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Orders of magnitude (area)
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<h2 id="1070-to-109-square-metres">10−70 to 10−9 square metres</h2> List of orders of magnitude for <a href="/facts/Area/KsNG1G9t">area</a> 10−70 to 10−9 square metres<table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td>10−70</td><td> </td><td>2.6×10−70 m2</td><td><a href="/facts/Planck_length/4o04JYdD">Planck area</a>, G ℏ c 3 {\displaystyle {\frac {G\hbar }{c^{3}}}} <a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a></td></tr><tr><td>10−60</td><td>1 square <a href="/facts/Quectometre/YzL1bHGX">quectometre</a></td></tr><tr><td>10−54</td><td>1 square <a href="/facts/Rontometre/YzL1bHGX">rontometre</a></td></tr><tr><td>10−52</td><td> </td><td>100 rm2</td><td>1 <a href="/facts/Shed_(physics)/0yCEtKJ9">shed</a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></td></tr><tr><td>10−48</td><td>1 square <a href="/facts/Yoctometre/YzL1bHGX">yoctometre</a> (ym2)</td><td> 1 ym2</td><td> </td></tr><tr><td>10−43</td><td> </td><td>100,000 ym2</td><td>1 <a href="/facts/Femtobarn/0yCEtKJ9">femtobarn</a><a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a></td></tr><tr><td>10−42</td><td>1 square <a href="/facts/Zeptometre/YzL1bHGX">zeptometre</a> (zm2)</td><td> 1 zm2</td><td> </td></tr><tr><td>10−36</td><td>1 square <a href="/facts/Attometre/YzL1bHGX">attometre</a> (am2)</td><td> 1 am2</td><td> </td></tr><tr><td>10−30</td><td>1 square <a href="/facts/Femtometre/9XzQ8UmR">femtometre</a> (fm2)</td><td> 1 fm2</td><td> </td></tr><tr><td>10−29</td><td> </td><td>66.52 fm2</td><td><a href="/facts/Thomson_scattering/hUj6gSgB">Thomson cross-section</a> of the electron<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a></td></tr><tr><td>10−28</td><td> </td><td>100 fm2</td><td>1 <a href="/facts/Barn_(unit)/0yCEtKJ9">barn</a>, roughly the cross-sectional area of a <a href="/facts/Uranium/n2sGWBzU">uranium</a> <a href="/facts/Atomic_nucleus/orpIm5Xl">nucleus</a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a></td></tr><tr><td>10−24</td><td>1 square <a href="/facts/Picometre/Cb54mVBX">picometre</a> (pm2)</td><td> 1 pm2</td><td> </td></tr><tr><td>10−20</td><td>1 square <a href="/facts/Angstrom/T5mjdd97">angstrom</a> (Å2)</td><td> 10,000 pm2</td><td> </td></tr><tr><td rowspan="2">10−19</td><td></td><td>100,000 pm2</td><td>Area of a <a href="/facts/Lipid_bilayer/CQKQ9l3g">lipid bilayer</a>, per molecule<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a></td></tr><tr><td></td><td>75,000–260,000 pm2</td><td>Surface area of the 20 standard <a href="/facts/Amino_acids/WDxYwBny">amino acids</a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a></td></tr><tr><td>10−18</td><td>1 square <a href="/facts/Nanometre/a98sjHyu">nanometre</a> (nm2)</td><td> 1 nm2</td><td> </td></tr><tr><td>10−16</td><td></td><td>100 nm2</td><td><a href="/facts/Globular_protein/PBlAMbBP">Globular proteins</a>: solvent-accessible surface area of a typical globular protein, having a typical molecular mass of ~35000 u (quite variable)<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></td></tr><tr><td>10−14</td><td></td><td>17,000 nm2</td><td>Cross-sectional area of a <a href="/facts/Nuclear_pore_complex/CQ4IQG4s">nuclear pore complex</a> in vertebrates<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a></td></tr><tr><td>10−12</td><td>1 square <a href="/facts/Micrometre/7eDFxD2L">micrometre</a> (μm2)</td><td>6 μm2</td><td>Surface area of an <i><a href="/facts/Escherichia_coli/nR4Gvl56">E. coli</a></i> bacterium<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></td></tr><tr><td>10−10</td><td> </td><td>100 μm2</td><td>Surface area of a <a href="/facts/Red_blood_cell/Kggpq8Jh">red blood cell</a><a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a></td></tr><tr><td rowspan="3">10−9</td><td> </td><td>6,000–110,000 μm2</td><td>Range of common <a href="/facts/Dot_pitch/G6h5eyK4">LCD screen pixel sizes</a><a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></td></tr><tr><td> </td><td>7,000 μm2</td><td>Area of a dot printed using 300 <a href="/facts/Dots_per_inch/V1jh6x0l">dots per inch</a> resolution<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a></td></tr><tr><td> </td><td>8,000 μm2</td><td>Cross-sectional area of a straight <a href="/facts/Human_hair/L7vt9FL3">human hair</a> that is 100 μm<a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> in diameter<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a></td></tr></tbody></table> <h2 id="108-to-101-square-metres">10−8 to 10−1 square metres</h2> List of orders of magnitude for <a href="/facts/Area/KsNG1G9t">areas</a> 10−8 to 10−1 square metres<table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td>10−8</td><td> </td><td>55,000 μm2</td><td>Size of a <a href="/facts/Pixel/UzwBvXBV">pixel</a> on a typical modern <a href="/facts/Computer_display/NRaTDFHc">computer display</a></td></tr><tr><td>10−7</td><td> </td><td>2-400,000 μm2</td><td>Cross-sectional area of a <a href="/facts/Mechanical_pencil/o5MWlXtT">mechanical pencil</a> lead (0.5-0.7 mm in diameter)<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a></td></tr><tr><td rowspan="2">10−6</td><td rowspan="2">1 square <a href="/facts/Millimetre/25mdTXpa">millimetre</a> (mm2)</td><td>1–2 mm2</td><td>Area of a human <a href="/facts/Fovea_centralis/cCqjWzTj">fovea</a><a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a></td></tr><tr><td>2 mm2</td><td>Area of the head of a <a href="/facts/Pin/gD2qFvc3">pin</a></td></tr><tr><td>10−5</td><td> </td><td>30–50 mm2</td><td>Area of a 6–8 mm hole punched in a piece of paper by a <a href="/facts/Hole_punch/oAMQEvNQ">hole punch</a><a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></td></tr><tr><td rowspan="2">10−4</td><td rowspan="2">1 square <a href="/facts/Centimetre/urPkBdGR">centimetre</a> (cm2)</td><td>290 mm2</td><td>Area of one side of a U.S. penny<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a><a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a></td></tr><tr><td>500 mm2</td><td>Area of a typical <a href="/facts/Postage_stamp/T8gb7wCP">postage stamp</a></td></tr><tr><td rowspan="3">10−3</td><td rowspan="3"> </td><td>1,100 mm2</td><td>Area of a human retina<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a></td></tr><tr><td>4,600 mm2</td><td>Area of the face of a <a href="/facts/Credit_card/7pKSB5LD">credit card</a><a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a></td></tr><tr><td rowspan="4">10−2</td><td rowspan="4">1 square <a href="/facts/Decimetre/Ww43QljM">decimetre</a> (dm2)</td><td>10,000 mm2</td><td>Index card (3 × 5 <a href="/facts/Inch/CocFfm8p">inches</a>)<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a></td></tr><tr><td>60,000 mm2</td><td>American <a href="/facts/Paper_size/6hEUyNU2">letter paper</a> (11 × 8.5 <a href="/facts/Inch/CocFfm8p">inches</a>, "A" size)</td></tr><tr><td>62,370 mm2</td><td>International <a href="/facts/A4_paper_size/jsfzqPxA">A4 paper</a> (210 × 297 mm)</td></tr><tr><td>92,903 mm2</td><td>1 <a href="/facts/Square_foot/s8CBfP91">square foot</a><a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a></td></tr><tr><td rowspan="4">10−1</td><td rowspan="4"> </td><td>125,000 mm2</td><td>International <a href="/facts/Paper_size/6hEUyNU2">A3 paper</a> (297 × 420 mm)</td></tr><tr><td>180,000 mm2</td><td>Surface area of a <a href="/facts/Basketball_(ball)/JalYa3yw">basketball</a> (diameter 24 cm)<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a><a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a></td></tr><tr><td>250,000 mm2</td><td>International <a href="/facts/Paper_size/6hEUyNU2">A2 paper</a> (420 × 594 mm)</td></tr><tr><td>500,000 mm2</td><td>International <a href="/facts/Paper_size/6hEUyNU2">A1 paper</a> (594 × 841 mm)</td></tr></tbody></table> <h2 id="100-to-107-square-metres">100 to 107 square metres</h2> List of orders of magnitude for <a href="/facts/Area/KsNG1G9t">areas</a> 100 to 107 square metres.