <a href="https://books.google.com/books?id=tnIVDAAAQBAJ" target="_blank">https://books.google.com/books?id=tnIVDAAAQBAJ</a> <a href="#fnref:136" class="footnote-back-ref">↩</a></li>
<li id="fn:137">Heilbron 2010, p. 218. - Heilbron, John L. (2010). Galileo. OUP. ISBN 978-0-19-958352-2. <a href="https://books.google.com/books?id=tnIVDAAAQBAJ" target="_blank">https://books.google.com/books?id=tnIVDAAAQBAJ</a> <a href="#fnref:137" class="footnote-back-ref">↩</a></li>
<li id="fn:138">Finochiario, Maurice (2007). Retrying Galileo. University of California Press. <a href="#fnref:138" class="footnote-back-ref">↩</a></li>
<li id="fn:139">Finochiario, Maurice (2007). Retrying Galileo. University of California Press. <a href="#fnref:139" class="footnote-back-ref">↩</a></li>
<li id="fn:140">The Systeme of the World: in Four Dialogues (1661) Thomas Salusbury translation of Dialogo sopra i Due Massi Sistemi del Mondo (1632) <a href="https://en.wikiquote.org/wiki/The_Systeme_of_the_World:_in_Four_Dialogues" target="_blank">https://en.wikiquote.org/wiki/The_Systeme_of_the_World:_in_Four_Dialogues</a> <a href="#fnref:140" class="footnote-back-ref">↩</a></li>
<li id="fn:141">The Systeme of the World: in Four Dialogues (1661) Thomas Salusbury translation of Dialogo sopra i Due Massi Sistemi del Mondo (1632) <a href="https://en.wikiquote.org/wiki/The_Systeme_of_the_World:_in_Four_Dialogues" target="_blank">https://en.wikiquote.org/wiki/The_Systeme_of_the_World:_in_Four_Dialogues</a> <a href="#fnref:141" class="footnote-back-ref">↩</a></li>
<li id="fn:142">Koestler 1990, p. 491. - Koestler, Arthur (1990) [1959]. The Sleepwalkers: A history of man's changing vision of the universe. London: Penguin Books. ISBN 978-0-14-019246-9. <a href="#fnref:142" class="footnote-back-ref">↩</a></li>
<li id="fn:143">Heilbron 1999, p. 203. - Heilbron, John L. (1999). The Sun in the Church: Cathedrals as Solar Observatories. Cambridge, MA: Harvard University Press. ISBN 978-0-674-00536-5. <a href="https://books.google.com/books?id=mZWy0xPxj3EC" target="_blank">https://books.google.com/books?id=mZWy0xPxj3EC</a> <a href="#fnref:143" class="footnote-back-ref">↩</a></li>
<li id="fn:144">"The Pontifical Decrees Against the Doctrine of the Earth's Movement, and the Ultramontane Defence of Them", Rev. William Roberts, 1885, London <a href="#fnref:144" class="footnote-back-ref">↩</a></li>
<li id="fn:145">Weintraub, David A. Is Pluto a Planet, p. 66, Princeton University Press, 2007 <a href="#fnref:145" class="footnote-back-ref">↩</a></li>
<li id="fn:146">Gillispie, Charles Coulston (1960). The Edge of Objectivity: An Essay in the History of Scientific Ideas. Princeton University Press. pp. 92–93. ISBN 0-691-02350-6. {{cite book}}: ISBN / Date incompatibility (help) <a href="0-691-02350-6" target="_blank">0-691-02350-6</a> <a href="#fnref:146" class="footnote-back-ref">↩</a></li>
<li id="fn:147">"Kepler's Laws of Planetary Motion: 1609–1666", J. L. Russell, British Journal for the History of Science, Vol. 2, No. 1, June 1964 <a href="#fnref:147" class="footnote-back-ref">↩</a></li>
<li id="fn:148">Weintraub, David A. Is Pluto a Planet, p. 66, Princeton University Press, 2007 <a href="#fnref:148" class="footnote-back-ref">↩</a></li>
<li id="fn:149">Curtis Wilson, "The Newtonian achievement in astronomy", pp. 233–274 in R Taton & C Wilson (eds) (1989), The General History of Astronomy, Volume 2A, at p. 233 <a href="https://books.google.com/books?id=rkQKU-wfPYMC&pg=PA233" target="_blank">https://books.google.com/books?id=rkQKU-wfPYMC&pg=PA233</a> <a href="#fnref:149" class="footnote-back-ref">↩</a></li>
<li id="fn:150">(text quotations from 1729 translation of Newton Principia, Book 3 (1729 vol.2) at pp. 232–233). <a href="https://archive.org/details/bub_gb_6EqxPav3vIsC/page/n257" target="_blank">https://archive.org/details/bub_gb_6EqxPav3vIsC/page/n257</a> <a href="#fnref:150" class="footnote-back-ref">↩</a></li>
