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Cluster II (spacecraft)
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<h2 id="mission-overview">Mission overview</h2> <p>The four identical Cluster II satellites studied the impact of the Sun's activity on the Earth's space environment by flying in formation around Earth. For the first time in space history, this mission was able to collect three-dimensional information on how the <a href="/facts/Solar_wind/BvuB3dT8">solar wind</a> interacts with the <a href="/facts/Magnetosphere/BXzgPoPy">magnetosphere</a> and affects near-Earth space and its <a href="/facts/Atmosphere/oUpLaGRF">atmosphere</a>, including <a href="/facts/Aurora_(astronomy)/6agpj9Qs">aurorae</a>. </p><p>The spacecraft were cylindrical (2.9 x 1.3 m, see <a href="http://clusterlaunch.esa.int/science-e/www/object/index.cfm?fobjectid=31381">online 3D model</a>) and were spinning at 15 rotations per <a href="/facts/Minute/WTRsLrWy">minute</a>. After launch, their <a href="/facts/Solar_cell/3L814UCC">solar cells</a> provided 224 <a href="/facts/Watt/VK8oqRrm">watts</a> power for instruments and communications. Solar array power gradually declined as the mission progressed, due to damage by energetic charged particles, but this was planned for and the power level remains sufficient for science operations. The four spacecraft maneuvered into various tetrahedral formations to study the magnetospheric structure and boundaries. The inter-spacecraft distances could be altered and varied from around 4 to 10,000 km. The <a href="/facts/Propellant/K88ymXRy">propellant</a> for the transfer to the operational orbit, and the maneuvers to vary inter-spacecraft separation distances made up approximately half of the spacecraft's launch weight. </p><p>The highly <a href="/facts/Ellipse/1wUDnGxY">elliptical</a> <a href="/facts/Orbit/nD2TPySG">orbits</a> of the spacecraft initially reached a <a href="/facts/Perigee/VaL6ow9w">perigee</a> of around 4 RE (Earth radii, where 1 RE = 6371 km) and an <a href="/facts/Apogee/MSHAk1RU">apogee</a> of 19.6 RE. Each orbit took approximately 57 <a href="/facts/Hour/rBje78F6">hours</a> to complete. The orbit evolved over time; the line of apsides rotated southwards so that the distance at which the orbit crossed the magnetotail current sheet progressively reduced, and a wide range of dayside magnetopause crossing latitudes were sampled. Gravitational effects imposed a long term cycle of change in the perigee (and apogee) distance, which saw the perigees reduce to a few 100 km in 2011 before beginning to rise again. The orbit plane rotated away from 90 degrees inclination. Orbit modifications by ESOC altered the orbital period to 54 hours. All these changes allowed Cluster to visit a much wider set of important magnetospheric regions than was possible for the initial 2-year mission, improving the scientific breadth of the mission. </p><p>The <a href="/facts/European_Space_Operations_Centre/RQ0ASFvU">European Space Operations Centre</a> (ESOC) acquired <a href="/facts/Telemetry/Mz9czXTl">telemetry</a> and distributed to the online data centers the science data from the spacecraft. The Joint Science Operations Centre (JSOC) at <a href="/facts/Rutherford_Appleton_Laboratory/LuHVhXIE">Rutherford Appleton Laboratory</a> in the UK coordinated scientific planning and in collaboration with the instrument teams provided merged instrument commanding requests to ESOC. </p><p>The <a href="https://csa.esac.esa.int/">Cluster Science Archive</a> is the <a href="/facts/ESA/L8YRNV0C">ESA</a> long term archive of the Cluster and Double Star science missions. Since 1 November 2014, it is the sole public access point to the Cluster mission scientific data and supporting datasets. The Double Star data are publicly available via this archive. The Cluster Science Archive is located alongside all the other <a href="/facts/ESA/L8YRNV0C">ESA</a> science archives at the <a href="/facts/European_Space_Astronomy_Center/YzwB1PK4">European Space Astronomy Center</a>, located near Madrid, Spain. From February 2006 to October 2014, the