<table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td rowspan="3">100</td><td rowspan="3">1 <a href="/facts/Square_metre/u5nT9y0W">square metre</a></td><td>1 m2</td><td>International <a href="/facts/Paper_size/6hEUyNU2">A0 paper</a> (841 × 1189 mm)</td></tr><tr><td>1.73 m2</td><td>A number commonly used as the average body surface area of a human<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a></td></tr><tr><td>1–4 m2</td><td>Area of the top of an office desk</td></tr><tr><td rowspan="2">101</td><td rowspan="2"> </td><td>10–20 m2</td><td>A parking space</td></tr><tr><td>70 m2</td><td>Approximate surface area of a human lung<a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a></td></tr><tr><td rowspan="7">102</td><td rowspan="7">1 square <a href="/facts/Decametre/2A3vssMs">decametre</a> (dam2)</td><td>100 m2</td><td>One <a href="/facts/Hectare/DPz2HDGr">are</a> (a)</td></tr><tr><td>162 m2</td><td>Size of a <a href="/facts/Volleyball/28rBEwRd">volleyball</a> court (18 × 9 metres)<a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a></td></tr><tr><td>202 m2</td><td>Floor area of a median <a href="/facts/Suburb/8Nv6KVJr">suburban</a> three-bedroom house in the US in 2010: 2,169 sq ft (201.5 m2)<a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a></td></tr><tr><td>261 m2</td><td>Size of a <a href="/facts/Tennis_court/wn2E1rtH">tennis court</a><a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a></td></tr><tr><td>437 m2</td><td>Size of an NBA/WNBA/NCAA <a href="/facts/Basketball_court/U8EYrwv3">basketball court</a><a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a></td></tr><tr><td>845 m2</td><td>Wing area of <a href="/facts/Airbus_A380/cVuVbEsf">Airbus A380</a>, the largest commercial airliner<a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a></td></tr><tr><td>978 m2</td><td>Size of the primary mirror of the <a href="/facts/Extremely_Large_Telescope/PCAY1z8l">Extremely Large Telescope</a>, the largest optical telescope in the world (under construction)<a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a></td></tr><tr><td rowspan="5">103</td><td rowspan="5">1 <a href="/facts/Metric_prefix/Y2MzkaeL">kilo</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> k(m2)</td><td>1,000 m2</td><td>Surface area of a modern <a href="/facts/Stremma/bdyWDRv5">stremma</a> or <a href="/facts/Dunam/tfNjURLz">dunam</a></td></tr><tr><td>1,250 m2</td><td>Surface area of the water in an <a href="/facts/Olympic-size_swimming_pool/tzGgbDce">Olympic-size swimming pool</a><a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a></td></tr><tr><td>4,047 m2</td><td>1 <a href="/facts/Acre/FDPa5k4G">acre</a><a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a></td></tr><tr><td>5,400 m2</td><td>Size of an <a href="/facts/American_football_field/43u5Pu7y">American football field</a><a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a><a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a></td></tr><tr><td>7,140 m2</td><td>Size of a typical <a href="/facts/Football_(soccer)_field/PST7Hk7R">football (soccer) field</a><a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a><a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a></td></tr><tr><td rowspan="4">104</td><td rowspan="4">1 square <a href="/facts/Hectometre/y4vg9uCK">hectometre</a> (hm2)</td><td>10,000 m2</td><td>1 <a href="/facts/Hectare/DPz2HDGr">hectare</a> (ha)<a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a></td></tr><tr><td>17,000 m2</td><td>Approximate area of a <a href="/facts/Cricket_field/wkT7jbS9">cricket field</a> (theoretical limits: 6,402 m2 to 21,273 m2)<a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a></td></tr><tr><td>22,100 m2</td><td>Area of a <a href="/facts/Manhattan/fF9JeXjh">Manhattan</a> <a href="/facts/City_block/LQ5LA1S7">city block</a></td></tr><tr><td>53,000 m2</td><td>Base of the <a href="/facts/Great_Pyramid_of_Giza/7p5HrMFb">Great Pyramid of Giza</a><a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a><a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a></td></tr><tr><td rowspan="5">105</td><td rowspan="5"> </td><td>195,000 m2</td><td><a href="/facts/Irish_National_Botanic_Gardens/DVno7E0V">Irish National Botanic Gardens</a><a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a></td></tr><tr><td>490,000 m2</td><td><a href="/facts/Vatican_City/JTKnEt6J">Vatican City</a><a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a></td></tr><tr><td>600,000 m2</td><td>Total floor area of <a href="/facts/The_Pentagon/vkuy1sHT">the Pentagon</a><a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a></td></tr><tr><td>659,611 m2</td><td>Total floor area of <a href="/facts/Surat_Diamond_Bourse/lJNSgfXk">Surat Diamond Bourse</a> (largest office building)<a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a></td></tr><tr><td>887,800 m2</td><td><a href="/facts/AvtoVAZ/vF6kdG16">AvtoVAZ</a> main assembly building, Tolyatti, Russia (largest building by footprint)</td></tr><tr><td rowspan="4">106</td><td rowspan="4">1 <a href="/facts/Metric_prefix/Y2MzkaeL">mega</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> M(m2)<p>1 <a href="/facts/Square_kilometre/GgoBy690">square kilometre</a> (km2)</p></td><td>1.76 km2</td><td><a href="/facts/New_Century_Global_Center/XehnUz1a">New Century Global Center</a>, Chengdu, China (largest building by total floor area)</td></tr><tr><td>2 km2</td><td><a href="/facts/Monaco/QjjEJwKy">Monaco</a> (country ranked 192nd by area)<a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a></td></tr><tr><td>2.59 km2</td><td>1 <a href="/facts/Square_mile/APEmjNTq">square mile</a><a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a></td></tr><tr><td>2.9 km2</td><td><a href="/facts/City_of_London/Psl9khal">City of London</a> (not all of modern <a href="/facts/London/KozCCsy9">London</a>)<a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a></td></tr><tr><td rowspan="2">107</td><td rowspan="2"> </td><td>59.5 km2</td><td><a href="/facts/Manhattan/fF9JeXjh">Manhattan</a> Island (land area)<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a></td></tr><tr><td>61 km2</td><td><a href="/facts/San_Marino/dlbbyRcT">San Marino</a><a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a></td></tr></tbody></table> <h2 id="108-to-1014-square-metres">108 to 1014 square metres</h2> <table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td rowspan="4">108</td><td rowspan="4"> </td><td>105 km2</td><td><a href="/facts/Paris/DrNHpwnA">Paris</a> (inner city only)<a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a></td></tr><tr><td>110 km2</td><td><a href="/facts/Walt_Disney_World/fqeJkejj">Walt Disney World</a><a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a></td></tr><tr><td>272 km2</td><td><a href="/facts/Taipei/uxB89v54">Taipei City</a><a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a></td></tr><tr><td>630 km2</td><td><a href="/facts/Toronto/cnXH7881">Toronto</a><a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a></td></tr><tr><td