<li id="fn:151">Heilbron 1999, pp. 147–175. - Heilbron, John L. (1999). The Sun in the Church: Cathedrals as Solar Observatories. Cambridge, MA: Harvard University Press. ISBN 978-0-674-00536-5. <a href="https://books.google.com/books?id=mZWy0xPxj3EC" target="_blank">https://books.google.com/books?id=mZWy0xPxj3EC</a> <a href="#fnref:151" class="footnote-back-ref">↩</a></li>
<li id="fn:152">John L.Heilbron, Censorship of Astronomy in Italy after Galileo (in McMullin, Ernan ed., The Church and Galileo, University of Notre Dame Press, Notre Dame, 2005, p. 307, IN. ISBN 0-268-03483-4) <a href="/wiki/ISBN_(identifier)" target="_blank">/wiki/ISBN_(identifier)</a> <a href="#fnref:152" class="footnote-back-ref">↩</a></li>
<li id="fn:153">Heilbron 2005, pp. 279, 312–313. - Heilbron, John L. (2005). "Censorship of Astronomy in Italy after Galileo". In McMullin, Ernan (ed.). The Church and Galileo. University of Notre Dame Press, Notre Dame. ISBN 978-0-268-03483-2. <a href="#fnref:153" class="footnote-back-ref">↩</a></li>
<li id="fn:154">Heilbron 2005, pp. 279, 312. - Heilbron, John L. (2005). "Censorship of Astronomy in Italy after Galileo". In McMullin, Ernan (ed.). The Church and Galileo. University of Notre Dame Press, Notre Dame. ISBN 978-0-268-03483-2. <a href="#fnref:154" class="footnote-back-ref">↩</a></li>
<li id="fn:155">"Viviani's pendulum". <a href="https://www.newscientist.com/letter/mg18524814-100-vivianis-pendulum/" target="_blank">https://www.newscientist.com/letter/mg18524814-100-vivianis-pendulum/</a> <a href="#fnref:155" class="footnote-back-ref">↩</a></li>
<li id="fn:156">Noah J. Efron. Jewish Thought and Scientific Discovery in Early Modern Europe. Journal of the History of Ideas, Vol. 58, No. 4 (Oct., 1997), pp. 719–732 <a href="https://www.jstor.org/stable/3653968" target="_blank">https://www.jstor.org/stable/3653968</a> <a href="#fnref:156" class="footnote-back-ref">↩</a></li>
<li id="fn:157">Sefer Elim, Amsterdam, 1629, стр. 304 <a href="#fnref:157" class="footnote-back-ref">↩</a></li>
<li id="fn:158">Neher 1977. - Neher, André (1977). "Copernicus in the Hebraic Literature from the Sixteenth to the Eighteenth Century". Journal of the History of Ideas. 38 (2): 221–226. doi:10.2307/2708908. JSTOR 2708908. <a href="https://doi.org/10.2307%2F2708908" target="_blank">https://doi.org/10.2307%2F2708908</a> <a href="#fnref:158" class="footnote-back-ref">↩</a></li>
<li id="fn:159">In a marginal note in his Massé Touvia (part 2, p. 52b): "Remark of the author: I fear that the incredulous may draw an objection from a text of Midrash Bereshit Rabba (V,8) in which our Teachers, the Rabbis, of blessed memory, explain that if the Earth is called in Hebrew "eretz" it is because it hastens ("ratseta") before the Creator in order to accomplish His will. I acknowledge that the answer to this objection seems difficult for me to find", as translated by Neher (1977, p. 220). - Neher, André (1977). "Copernicus in the Hebraic Literature from the Sixteenth to the Eighteenth Century". Journal of the History of Ideas. 38 (2): 221–226. doi:10.2307/2708908. JSTOR 2708908. <a href="https://doi.org/10.2307%2F2708908" target="_blank">https://doi.org/10.2307%2F2708908</a> <a href="#fnref:159" class="footnote-back-ref">↩</a></li>
<li id="fn:160">"יפח לקץ – חלק א – שלזינגר, ישראל דוד (page 13 of 134)". www.hebrewbooks.org. Retrieved August 14, 2017. <a href="https://www.hebrewbooks.org/pdfpager.aspx?req=32691&st=&pgnum=13&hilite=" target="_blank">https://www.hebrewbooks.org/pdfpager.aspx?req=32691&st=&pgnum=13&hilite=</a> <a href="#fnref:160" class="footnote-back-ref">↩</a></li>