Cluster data could be accessed via the <a href="http://caa.esac.esa.int/caa/">Cluster Active Archive</a>. </p> <h2 id="history">History</h2> <p>The <a href="/facts/Cluster_(spacecraft)/5gT3oNg9">Cluster</a> mission was proposed to ESA in 1982 and approved in 1986, along with the <a href="/facts/Solar_and_Heliospheric_Observatory/vxkoDFAh">Solar and Heliospheric Observatory</a> (SOHO), and together these two missions constituted the Solar Terrestrial Physics "cornerstone" of ESA's Horizon 2000 missions programme. Though the original Cluster spacecraft were completed in 1995, the explosion of the <a href="/facts/Ariane_5/H78wlLG4">Ariane 5</a> rocket carrying the satellites in 1996 delayed the mission by four years while new instruments and spacecraft were built. </p><p>On July 16, 2000, a Soyuz-Fregat rocket from the <a href="/facts/Baikonur_Cosmodrome/sk16LwcH">Baikonur Cosmodrome</a> launched two of the replacement Cluster II spacecraft, (Salsa and Samba) into a parking orbit from where they maneuvered under their own power into a 19,000 by 119,000 kilometre <a href="/facts/Orbit/nD2TPySG">orbit</a> with a period of 57 hours. Three weeks later on August 9, 2000, another Soyuz-Fregat rocket lifted the remaining two spacecraft (Rumba and Tango) into similar orbits. Spacecraft 1, Rumba, was also known as the <a href="/facts/Phoenix_(mythology)/2upk0hlf">Phoenix</a> spacecraft, since it is largely built from spare parts left over after the failure of the original mission. After commissioning of the payload, the first scientific measurements were made on February 1, 2001. </p><p>The <a href="/facts/European_Space_Agency/L8YRNV0C">European Space Agency</a> ran a competition to name the satellites across all of the <a href="/facts/European_Space_Agency/L8YRNV0C">ESA</a> member states.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> Ray Cotton, from the <a href="/facts/United_Kingdom/kuPAILt2">United Kingdom</a>, won the competition with the names <a href="/facts/Rumba/YxTzv7mR">Rumba</a>, <a href="/facts/Tango/zjY3wATe">Tango</a>, <a href="/facts/Salsa_(dance)/dVGGsW1F">Salsa</a> and <a href="/facts/Samba/Huyc2pnX">Samba</a>.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> Ray's town of residence, <a href="/facts/Bristol/nLwyoDTG">Bristol</a>, was awarded with scale models of the satellites in recognition of the winning entry,<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a><a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> as well as the city's connection with the satellites. However, after many years of being stored away, they were finally given a home at the <a href="/facts/Rutherford_Appleton_Laboratory/LuHVhXIE">Rutherford Appleton Laboratory</a>. </p><p>Originally planned to last until the end of 2003, the mission was extended several times. The first extension took the mission from 2004 until 2005, and the second from 2005 to June 2009. The mission was ultimately extended until September 2024, when the scientific payload operations on the satellites ended.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> The ultimate end of the Cluster project (especially the Cluster II satellites) will happen in 2026 as the last satellite enters the atmosphere and is destroyed.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> </p> <h2 id="scientific-objectives">Scientific objectives</h2> <p>Previous single and two-spacecraft missions were not capable of providing the data required to accurately study the boundaries of the magnetosphere. Because the <a href="/facts/Plasma_(physics)/1d3btMVU">plasma</a> comprising the magnetosphere cannot be viewed using remote sensing techniques, satellites must be used to measure it in-situ. Four spacecraft allowed scientists make the 3D, time-resolved measurements needed to create a realistic picture of the complex plasma interactions occurring between regions of the magnetosphere and between the magnetosphere and the solar wind. </p><p>Each satellite carried a scientific payload of 11 instruments designed to study the small-scale plasma structures in space and time in the key plasma