rowspan="7">109</td><td rowspan="7">1 <a href="/facts/Metric_prefix/Y2MzkaeL">giga</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> G(m2)</td><td>1,100 km2</td><td><a href="/facts/Hong_Kong/4nAf3mqQ">Hong Kong</a><a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a></td></tr><tr><td>1,290 km2</td><td><a href="/facts/Los_Angeles,_California/pyXpYEX9">Los Angeles, California</a>, United States (city)<a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a></td></tr><tr><td>1,962 km2</td><td><a href="/facts/Jacksonville,_Florida/u6syYft2">Jacksonville, Florida</a>; largest city in the <a href="/facts/Continental_US/yx414G7a">Continental US</a><a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a></td></tr><tr><td>2,188 km2</td><td><a href="/facts/Tokyo/GTvuw4ct">Tokyo</a><a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a></td></tr><tr><td>3,130 km2</td><td>Average area of an American <a href="/facts/County_(United_States)/DAjCz23J">county</a></td></tr><tr><td>5,780 km2</td><td>Administrative area of <a href="/facts/Bali/ThlIdDeC">Bali</a><a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a></td></tr><tr><td>8,030 km2</td><td><a href="/facts/Community_of_Madrid/8YxtpVoc">Community of Madrid</a>, Spain</td></tr><tr><td rowspan="4">1010</td><td rowspan="4"> </td><td>11,000 km2</td><td><a href="/facts/Jamaica/jeDulmwE">Jamaica</a><a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a></td></tr><tr><td>30,528 km2</td><td>Belgium</td></tr><tr><td>68,870 km2</td><td><a href="/facts/Lake_Victoria/GLQHLh4M">Lake Victoria</a><a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a></td></tr><tr><td>84,000 km2</td><td>Austria<a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a></td></tr><tr><td rowspan="9">1011</td><td rowspan="9"> </td><td>100,000 km2</td><td><a href="/facts/South_Korea/pCobAaVw">South Korea</a><a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a></td></tr><tr><td>167,996 km2</td><td><a href="/facts/Jiuquan/p3ERlCQd">Jiuquan</a> in China</td></tr><tr><td>232,000 km2</td><td>Total area covered by underwater <a href="/facts/Search_for_Malaysia_Airlines_Flight_370/57ACTMgX">search for Malaysia Airlines Flight 370</a> (including both 2014-2017 and 2018 searches)</td></tr><tr><td>238,397 km2</td><td><a href="/facts/Romania/yolzk5cN">Romania</a><a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a></td></tr><tr><td>301,338 km2</td><td><a href="/facts/Italy/tUf0PDYF">Italy</a><a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a></td></tr><tr><td>357,000 km2</td><td>Germany<a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a></td></tr><tr><td>377,900 km2</td><td>Japan<a class="footnote-ref" id="fnref:70" href="#fn:70"><sup>70</sup></a></td></tr><tr><td>510,000 km2</td><td>Spain<a class="footnote-ref" id="fnref:71" href="#fn:71"><sup>71</sup></a></td></tr><tr><td>780,000 km2</td><td><a href="/facts/Turkey/KIYAWAs0">Turkey</a><a class="footnote-ref" id="fnref:72" href="#fn:72"><sup>72</sup></a></td></tr><tr><td rowspan="8">1012</td><td rowspan="8">1 <a href="/facts/Metric_prefix/Y2MzkaeL">tera</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> T(m2)<p>1 square <a href="/facts/Megametre/YzL1bHGX">megametre</a> (Mm2)</p></td><td>1.0 Mm2</td><td><a href="/facts/Egypt/8Ttg0JwB">Egypt</a> (<a href="/facts/List_of_countries_by_area/XQWaBfYo">country ranked 29th by area</a>)<a class="footnote-ref" id="fnref:73" href="#fn:73"><sup>73</sup></a></td></tr><tr><td>2 Mm2</td><td><a href="/facts/Mexico/IT5bwhdh">Mexico</a></td></tr><tr><td>3.10 Mm2</td><td><a href="/facts/Sakha_Republic/vlM5gM10">Sakha (Yakutia) Republic</a> in Russia (<a href="/facts/List_of_the_largest_country_subdivisions_by_area/F2p4BCtW">largest subnational governing body</a>)<a class="footnote-ref" id="fnref:74" href="#fn:74"><sup>74</sup></a></td></tr><tr><td>3.28 Mm2</td><td><a href="/facts/India/1kKHcnxM">India</a> (<a href="/facts/List_of_countries_by_area/XQWaBfYo">country ranked 7th by area</a>)</td></tr><tr><td>5 Mm2</td><td>Largest extent of the <a href="/facts/Roman_Empire/l4E1aUuV">Roman Empire</a><a class="footnote-ref" id="fnref:75" href="#fn:75"><sup>75</sup></a><a class="footnote-ref" id="fnref:76" href="#fn:76"><sup>76</sup></a></td></tr><tr><td>7.74 Mm2</td><td>Australia (<a href="/facts/List_of_countries_by_area/XQWaBfYo">country ranked 6th by area</a>)<a class="footnote-ref" id="fnref:77" href="#fn:77"><sup>77</sup></a></td></tr><tr><td>8.5 Mm2</td><td>Brazil</td></tr><tr><td>9.5 Mm2</td><td>China/ United States of America</td></tr><tr><td rowspan="12">1013</td><td rowspan="12"> </td><td>10 Mm2</td><td>Canada (including water)<a class="footnote-ref" id="fnref:78" href="#fn:78"><sup>78</sup></a></td></tr><tr><td>14 Mm2</td><td><a href="/facts/Antarctica/bEM5Lem5">Antarctica</a><a class="footnote-ref" id="fnref:79" href="#fn:79"><sup>79</sup></a></td></tr><tr><td>14 Mm2</td><td><a href="/facts/Arable_land/pTSyNmdg">Arable land</a> worldwide<a class="footnote-ref" id="fnref:80" href="#fn:80"><sup>80</sup></a></td></tr><tr><td>16.6 Mm2</td><td>Surface area of <a href="/facts/Pluto/egq7MBeR">Pluto</a><a class="footnote-ref" id="fnref:81" href="#fn:81"><sup>81</sup></a></td></tr><tr><td>17 Mm2</td><td>Russia (<a href="/facts/List_of_countries_by_area/XQWaBfYo">country ranked 1st by area</a>)<a class="footnote-ref" id="fnref:82" href="#fn:82"><sup>82</sup></a></td></tr><tr><td>24 Mm2</td><td>Largest extent of <a href="/facts/Mongol_Empire/cfddtfIK">Mongol Empire</a></td></tr><tr><td>30 Mm2</td><td><a href="/facts/Africa/XkqQUP9s">Africa</a><a class="footnote-ref" id="fnref:83" href="#fn:83"><sup>83</sup></a></td></tr><tr><td>35.5 Mm2</td><td>Largest extent of the <a href="/facts/British_Empire/hrsz0j7A">British Empire</a><a class="footnote-ref" id="fnref:84" href="#fn:84"><sup>84</sup></a></td></tr><tr><td>38 Mm2</td><td>Surface area of the <a href="/facts/Moon/zKHqEMPb">Moon</a><a class="footnote-ref" id="fnref:85" href="#fn:85"><sup>85</sup></a></td></tr><tr><td>44.6 Mm2</td><td><a href="/facts/Asia/4IToYrrQ">Asia</a> (largest <a href="/facts/Continent/Pysd9Sw8">continent</a> by area)</td></tr><tr><td>70.5 Mm2</td><td><a href="/facts/Indian_Ocean/Kv0crwKG">Indian Ocean</a><a class="footnote-ref" id="fnref:86" href="#fn:86"><sup>86</sup></a></td></tr><tr><td>85.1 Mm2</td><td><a href="/facts/Atlantic_Ocean/EI4uChIb">Atlantic Ocean</a><a class="footnote-ref" id="fnref:87" href="#fn:87"><sup>87</sup></a></td></tr><tr><td rowspan="5">1014</td><td rowspan="5"> </td><td>144 Mm2</td><td>Surface area of <a href="/facts/Mars/AQGtVvz0">Mars</a><a class="footnote-ref" id="fnref:88" href="#fn:88"><sup>88</sup></a></td></tr><tr><td>150 Mm2</td><td>Land area of <a href="/facts/Earth/HLLmDfj0">Earth</a><a class="footnote-ref" id="fnref:89" href="#fn:89"><sup>89</sup></a></td></tr><tr><td>168.7 Mm2</td><td><a href="/facts/Pacific_Ocean/bdxgXRVM">Pacific Ocean</a><a class="footnote-ref" id="fnref:90" href="#fn:90"><sup>90</sup></a></td></tr><tr><td>360 Mm2</td><td>Water area of Earth<a class="footnote-ref" id="fnref:91" href="#fn:91"><sup>91</sup></a></td></tr><tr><td>510 Mm2</td><td>Total surface area of Earth<a class="footnote-ref" id="fnref:92" href="#fn:92"><sup>92</sup></a></td></tr></tbody></table> <h2 id="1015-to-1026-square-metres">1015 to 1026 square metres</h2> List of orders of magnitude for <a href="/facts/Area/KsNG1G9t">areas</a> 1015 to 1026 square metres.