<li id="fn:161">Jeremy, Brown (2008–2009). "Rabbi Reuven Landau and the Jewish Reaction to Copernican Thought in Nineteenth Century Europe" (PDF). The Torah U-Madda Journal. 15: 142. <a href="https://static1.squarespace.com/static/54694fa6e4b0eaec4530f99d/t/54a04248e4b0d99a53e347fc/1419788872031/Torah+Umaddah-+Reuven+Landa.pdf" target="_blank">https://static1.squarespace.com/static/54694fa6e4b0eaec4530f99d/t/54a04248e4b0d99a53e347fc/1419788872031/Torah+Umaddah-+Reuven+Landa.pdf</a> <a href="#fnref:161" class="footnote-back-ref">↩</a></li>
<li id="fn:162">"HebrewBooks.org Sefer Detail: מי מנוחות – נויזץ, אליעזר ליפמן". hebrewbooks.org. Retrieved August 14, 2017. <a href="http://hebrewbooks.org/6262" target="_blank">http://hebrewbooks.org/6262</a> <a href="#fnref:162" class="footnote-back-ref">↩</a></li>
<li id="fn:163">Rabbi Natan, Slifkin. "The Sun's Path at Night: The Revolution in Rabbinic Perspectives on the Ptolemaic Revolution". Rationalist Judaism. Retrieved August 8, 2017. <a href="http://www.rationalistjudaism.com/2010/11/key-to-everything.html" target="_blank">http://www.rationalistjudaism.com/2010/11/key-to-everything.html</a> <a href="#fnref:163" class="footnote-back-ref">↩</a></li>
<li id="fn:164">Brown, Jeremy (2013). New heavens and a new earth : the Jewish reception of Copernican thought. Oxford: Oxford University Press. p. 262. ISBN 978-0-19-975479-3. OCLC 808316428. <a href="978-0-19-975479-3" target="_blank">978-0-19-975479-3</a> <a href="#fnref:164" class="footnote-back-ref">↩</a></li>
<li id="fn:165">"on the basis of the presently accepted scientific view (in accordance with the theory of Relativity) that where two bodies in space are in motion relative to one another, it is impossible scientifically to ascertain which revolves around which, or which is stationary and the other in motion. Therefore, to say that there is, or can be, 'scientific proof' that the earth revolves around the sun is quite an unscientific and uncritical statement."""Igrot Kodesh" v. 7, p. 134, letter number 1996". Otzar770.com. Retrieved December 4, 2012.
 <a href="http://otzar770.com/library/display_page.asp?nPageNumber=134&ilSC=40&nBookId=11&cPartLetter=B" target="_blank">http://otzar770.com/library/display_page.asp?nPageNumber=134&ilSC=40&nBookId=11&cPartLetter=B</a> <a href="#fnref:165" class="footnote-back-ref">↩</a></li>
<li id="fn:166">Brown, Jeremy (2013). New heavens and a new earth : the Jewish reception of Copernican thought. Oxford: Oxford University Press. p. 362. ISBN 978-0-19-975479-3. OCLC 808316428. <a href="978-0-19-975479-3" target="_blank">978-0-19-975479-3</a> <a href="#fnref:166" class="footnote-back-ref">↩</a></li>
<li id="fn:167">Herschel, William (January 1, 1785). "XII. On the construction of the heavens". Philosophical Transactions of the Royal Society of London. 75: 213–266. doi:10.1098/rstl.1785.0012. S2CID 186213203. <a href="https://doi.org/10.1098%2Frstl.1785.0012" target="_blank">https://doi.org/10.1098%2Frstl.1785.0012</a> <a href="#fnref:167" class="footnote-back-ref">↩</a></li>
<li id="fn:168">Berendzen, Richard (1975). "Geocentric to heliocentric to galactocentric to acentric: the continuing assault to the egocentric". Vistas in Astronomy. 17 (1): 65–83. Bibcode:1975VA.....17...65B. doi:10.1016/0083-6656(75)90049-5. Retrieved August 26, 2020. <a href="https://www.sciencedirect.com/science/article/abs/pii/0083665675900495" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0083665675900495</a> <a href="#fnref:168" class="footnote-back-ref">↩</a></li>
<li id="fn:169">van de Kamp, Peter (October 1965), "The Galactocentric Revolution, A Reminiscent Narrative", Publications of the Astronomical Society of the Pacific, 77 (458): 324–328, Bibcode:1965PASP...77..325V, doi:10.1086/128228 <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:169" class="footnote-back-ref">↩</a></li>
<li id="fn:170">Berendzen, Richard (1975). "Geocentric to heliocentric to galactocentric to acentric: the continuing assault to the egocentric". Vistas in Astronomy. 17 (1): 65–83. Bibcode:1975VA.....17...65B. doi:10.1016/0083-6656(75)90049-5. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:170" class="footnote-back-ref">↩</a></li>