regions: solar wind, <a href="/facts/Bow_shock/kfCocb0I">bow shock</a>, <a href="/facts/Magnetopause/HbXxbHqb">magnetopause</a>, polar cusps, <a href="/facts/Magnetotail/BXzgPoPy">magnetotail</a>, <a href="/facts/Plasmapause/lcujeQtJ">plasmapause</a> boundary layer and over the polar caps and the auroral zones. </p> <ul><li>The <i><a href="/facts/Bow_shock/kfCocb0I">bow shock</a></i> is the region in space between the Earth and the <a href="/facts/Sun/CadPCVHh">Sun</a> where the solar wind decelerates from super- to sub-sonic before being deflected around the Earth. In traversing this region, the spacecraft made measurements which helped characterize processes occurring at the bow shock, such as the origin of hot flow anomalies and the transmission of <a href="/facts/Electromagnetic_radiation/Ynx7ujCW">electromagnetic</a> waves through the bow shock and the <a href="/facts/Magnetosheath/IeR1HWwC">magnetosheath</a> from the solar wind.</li> <li>Behind the bow shock is the thin plasma layer separating the Earth and solar wind magnetic fields known as the <i><a href="/facts/Magnetopause/HbXxbHqb">magnetopause</a></i>. This boundary moves continuously due to the constant variation in solar wind pressure. Since the plasma and magnetic pressures within the solar wind and the magnetosphere, respectively, should be in equilibrium, the magnetosphere should be an impenetrable boundary. However, plasma has been observed crossing the magnetopause into the magnetosphere from the solar wind. Cluster's four-point measurements made it possible to track the motion of the magnetopause as well as elucidate the mechanism for plasma penetration from the solar wind.</li> <li>In two regions, one in the northern hemisphere and the other in the southern, the magnetic field of the Earth is perpendicular rather than tangential to the magnetopause. These <i>polar cusps</i> allow solar wind particles, consisting of ions and electrons, to flow into the magnetosphere. Cluster recorded the particle distributions, which allowed the turbulent regions at the exterior cusps to be characterized.</li> <li>The regions of the Earth's magnetic field that are stretched by the solar wind away from the Sun are known collectively as the <i>magnetotail</i>. Two lobes that reach past the Moon in length form the outer magnetotail while the central <a href="/facts/Plasma_sheet/KJhDHwMA">plasma sheet</a> forms the inner magnetotail, which is highly active. Cluster monitored particles from the <a href="/facts/Ionosphere/mT9tTBE5">ionosphere</a> and the solar wind as they passed through the magnetotail lobes. In the central plasma sheet, Cluster determined the origins of ion beams and disruptions to the magnetic field-aligned currents caused by <a href="/facts/Magnetospheric_convection_and_magnetic_storms/4rD8DSlm">substorms</a>.</li> <li>The precipitation of charged particles in the atmosphere creates a ring of light emission around the magnetic pole known as the <i>auroral zone</i>. Cluster measured the time variations of transient particle flows and electric and magnetic fields in the region.</li></ul> <h2 id="instrumentation-on-each-cluster-satellite">Instrumentation on each Cluster satellite</h2> <table><tbody><tr><th>Number</th><th>Acronym</th><th>Instrument</th><th>Measurement</th><th>Purpose</th></tr><tr><td>1</td><td>ASPOC</td><td>Active Spacecraft Potential Control experiment</td><td>Regulation of spacecraft's electrostatic potential</td><td>Enabled the measurement by PEACE of cold electrons (a few eV temperature), otherwise hidden by spacecraft photoelectrons</td></tr><tr><td>2</td><td>CIS</td><td>Cluster Ion Spectroscopy experiment</td><td>Ion times-of-flight (TOFs) and energies from 0 to 40 keV</td><td>Composition and 3D distribution of ions in plasma</td></tr><tr><td>3</td><td>DWP</td><td>Digital Wave Processing instrument</td><td>Coordinates the operations of the EFW, STAFF, WBD and WHISPER instruments</td><td>At the lowest level, DWP provided electrical signals to synchronise instrument sampling. At the highest level, DWP enabled more complex operational modes by means of