<table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td rowspan="2">1015</td><td rowspan="2">1 <a href="/facts/Metric_prefix/Y2MzkaeL">peta</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> P(m2)</td><td>1,000 Mm2</td><td>Surface area of the <a href="/facts/White_dwarf/gIYlTtrC">white dwarf</a>, <a href="/facts/Van_Maanen%27s_star/Ly4cXSLE">Van Maanen's star</a></td></tr><tr><td>7,600 Mm2</td><td>Surface area of <a href="/facts/Neptune/1eucwHIC">Neptune</a><a class="footnote-ref" id="fnref:93" href="#fn:93"><sup>93</sup></a></td></tr><tr><td rowspan="2">1016</td><td rowspan="2"> </td><td>43,000 Mm2</td><td>Surface area of <a href="/facts/Saturn/D54LcGJ9">Saturn</a><a class="footnote-ref" id="fnref:94" href="#fn:94"><sup>94</sup></a></td></tr><tr><td>61 000 Mm2</td><td>Surface area of <a href="/facts/Jupiter/95m7XjMT">Jupiter</a>,<a class="footnote-ref" id="fnref:95" href="#fn:95"><sup>95</sup></a> the "surface" area of the spheroid (calculated from the mean radius as reported by NASA). The cross-sectional area of Jupiter, which is the same as the "circle" of Jupiter seen by an approaching spacecraft, is almost <a href="/facts/Sphere/jywYLNM2">exactly</a> one quarter the surface-area of the overall sphere, which in the case of Jupiter is approximately 1.535×1016 m2.</td></tr><tr><td rowspan="2">1017</td><td rowspan="2"> </td><td>2-600 000 Mm2</td><td>Surface area of the <a href="/facts/Brown_dwarf/fa7kr9lH">brown dwarf</a> <a href="/facts/CT_Chamaeleontis/Huqc7bzd">CT Chamaeleontis B</a>.</td></tr><tr><td>460,000 Mm2</td><td>Area swept by the Moon's <a href="/facts/Orbit/nD2TPySG">orbit</a> of Earth</td></tr><tr><td>1018</td><td>1 square <a href="/facts/Gigametre/YzL1bHGX">gigametre</a> (Gm2)</td><td>6.1 Gm2</td><td>Surface area of the <a href="/facts/Sun/CadPCVHh">Sun</a><a class="footnote-ref" id="fnref:96" href="#fn:96"><sup>96</sup></a></td></tr><tr><td>1019</td><td> </td><td>30 Gm2</td><td>Surface area of the star <a href="/facts/Vega/G3wJwhhl">Vega</a></td></tr><tr><td>1020</td><td> </td><td> 100 Gm2</td><td> </td></tr><tr><td>1021</td><td>1 <a href="/facts/Metric_prefix/Y2MzkaeL">zetta</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> Z(m2)</td><td>1 000 Gm2</td><td></td></tr><tr><td rowspan="3">1022</td><td rowspan="3"> </td><td>11 000 Gm2</td><td>Area swept by <a href="/facts/Mercury_(planet)/lVa1GIyX">Mercury's</a> orbit around the Sun</td></tr><tr><td>37 000 Gm2</td><td>Area swept by <a href="/facts/Venus/pADnueP6">Venus</a>' orbit around the Sun</td></tr><tr><td>71 000 Gm2</td><td>Area swept by <a href="/facts/Earth/HLLmDfj0">Earth</a>'s orbit around the Sun</td></tr><tr><td rowspan="2">1023</td><td rowspan="2"> </td><td>160 000 Gm2</td><td>Area swept by <a href="/facts/Mars/AQGtVvz0">Mars</a>' orbit around the Sun</td></tr><tr><td>281 000 Gm2</td><td>Surface area of a <a href="/facts/Dyson_sphere/1xLU6xd3">Dyson sphere</a> with a radius of 1 AU</td></tr><tr><td rowspan="3">1024</td><td rowspan="3">1 <a href="/facts/Yotta-/SI1rfzW1">yotta</a> <a href="/facts/Square_metre/u5nT9y0W">square meter</a> (m2)<p>1 square <a href="/facts/Terametre/YzL1bHGX">terametre</a> (Tm2)</p></td><td>1.9 Tm2</td><td>Area swept by <a href="/facts/Jupiter/95m7XjMT">Jupiter</a>'s orbit around the Sun</td></tr><tr><td>6.4 Tm2</td><td>Area swept by <a href="/facts/Saturn/D54LcGJ9">Saturn</a>'s orbit around the Sun</td></tr><tr><td>8.5 Tm2</td><td>Surface area of the <a href="/facts/Red_supergiant/hPBWvABE">red supergiant</a> star <a href="/facts/Betelgeuse/BsD9Ap7C">Betelgeuse</a></td></tr><tr><td rowspan="3">1025</td><td rowspan="3"> </td><td>24 Tm2</td><td>Surface area of the <a href="/facts/Hypergiant/Q95EmMhT">hypergiant</a> star <a href="/facts/VY_Canis_Majoris/pdF78cT2">VY Canis Majoris</a></td></tr><tr><td>26 Tm2</td><td>Area swept by <a href="/facts/Uranus/x7YwT1ar">Uranus</a>' orbit around the Sun</td></tr><tr><td>64 Tm2</td><td>Area swept by <a href="/facts/Neptune/1eucwHIC">Neptune</a>'s orbit around the Sun</td></tr><tr><td>1026</td><td> </td><td>110 Tm2</td><td>Area swept by <a href="/facts/Pluto/egq7MBeR">Pluto</a>'s orbit around the Sun</td></tr></tbody></table> <h2 id="1027-square-metres-and-larger">1027 square metres and larger</h2> List of orders of magnitude for <a href="/facts/Area/KsNG1G9t">areas</a> 1027 square metres and larger.<table><tbody><tr><th>Factor (m2)</th><th>Multiple</th><th>Value</th><th>Item</th></tr><tr><td>1030</td><td>1 square <a href="/facts/Petametre/YzL1bHGX">petametre</a> (Pm2)</td><td></td><td></td></tr><tr><td>1031</td><td></td><td>10 Pm2</td><td></td></tr><tr><td rowspan="2">1032</td><td></td><td>200 Pm2</td><td>Roughly the surface area of an <a href="/facts/Oort_Cloud/wdP3VNxd">Oort Cloud</a></td></tr><tr><td></td><td>300 Pm2</td><td>Roughly the surface area of a <a href="/facts/Bok_globule/qjn2eW7e">Bok globule</a></td></tr><tr><td>1033</td><td></td><td>1 000 Pm2</td><td></td></tr><tr><td>1034</td><td></td><td>30 000 Pm2</td><td>Roughly the surface area of <a href="/facts/NGC_7635/qhBQsNCn">The Bubble</a> nebula</td></tr><tr><td>1035</td><td></td><td>100 000 Pm2</td><td></td></tr><tr><td>1036</td><td>1 square <a href="/facts/Exametre/YzL1bHGX">exametre</a> (Em2)</td><td></td><td></td></tr><tr><td colspan="4">...</td></tr><tr><td>1041</td><td></td><td>700 000 Em2</td><td>Roughly the area of <a href="/facts/Milky_Way/ulF6lccN">Milky Way</a>'s galactic disk</td></tr><tr><td>1042</td><td>1 square <a href="/facts/Zettametre/YzL1bHGX">zettametre</a> (Zm2)</td><td></td><td></td></tr><tr><td colspan="4">...</td></tr><tr><td>1048</td><td>1 square <a href="/facts/Yottametre/YzL1bHGX">yottametre</a> (Ym2)</td><td></td><td></td></tr><tr><td>1054</td><td>1 square <a href="/facts/Ronnametre/hPhzc1CV">ronnametre</a> (Rm2)</td><td>2.4 Rm2</td><td>Surface area of the observable universe<a class="footnote-ref" id="fnref:97" href="#fn:97"><sup>97</sup></a></td></tr></tbody></table> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Orders_of_magnitude/cWzRP2dM">Orders of magnitude</a></li> <li><a href="/facts/List_of_political_and_geographic_subdivisions_by_total_area/nH29TrIM">List of political and geographic subdivisions by total area</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Calculated: square of the Planck length = (1.62e-35 m)^2 = 2.6e-70 m^2 <a href="/wiki/Planck_length" target="_blank">/wiki/Planck_length</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Russ Rowlett (September 1, 2004). "Units: S". How Many? A Dictionary of Units of Measurement. University of North Carolina at Chapel Hill. Retrieved 2011-10-25. <a href="http://www.unc.edu/~rowlett/units/dictS.html" target="_blank">http://www.unc.edu/~rowlett/units/dictS.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Femtobarn". CERN writing guidelines. CERN. Retrieved 2015-10-22. <a href="http://writing-guidelines.web.cern.ch/entries/femtobarn" target="_blank">http://writing-guidelines.web.cern.ch/entries/femtobarn</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Eric W. Weisstein. "Thomson Cross Section". Eric Weisstein's World of Science. Wolfram Research. Retrieved 2015-10-22. <a href="http://scienceworld.wolfram.com/physics/ThomsonCrossSection.html" target="_blank">http://scienceworld.wolfram.com/physics/ThomsonCrossSection.html</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Other non-SI units". SI brochure. BIPM. Archived from the original on 2008-08-21. Retrieved 2011-10-25. <a href="https://web.archive.org/web/20080821211324/http://www.bipm.org/en/si/si_brochure/chapter4/table8.html" target="_blank">https://web.archive.org/web/20080821211324/http://www.bipm.org/en/si/si_brochure/chapter4/table8.html</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>""Rule of thumb" for the area per molecule in lipid bilayer". BioNumbers. Retrieved 2011-10-09. <a href="http://bionumbers.hms.harvard.edu/bionumber.aspx?s=n&id=101837" target="_blank">http://bionumbers.hms.harvard.edu/bionumber.aspx?s=n&id=101837</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"Individual Properties of the 20 Standard Amino Acids: Properties and Images". The Amino Acid Repository. Jena Library of Biological Macromolecules. Retrieved 2011-10-10. <a href="http://jenalib.leibniz-fli.de/IMAGE_AA.html" target="_blank">http://jenalib.leibniz-fli.de/IMAGE_AA.