<li id="fn:171">"The Shape of the Milky Way from Starcounts". Astro 801. Retrieved June 5, 2018. <a href="https://www.e-education.psu.edu/astro801/content/l8_p3.html" target="_blank">https://www.e-education.psu.edu/astro801/content/l8_p3.html</a> <a href="#fnref:171" class="footnote-back-ref">↩</a></li>
<li id="fn:172">"Meet the Stargazers". WHYY. Retrieved June 6, 2018. <a href="https://www.pbs.org/seeinginthedark/meet-the-stargazers/in-history.html" target="_blank">https://www.pbs.org/seeinginthedark/meet-the-stargazers/in-history.html</a> <a href="#fnref:172" class="footnote-back-ref">↩</a></li>
<li id="fn:173">Ferris, Timothy (2003), Coming of Age in the Milky Way, HarperCollins, pp. 150–159, ISBN 978-0-06-053595-7 <a href="978-0-06-053595-7" target="_blank">978-0-06-053595-7</a> <a href="#fnref:173" class="footnote-back-ref">↩</a></li>
<li id="fn:174">van de Kamp, Peter (October 1965), "The Galactocentric Revolution, A Reminiscent Narrative", Publications of the Astronomical Society of the Pacific, 77 (458): 324–328, Bibcode:1965PASP...77..325V, doi:10.1086/128228 <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:174" class="footnote-back-ref">↩</a></li>
<li id="fn:175">Harrison, Edward Robert (2000), Cosmology: The Science of the Universe, Cambridge University Press, pp. 67–71, ISBN 978-0-521-66148-5 <a href="978-0-521-66148-5" target="_blank">978-0-521-66148-5</a> <a href="#fnref:175" class="footnote-back-ref">↩</a></li>
<li id="fn:176">Berendzen, Richard (1975). "Geocentric to heliocentric to galactocentric to acentric: the continuing assault to the egocentric". Vistas in Astronomy. 17 (1): 65–83. Bibcode:1975VA.....17...65B. doi:10.1016/0083-6656(75)90049-5. Retrieved August 26, 2020. <a href="https://www.sciencedirect.com/science/article/abs/pii/0083665675900495" target="_blank">https://www.sciencedirect.com/science/article/abs/pii/0083665675900495</a> <a href="#fnref:176" class="footnote-back-ref">↩</a></li>
<li id="fn:177">Berendzen, Richard (1975). "Geocentric to heliocentric to galactocentric to acentric: the continuing assault to the egocentric". Vistas in Astronomy. 17 (1): 65–83. Bibcode:1975VA.....17...65B. doi:10.1016/0083-6656(75)90049-5. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:177" class="footnote-back-ref">↩</a></li>
<li id="fn:178">(text quotations from 1729 translation of Newton Principia, Book 3 (1729 vol.2) at pp. 232–233). <a href="https://archive.org/details/bub_gb_6EqxPav3vIsC/page/n257" target="_blank">https://archive.org/details/bub_gb_6EqxPav3vIsC/page/n257</a> <a href="#fnref:178" class="footnote-back-ref">↩</a></li>
<li id="fn:179">Fisher, Debra (August 1, 2006). "How would astronomers in another solar system know by observing our Sun's wobble that our Sun has not just one big planet, but nine, each with a different mass? | Astronomy.com". Astronomy Magazine. Retrieved July 15, 2024. <a href="https://www.astronomy.com/science/how-would-astronomers-in-another-solar-system-know-by-observing-our-suns-wobble-that-our-sun-has-not-just-one-big-planet-but-nine-each-with-a-different-mass/" target="_blank">https://www.astronomy.com/science/how-would-astronomers-in-another-solar-system-know-by-observing-our-suns-wobble-that-our-sun-has-not-just-one-big-planet-but-nine-each-with-a-different-mass/</a> <a href="#fnref:179" class="footnote-back-ref">↩</a></li>
<li id="fn:180">Shen, J. & Confrey, J. (2010). "Justifying alternative models in learning the solar system: A case study on K-8 science teachers’ understanding of frames of reference". International Journal of Science Education, 32 (1), 1–29. <a href="#fnref:180" class="footnote-back-ref">↩</a></li>
<li id="fn:181">See center-of-mass frame <a href="/wiki/Center-of-mass_frame" target="_blank">/wiki/Center-of-mass_frame</a> <a href="#fnref:181" class="footnote-back-ref">↩</a></li>
</ol>

Heliocentrism open-in-new

Heliocentrism