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Janin, J. E. L. (1979). "Surface and inside volumes in globular proteins". Nature. 277 (5696): 491–492. Bibcode:1979Natur.277..491J. doi:10.1038/277491a0. PMID 763335. S2CID 4338901. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>"The Nuclear Pore Complex". UIUC Theoretical and Computational Biophysics Group. Retrieved 2011-10-14. <a href="http://www.ks.uiuc.edu/Research/npc/" target="_blank">http://www.ks.uiuc.edu/Research/npc/</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>"E. coli Statistics". The CyberCell Database. Archived from the original on 2011-10-27. Retrieved 2011-09-11. <a href="https://web.archive.org/web/20111027220034/http://www.ccdb.ualberta.ca/CCDB/cgi-bin/STAT_NEW.cgi" target="_blank">https://web.archive.org/web/20111027220034/http://www.ccdb.ualberta.ca/CCDB/cgi-bin/STAT_NEW.cgi</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>Marcelli, Gianluca; Parker, Kim H.; Winlove, C. Peter (2005). "Thermal Fluctuations of Red Blood Cell Membrane via a Constant-Area Particle-Dynamics Model". Biophysical Journal. 89 (4): 2473–2480. Bibcode:2005BpJ....89.2473M. doi:10.1529/biophysj.104.056168. PMC 1366746. PMID 16055528. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1366746" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1366746</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Calculated: Smallest and largest common pitches were 77 micrometers and 337 micrometers. (77e-6 m)^2 ~= 6e-9 m^2. (337e-6 m)^2 ~= 114e-9 m^2 ~= 110e-9 m^2 <a href="/wiki/Dot_pitch#Common_dot_pitches_in_monitors" target="_blank">/wiki/Dot_pitch#Common_dot_pitches_in_monitors</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Calculated: (300 dots per inch / 2.54e-2 m/inch)^(-2) = 7.2e-9 m^2 <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>"Hair Fiber Composition". Retrieved 2011-09-30. <a href="http://www.keratin.com/aa/aa012.shtml#04" target="_blank">http://www.keratin.com/aa/aa012.shtml#04</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>Calculated: 100 μm in diameter => pi * ((1e-4 m)/2)**2 = 7.9e-9 m^2 <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>Calculated: pi * (0.5mm/2)^2 = 2.0e-7 m^2 and pi * (0.7mm/2)^2 = 3.8e-7 m^2) <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>"Part XIII: Facts and Figures concerning the human retina". Webvision. University of Utah. Archived from the original on 2011-10-11. Retrieved 2011-09-28. <a href="https://web.archive.org/web/20111011004153/http://webvision.med.utah.edu/book/part-xiii-cellular-remodeling-in-mammalian-retina-induced-by-retinal-detachment/" target="_blank">https://web.archive.org/web/20111011004153/http://webvision.med.utah.edu/book/part-xiii-cellular-remodeling-in-mammalian-retina-induced-by-retinal-detachment/</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>Calculated: ((6e-3 m)/2)**2 * pi = 2.8e-5 m^2 and ((8e-3 m)/2)**2 * pi = 5.0e-5 m^2 <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>"Coin specifications". United States Mint. Retrieved 2011-12-28. <a href="https://www.usmint.gov/about_the_mint/?action=coin_specifications" target="_blank">https://www.usmint.gov/about_the_mint/?action=coin_specifications</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>Calculated: area = pi * diameter^2 / 4 = 3.14 * (19.05e-3 m)^2 = 2.850e-4 m^2 <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> <li id="fn:21"><p>Taylor, Enid; Jennings, Alan (1971). "Calculation of total retinal area". Br. J. Ophthalmol. 55 (4): 262–5. doi:10.1136/bjo.55.4.262. PMC 1208280. PMID 5572268. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1208280" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1208280</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></p></li> <li id="fn:22"><p>"Credit Card Dimensions". Retrieved 2011-09-30. <a href="http://www.dimensionsguide.com/credit-card-dimensions/" target="_blank">http://www.dimensionsguide.com/credit-card-dimensions/</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></p></li> <li id="fn:23"><p>Calculated: 3 inches * 5 inches * (2.54e-2 m/inch)^2 = 9.7e-3 m^2 ~= 0.01 m^2 <a href="#fnref:23" class="footnote-back-ref">↩</a></p></li> <li id="fn:24"><p>Calculated: 1 foot * 1 foot * (0.3048 meters / foot)^2 = 0.092.90304 m^2 <a href="#fnref:24" class="footnote-back-ref">↩</a></p></li> <li id="fn:25"><p>"Rules of the Game". USA Basketball. Archived from the original on 2011-10-27. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20111027183121/http://www.usabasketball.com/rules/rules.html" target="_blank">https://web.archive.org/web/20111027183121/http://www.usabasketball.com/rules/rules.html</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></p></li> <li id="fn:26"><p>Calculated: 29.5-29.75 inch circumference * 2.54 cm / in = 23.85-24.05 cm diameter => radius = 0.119-0.120 m => Area = 4 * pi * (0.119 m)^2 = 0.18 m^2 <a href="#fnref:26" class="footnote-back-ref">↩</a></p></li> <li id="fn:27"><p>Sacco, Joseph J.; Botten, Joanne; Macbeth, Fergus; Bagust, Adrian; Clark, Peter (2010). "The Average Body Surface Area of Adult Cancer Patients in the UK: A Multicentre Retrospective Study". PLOS ONE. 5 (1): e8933. Bibcode:2010PLoSO...5.8933S. doi:10.1371/journal.pone.0008933. PMC 2812484. PMID 20126669. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812484" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2812484</a> <a href="#fnref:27" class="footnote-back-ref">↩</a></p></li> <li id="fn:28"><p>Notter, Robert H. (2000). Lung surfactants: basic science and clinical applications. New York, N.Y: Marcel Dekker. p. 120. ISBN 0-8247-0401-0. Retrieved 2011-09-27. <a href="0-8247-0401-0" target="_blank">0-8247-0401-0</a> <a href="#fnref:28" class="footnote-back-ref">↩</a></p></li> <li id="fn:29"><p>"Section 1.1" (PDF). Official Volleyball Rules 2011-2012. FIVB. 2010. Retrieved 2011-10-27. The playing court is a rectangle measuring 18 x 9 m, surrounded by a free zone which is a minimum of 3 m wide on all sides. <a href="http://www.fivb.org/EN/Refereeing-Rules/Documents/FIVB.2011-2012.VB.RulesOfTheGame.Eng.TextfileOnly.2.1.1.pdf" target="_blank">http://www.fivb.org/EN/Refereeing-Rules/Documents/FIVB.2011-2012.VB.RulesOfTheGame.Eng.TextfileOnly.2.1.1.pdf</a> <a href="#fnref:29" class="footnote-back-ref">↩</a></p></li> <li id="fn:30"><p>"Median and Average Square Feet of Floor Area in New Single-Family Houses Completed by Location" (PDF). US Census Bureau. Retrieved 2011-09-26. <a href="https://www.census.gov/const/C25Ann/sftotalmedavgsqft.pdf" target="_blank">https://www.census.gov/const/C25Ann/sftotalmedavgsqft.pdf</a> <a href="#fnref:30" class="footnote-back-ref">↩</a></p></li> <li id="fn:31"><p>"Area of a Tennis Court". The Physics Factbook. Retrieved 2011-09-27. <a href="http://hypertextbook.com/facts/2009/AmyHuang.shtml" target="_blank">http://hypertextbook.com/facts/2009/AmyHuang.shtml</a> <a href="#fnref:31" class="footnote-back-ref">↩</a></p></li> <li id="fn:32"><p>Calculated: 4,700 sq ft * (0.3048 ft/m)2 = 436.644288 m2 <a href="#fnref:32" class="footnote-back-ref">↩</a></p></li> <li id="fn:33"><p>"A380 Prestige Specifications" (PDF). Airbus. Archived from the original (PDF) on 12 October 2016. <a href="https://web.archive.org/web/20161012152549/http://www.airbus.com/fileadmin/media_gallery/files/tech_data/jetFamily/media_object_file_A380_specifications.pdf" target="_blank">https://web.archive.org/web/20161012152549/http://www.airbus.com/fileadmin/media_gallery/files/tech_data/jetFamily/media_object_file_A380_specifications.pdf</a> <a href="#fnref:33" class="footnote-back-ref">↩</a></p></li> <li id="fn:34"><p>"Extremely Large Telescope - Timeline". Retrieved 11 July 2023. <a href="https://elt.eso.org/about/timeline/" target="_blank">https://elt.eso.org/about/timeline/</a> <a href="#fnref:34" class="footnote-back-ref">↩</a></p></li> <li id="fn:35"><p>Calculated: 50 m * 25 m = 1250 m^2 <a href="#fnref:35" class="footnote-back-ref">↩</a></p></li> <li id="fn:36"><p>"General Tables of Units of Measurement" (PDF). NIST. Archived from the original (PDF) on 2006-11-26. Retrieved 2011-10-28. 4046.87 <a href="https://web.archive.org/web/20061126120208/http://ts.nist.gov/WeightsAndMeasures/Publications/upload/h4402_appenc.pdf" target="_blank">https://web.archive.org/web/20061126120208/http://ts.nist.gov/WeightsAndMeasures/Publications/upload/h4402_appenc.pdf</a> <a href="#fnref:36" class="footnote-back-ref">↩</a></p></li> <li id="fn:37"><p>"What are the Dimensions of a Football Field". Dimensions Guide. Retrieved 2011-10-27. <a href="http://www.dimensionsguide.com/what-are-the-dimensions-of-a-football-field/" target="_blank">http://www.dimensionsguide.com/what-are-the-dimensions-of-a-football-field/</a> <a href="#fnref:37" class="footnote-back-ref">↩</a></p></li> <li id="fn:38"><p>Calculated: 360 feet * 160 feet * (0.3048 m/ft)^2 = 5351 m^2 ~= 5400 m^2 <a href="#fnref:38" class="footnote-back-ref">↩</a></p></li> <li id="fn:39"><p>"How Big Is An Olympic Soccer Field?". LIVESTRONG.COM. Retrieved 2012-01-04. For the Olympics, fields are supposed to measure exactly 105 meters long and 68 meters wide <a href="http://www.livestrong.com/article/406257-how-big-is-an-olympic-soccer-field/" target="_blank">http://www.livestrong.com/article/406257-how-big-is-an-olympic-soccer-field/</a> <a href="#fnref:39" class="footnote-back-ref">↩</a></p></li> <li id="fn:40"><p>Calculated: 105 m * 68 m = 7140 m^2 <a href="#fnref:40" class="footnote-back-ref">↩</a></p></li> <li id="fn:41"><p>"General Tables of Units of Measurement" (PDF). NIST. Archived from the original (PDF) on 2006-11-26. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20061126120208/http://ts.nist.gov/WeightsAndMeasures/Publications/upload/h4402_appenc.pdf" target="_blank">https://web.archive.org/web/20061126120208/http://ts.nist.gov/WeightsAndMeasures/Publications/upload/h4402_appenc.pdf</a> <a href="#fnref:41" class="footnote-back-ref">↩</a></p></li> <li id="fn:42"><p>"AFL Ground Sizes | Passy's World of Mathematics". passyworldofmathematics.com. 11 September 2011. Retrieved 2016-11-12. <a href="http://passyworldofmathematics.com/afl-ground-sizes/" target="_blank">http://passyworldofmathematics.com/afl-ground-sizes/</a> <a href="#fnref:42" class="footnote-back-ref">↩</a></p></li> <li id="fn:43"><p>Greenberg, Ralph. "THE GREAT PYRAMID OF GIZA (Some Elegant Numerical Relationships)". Retrieved 2012-01-04. average length of the four sides is 230.364 meters <a href="http://www.math.washington.edu/~greenber/GizaPyramid.html" target="_blank">http://www.math.washington.edu/~greenber/GizaPyramid.html</a> <a href="#fnref:43" class="footnote-back-ref">↩</a></p></li> <li id="fn:44"><p>Calculated: 230.364 m^2 ~= 53068 m^2 <a href="#fnref:44" class="footnote-back-ref">↩</a></p></li> <li id="fn:45"><p>Gartland, Fiona. "Valuable lead roofing stolen from Dublin bandstands". Archived from the original on 30 May 2018. Retrieved 29 May 2018. <a href="https://www.irishtimes.com/news/valuable-lead-roofing-stolen-from-dublin-bandstands-1.485412" target="_blank">https://www.irishtimes.com/news/valuable-lead-roofing-stolen-from-dublin-bandstands-1.485412</a> <a href="#fnref:45" class="footnote-back-ref">↩</a></p></li> <li id="fn:46"><p>"Holy See (Vatican City)". The World Factbook. Central Intelligence Agency. Retrieved 2011-10-28. <a href="https://www.cia.gov/the-world-factbook/countries/holy-see-vatican-city/" target="_blank">https://www.cia.gov/the-world-factbook/countries/holy-see-vatican-city/</a> <a href="#fnref:46" class="footnote-back-ref">↩</a></p></li> <li id="fn:47"><p>"The Pentagon - George Bergstrom". Great Buildings Online. Retrieved 2011-10-28. Floor area of 6.5 million square feet, 34 acres, 13.8 hectares, of which 3.7 million square feet are used for offices. <a href="http://www.greatbuildings.com/buildings/The_Pentagon.html" target="_blank">http://www.greatbuildings.com/buildings/The_Pentagon.html</a> <a href="#fnref:47" class="footnote-back-ref">↩</a></p></li> <li id="fn:48"><p>Holland, Oscar (2023-07-18). "The world's new largest office building is bigger than the Pentagon". CNN. Retrieved 2024-11-07. <a href="https://edition.cnn.com/style/india-largest-office-building-surat-diamond-bourse/index.html" target="_blank">https://edition.cnn.com/style/india-largest-office-building-surat-diamond-bourse/index.html</a> <a href="#fnref:48" class="footnote-back-ref">↩</a></p></li> <li id="fn:49"><p>"Monaco". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-30. <a href="https://www.cia.gov/the-world-factbook/countries/monaco/" target="_blank">https://www.cia.gov/the-world-factbook/countries/monaco/</a> <a href="#fnref:49" class="footnote-back-ref">↩</a></p></li> <li id="fn:50"><p>Calculated: 1 mile * 1 mile * (1.61 km / mile)^2 = 2.59 km^2 <a href="#fnref:50" class="footnote-back-ref">↩</a></p></li> <li id="fn:51"><p>"Jurisdictions: London". The International Finance Centre Portal. Retrieved 2011-10-28. <a href="http://www.internationalfinancecentres.com/jurisdictions/view/41" target="_blank">http://www.internationalfinancecentres.com/jurisdictions/view/41</a> <a href="#fnref:51" class="footnote-back-ref">↩</a></p></li> <li id="fn:52"><p>"New York -- Place and County Subdivision: Population, Housing Units, Area, and Density 2000". Census 2000 Summary File 1. US Census Bureau. Archived from the original on 2011-01-03. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20110103055349/http://factfinder.census.gov/servlet/GCTTable?_bm=y&-geo_id=04000US36&-_box_head_nbr=GCT-PH1-R&-ds_name=DEC_2000_SF1_U&-_lang=en&-redoLog=false&-mt_name=PEP_2006_EST_GCTT1_ST2&-format=ST-7S&-_sse=on" target="_blank">https://web.archive.org/web/20110103055349/http://factfinder.census.gov/servlet/GCTTable?_bm=y&-geo_id=04000US36&-_box_head_nbr=GCT-PH1-R&-ds_name=DEC_2000_SF1_U&-_lang=en&-redoLog=false&-mt_name=PEP_2006_EST_GCTT1_ST2&-format=ST-7S&-_sse=on</a> <a href="#fnref:52" class="footnote-back-ref">↩</a></p></li> <li id="fn:53"><p>"San Marino". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-30. <a href="https://www.cia.gov/the-world-factbook/countries/san-marino/" target="_blank">https://www.cia.gov/the-world-factbook/countries/san-marino/</a> <a href="#fnref:53" class="footnote-back-ref">↩</a></p></li> <li id="fn:54"><p>"Comparateur de territoire: Commune de Paris (75056)". INSEE. Retrieved 2020-08-26. <a href="https://www.insee.fr/fr/statistiques/1405599?geo=COM-75056" target="_blank">https://www.insee.fr/fr/statistiques/1405599?geo=COM-75056</a> <a href="#fnref:54" class="footnote-back-ref">↩</a></p></li> <li id="fn:55"><p>"Walt Disney World Resort". Disney By The Numb3rs. Archived from the original on 2015-06-12. Retrieved 2011-10-28. 30,500 acres <a href="https://web.archive.org/web/20150612090638/http://disneybythenumbers.com/wdw/wdw.html" target="_blank">https://web.archive.org/web/20150612090638/http://disneybythenumbers.com/wdw/wdw.html</a> <a href="#fnref:55" class="footnote-back-ref">↩</a></p></li> <li id="fn:56"><p>"Appendix II Statistics". Taipei Yearbook 2010. Archived from the original on 2012-05-22. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20120522053744/http://tcgwww.taipei.gov.tw/ct.asp?xItem=6499588&ctNode=45847&mp=100089" target="_blank">https://web.archive.org/web/20120522053744/http://tcgwww.taipei.gov.tw/ct.asp?xItem=6499588&ctNode=45847&mp=100089</a> <a href="#fnref:56" class="footnote-back-ref">↩</a></p></li> <li id="fn:57"><p>"Population and Dwelling Counts". 2001 Census. Statistics Canada. Retrieved 2011-10-28. <a href="http://www12.statcan.ca/english/census01/products/standard/popdwell/Table-CSD-P.cfm?PR=35&T=2&SR=1&S=3&O=D" target="_blank">http://www12.statcan.ca/english/census01/products/standard/popdwell/Table-CSD-P.cfm?PR=35&T=2&SR=1&S=3&O=D</a> <a href="#fnref:57" class="footnote-back-ref">↩</a></p></li> <li id="fn:58"><p>"Hong Kong". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/hong-kong/" target="_blank">https://www.cia.gov/the-world-factbook/countries/hong-kong/</a> <a href="#fnref:58" class="footnote-back-ref">↩</a></p></li> <li id="fn:59"><p>"California by Place: Los Angeles city". US Census. Archived from the original on 2020-02-12. Retrieved 2011-10-28. 498.29 square miles <a href="https://archive.today/20200212034038/http://factfinder.census.gov/servlet/GCTTable?-geo_id=04000US06&-mt_name=DEC_2000_SF1_U_GCTPH1_ST7&-ds_name=DEC_2000_SF1_U" target="_blank">https://archive.today/20200212034038/http://factfinder.census.gov/servlet/GCTTable?-geo_id=04000US06&-mt_name=DEC_2000_SF1_U_GCTPH1_ST7&-ds_name=DEC_2000_SF1_U</a> <a href="#fnref:59" class="footnote-back-ref">↩</a></p></li> <li id="fn:60"><p>"Cities with 100,000 or More Population in 2000 ranked by Land Area (square miles) /1, 2000 in Rank Order". U.S. Census Bureau, Administrative and Customer Services Division, Statistical Compendia Branch. March 16, 2004. Archived from the original on October 17, 2002. Retrieved 2010-10-26. <a href="https://web.archive.org/web/20021017211112/http://www.census.gov/statab/ccdb/cit1010r.txt" target="_blank">https://web.archive.org/web/20021017211112/http://www.census.gov/statab/ccdb/cit1010r.txt</a> <a href="#fnref:60" class="footnote-back-ref">↩</a></p></li> <li id="fn:61"><p>"OVERVIEW OF TOKYO". Tokyo Metropolitan Government. Archived from the original on 2011-11-08. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20111108043249/http://www.metro.tokyo.jp/ENGLISH/PROFILE/overview02.htm" target="_blank">https://web.archive.org/web/20111108043249/http://www.metro.tokyo.jp/ENGLISH/PROFILE/overview02.htm</a> <a href="#fnref:61" class="footnote-back-ref">↩</a></p></li> <li id="fn:62"><p>"Kabupaten Klungkung : Data Agregat per Kecamatan" (PDF). Sp2010.bps.go.id. 2010. Retrieved 5 January 2018. <a href="http://sp2010.bps.go.id/files/ebook/5105.pdf" target="_blank">http://sp2010.bps.go.id/files/ebook/5105.pdf</a> <a href="#fnref:62" class="footnote-back-ref">↩</a></p></li> <li id="fn:63"><p>"Jamaica". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/jamaica/" target="_blank">https://www.cia.gov/the-world-factbook/countries/jamaica/</a> <a href="#fnref:63" class="footnote-back-ref">↩</a></p></li> <li id="fn:64"><p>"Lake Profile: Victoria". World Lakes. LakeNet. Archived from the original on November 27, 2003. Retrieved 2011-10-28. <a href="https://web.archive.org/web/20031127214325/http://www.worldlakes.org/lakedetails.asp?lakeid=8361" target="_blank">https://web.archive.org/web/20031127214325/http://www.worldlakes.org/lakedetails.asp?lakeid=8361</a> <a href="#fnref:64" class="footnote-back-ref">↩</a></p></li> <li id="fn:65"><p>"Austria". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/austria/" target="_blank">https://www.cia.gov/the-world-factbook/countries/austria/</a> <a href="#fnref:65" class="footnote-back-ref">↩</a></p></li> <li id="fn:66"><p>"South Korea". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/iceland/" target="_blank">https://www.cia.gov/the-world-factbook/countries/iceland/</a> <a href="#fnref:66" class="footnote-back-ref">↩</a></p></li> <li id="fn:67"><p>The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="#fnref:67" class="footnote-back-ref">↩</a></p></li> <li id="fn:68"><p>"Italy". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/italy/" target="_blank">https://www.cia.gov/the-world-factbook/countries/italy/</a> <a href="#fnref:68" class="footnote-back-ref">↩</a></p></li> <li id="fn:69"><p>"Germany". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/italy/" target="_blank">https://www.cia.gov/the-world-factbook/countries/italy/</a> <a href="#fnref:69" class="footnote-back-ref">↩</a></p></li> <li id="fn:70"><p>"Japan". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/italy/" target="_blank">https://www.cia.gov/the-world-factbook/countries/italy/</a> <a href="#fnref:70" class="footnote-back-ref">↩</a></p></li> <li id="fn:71"><p>"Spain". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/spain/" target="_blank">https://www.cia.gov/the-world-factbook/countries/spain/</a> <a href="#fnref:71" class="footnote-back-ref">↩</a></p></li> <li id="fn:72"><p>"Turkey". The World Factbook. Central Intelligence Agency. Archived from the original on January 10, 2021. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20210110073821/https://www.cia.gov/the-world-factbook/countries/turkey" target="_blank">https://web.archive.org/web/20210110073821/https://www.cia.gov/the-world-factbook/countries/turkey</a> <a href="#fnref:72" class="footnote-back-ref">↩</a></p></li> <li id="fn:73"><p>"Egypt". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/egypt/" target="_blank">https://www.cia.gov/the-world-factbook/countries/egypt/</a> <a href="#fnref:73" class="footnote-back-ref">↩</a></p></li> <li id="fn:74"><p>Rosstat (Russian Statistical Service), 2010 Archived 2012-10-18 at the Wayback Machine (xls). Retrieved 2012-06-15. <a href="http://www.gks.ru/bgd/free/b10_107/IssWWW.exe/Stg//%3Cextid%3E/%3Cstoragepath%3E::%7Ctab1-01-09.xls" target="_blank">http://www.gks.ru/bgd/free/b10_107/IssWWW.exe/Stg//%3Cextid%3E/%3Cstoragepath%3E::%7Ctab1-01-09.xls</a> <a href="#fnref:74" class="footnote-back-ref">↩</a></p></li> <li id="fn:75"><p>Turchin, Peter; Adams, Jonathan M.; Hall, Thomas D (December 2006). "East-West Orientation of Historical Empires". Journal of World-Systems Research. 12 (2): 222. ISSN 1076-156X. Retrieved 2016-09-16. <a href="http://jwsr.pitt.edu/ojs/index.php/jwsr/article/view/369/381" target="_blank">http://jwsr.pitt.edu/ojs/index.php/jwsr/article/view/369/381</a> <a href="#fnref:75" class="footnote-back-ref">↩</a></p></li> <li id="fn:76"><p>Taagepera, Rein (1979). "Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D.". Social Science History. 3 (3/4): 125. doi:10.2307/1170959. JSTOR 1170959. <a href="/wiki/Doi_(identifier)" target="_blank">/wiki/Doi_(identifier)</a> <a href="#fnref:76" class="footnote-back-ref">↩</a></p></li> <li id="fn:77"><p>"Australia". The World Factbook. Central Intelligence Agency. Retrieved 2011-10-28. <a href="https://www.cia.gov/the-world-factbook/countries/australia/" target="_blank">https://www.cia.gov/the-world-factbook/countries/australia/</a> <a href="#fnref:77" class="footnote-back-ref">↩</a></p></li> <li id="fn:78"><p>"Canada". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/canada/" target="_blank">https://www.cia.gov/the-world-factbook/countries/canada/</a> <a href="#fnref:78" class="footnote-back-ref">↩</a></p></li> <li id="fn:79"><p>"Antarctica". The World Factbook. Central Intelligence Agency. Retrieved 2011-10-28. <a href="https://www.cia.gov/the-world-factbook/countries/antarctica/" target="_blank">https://www.cia.gov/the-world-factbook/countries/antarctica/</a> <a href="#fnref:79" class="footnote-back-ref">↩</a></p></li> <li id="fn:80"><p>"FAO Resources page". FAO.org. 2010. <a href="http://www.fao.org/economic/ess/ess-publications/ess-yearbook/ess-yearbook2010/yearbook2010-reources/en/" target="_blank">http://www.fao.org/economic/ess/ess-publications/ess-yearbook/ess-yearbook2010/yearbook2010-reources/en/</a> <a href="#fnref:80" class="footnote-back-ref">↩</a></p></li> <li id="fn:81"><p>"Pluto: By the Numbers". Solar System Exploration. NASA. Archived from the original on 2015-09-28. Retrieved 2015-12-11. <a href="https://web.archive.org/web/20150928233048/http://solarsystem.nasa.gov/planets/pluto/facts" target="_blank">https://web.archive.org/web/20150928233048/http://solarsystem.nasa.gov/planets/pluto/facts</a> <a href="#fnref:81" class="footnote-back-ref">↩</a></p></li> <li id="fn:82"><p>"Russia". The World Factbook. Central Intelligence Agency. Retrieved 2011-09-29. <a href="https://www.cia.gov/the-world-factbook/countries/russia/" target="_blank">https://www.cia.gov/the-world-factbook/countries/russia/</a> <a href="#fnref:82" class="footnote-back-ref">↩</a></p></li> <li id="fn:83"><p>"Map of Africa". Worldatlas.com. Retrieved 2012-01-04. 30,065,000 sq km <a href="http://www.worldatlas.com/webimage/countrys/af.htm" target="_blank">http://www.worldatlas.com/webimage/countrys/af.htm</a> <a href="#fnref:83" class="footnote-back-ref">↩</a></p></li> <li id="fn:84"><p>Rein Taagepera (September 1997). "Expansion and Contraction Patterns of Large Polities: Context for Russia" (PDF). International Studies Quarterly. 41 (3): 502. doi:10.1111/0020-8833.00053. JSTOR 2600793. <a href="/wiki/Rein_Taagepera" target="_blank">/wiki/Rein_Taagepera</a> <a href="#fnref:84" class="footnote-back-ref">↩</a></p></li> <li id="fn:85"><p>"Earth's Moon: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2004-02-24. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20040224174315/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Moon&Display=Facts" target="_blank">https://web.archive.org/web/20040224174315/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Moon&Display=Facts</a> <a href="#fnref:85" class="footnote-back-ref">↩</a></p></li> <li id="fn:86"><p>"Indian Ocean - The World Factbook". www.cia.gov. Retrieved 2024-11-07. <a href="https://www.cia.gov/the-world-factbook/oceans/indian-ocean/" target="_blank">https://www.cia.gov/the-world-factbook/oceans/indian-ocean/</a> <a href="#fnref:86" class="footnote-back-ref">↩</a></p></li> <li id="fn:87"><p>"The World Factbook: Atlantic Ocean". Central Intelligence Agency. 2011-03-24. Retrieved 2011-09-30. <a href="https://www.cia.gov/the-world-factbook/oceans/atlantic-ocean/" target="_blank">https://www.cia.gov/the-world-factbook/oceans/atlantic-ocean/</a> <a href="#fnref:87" class="footnote-back-ref">↩</a></p></li> <li id="fn:88"><p>"Mars: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2003-12-15. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20031215145455/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mars&Display=Facts" target="_blank">https://web.archive.org/web/20031215145455/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mars&Display=Facts</a> <a href="#fnref:88" class="footnote-back-ref">↩</a></p></li> <li id="fn:89"><p>"The World Factbook: World". Central Intelligence Agency. 2011-08-31. Retrieved 2011-09-27. <a href="https://www.cia.gov/the-world-factbook/countries/world/" target="_blank">https://www.cia.gov/the-world-factbook/countries/world/</a> <a href="#fnref:89" class="footnote-back-ref">↩</a></p></li> <li id="fn:90"><p>"The World Factbook: Pacific Ocean". Central Intelligence Agency. 2011-11-17. Retrieved 2011-09-30. <a href="https://www.cia.gov/the-world-factbook/oceans/pacific-ocean/" target="_blank">https://www.cia.gov/the-world-factbook/oceans/pacific-ocean/</a> <a href="#fnref:90" class="footnote-back-ref">↩</a></p></li> <li id="fn:91"><p>"The World Factbook: World". Central Intelligence Agency. 2011-08-31. Retrieved 2011-09-27. <a href="https://www.cia.gov/the-world-factbook/countries/world/" target="_blank">https://www.cia.gov/the-world-factbook/countries/world/</a> <a href="#fnref:91" class="footnote-back-ref">↩</a></p></li> <li id="fn:92"><p>"The World Factbook: World". Central Intelligence Agency. 2011-08-31. Retrieved 2011-09-27. <a href="https://www.cia.gov/the-world-factbook/countries/world/" target="_blank">https://www.cia.gov/the-world-factbook/countries/world/</a> <a href="#fnref:92" class="footnote-back-ref">↩</a></p></li> <li id="fn:93"><p>"Neptune: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2003-12-15. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20031215224327/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Neptune&Display=Facts" target="_blank">https://web.archive.org/web/20031215224327/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Neptune&Display=Facts</a> <a href="#fnref:93" class="footnote-back-ref">↩</a></p></li> <li id="fn:94"><p>"Saturn: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2004-02-24. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20040224191458/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Saturn&Display=Facts" target="_blank">https://web.archive.org/web/20040224191458/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Saturn&Display=Facts</a> <a href="#fnref:94" class="footnote-back-ref">↩</a></p></li> <li id="fn:95"><p>"Jupiter: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2003-12-15. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20031215141351/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Jupiter&Display=Facts" target="_blank">https://web.archive.org/web/20031215141351/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Jupiter&Display=Facts</a> <a href="#fnref:95" class="footnote-back-ref">↩</a></p></li> <li id="fn:96"><p>"Sun: Facts & Figures". Solar System Exploration. NASA. Archived from the original on 2011-07-03. Retrieved 2011-09-29. <a href="https://web.archive.org/web/20110703081045/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Sun&Display=Facts" target="_blank">https://web.archive.org/web/20110703081045/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Sun&Display=Facts</a> <a href="#fnref:96" class="footnote-back-ref">↩</a></p></li> <li id="fn:97"><p>"Wolfram|Alpha: Computational Knowledge Engine". www.wolframalpha.com. Retrieved 2016-03-01. <a href="http://www.wolframalpha.com/input/?i=4*pi*(radius+of+observable+universe)%5E2" target="_blank">http://www.wolframalpha.com/input/?i=4*pi*(radius+of+observable+universe)%5E2</a> <a href="#fnref:97" class="footnote-back-ref">↩</a></p></li> </ol>