macros</td></tr><tr><td>4</td><td>EDI</td><td>Electron Drift Instrument</td><td>Electric field E magnitude and direction</td><td>E vector, gradients in local magnetic field B</td></tr><tr><td>5</td><td>EFW</td><td>Electric Field and Wave experiment</td><td>Electric field E magnitude and direction</td><td>E vector, spacecraft potential, electron density and temperature</td></tr><tr><td>6</td><td>FGM</td><td>Fluxgate Magnetometer</td><td>Magnetic field B magnitude and direction</td><td>B vector and event trigger to all instruments except ASPOC</td></tr><tr><td>7</td><td>PEACE</td><td>Plasma Electron and Current Experiment</td><td>Electron energies from 0.0007 to 30 keV</td><td>3D distribution of electrons in plasma</td></tr><tr><td>8</td><td>RAPID</td><td>Research with Adaptive Particle Imaging Detectors</td><td>Electron energies from 39 to 406 keV, ion energies from 20 to 450 keV</td><td>3D distributions of high-energy electrons and ions in plasma</td></tr><tr><td>9</td><td>STAFF</td><td>Spatio-Temporal Analysis of Field Fluctuation experiment</td><td>Magnetic field B magnitude and direction of EM fluctuations, cross-correlation of E and B</td><td>Properties of small-scale current structures, source of plasma waves and turbulence</td></tr><tr><td>10</td><td>WBD</td><td>Wide Band Data receiver</td><td>High time resolution measurements of both electric and magnetic fields in selected frequency bands from 25 Hz to 577 kHz. It provided a unique new capability to perform <a href="/facts/Very-long-baseline_interferometry/2XDaPPMw">Very-long-baseline interferometry</a> (VLBI) measurements</td><td>Properties of natural plasma waves (e.g. <a href="/facts/Auroral_kilometric_radiation/bvzUSMuN">auroral kilometric radiation</a>) in the Earth magnetosphere and its vicinity including: source location and size and propagation</td></tr><tr><td>11</td><td>WHISPER</td><td>Waves of High Frequency and Sounder for Probing of Density by Relaxation</td><td>Electric field E spectrograms of terrestrial plasma waves and radio emissions in the 2–80 kHz range; triggering of plasma resonances by an active sounder</td><td>Source location of waves by triangulation; electron density within the range 0.2–80 cm−3</td></tr></tbody></table> <h2 id="double-star-mission-with-china">Double Star mission with China</h2> <p>In 2003 and 2004, the <a href="/facts/China_National_Space_Administration/q3s4bGYt">China National Space Administration</a> launched the <a href="/facts/Double_Star_mission/vlyJ1rMT">Double Star</a> satellites, TC-1 and TC-2, that worked together with Cluster to make coordinated measurements mostly within the <a href="/facts/Magnetosphere/BXzgPoPy">magnetosphere</a>. TC-1 stopped operating on 14 October 2007. The last data from TC-2 was received in 2008. TC-2 made a contribution to magnetar science<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a><a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a> as well as to magnetospheric physics. The TC-1 examined density holes near the Earth's <a href="/facts/Bow_shock/kfCocb0I">bow shock</a> that can play a role in bow shock formation<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a><a class="footnote-ref" id="fnref:14" href="#fn:14"><sup>14</sup></a> and looked at neutral sheet oscillations.<a class="footnote-ref" id="fnref:15" href="#fn:15"><sup>15</sup></a> </p> <h2 id="awards">Awards</h2> <p>Cluster team awards: </p> <ul><li>2024 British Interplanetary Society Sir Arthur Clarke Award to the UK Cluster Mission Team</li> <li>2019 Royal Astronomical Society Group Achievement Award<a class="footnote-ref" id="fnref:16" href="#fn:16"><sup>16</sup></a></li> <li>2015 ESA 15th anniversary award</li> <li>2013 ESA team award</li> <li>2010 International Academy of Astronautics Laurels for team achievements for Cluster and Double Star teams<a class="footnote-ref" id="fnref:17" href="#fn:17"><sup>17</sup></a></li> <li>2005 ESA Cluster 5th anniversary award</li> <li>2004 NASA group achievement award</li> <li>2000 Popular science best of what's new award</li> <li>2000 ESA Cluster launch award</li></ul> <p>Individual awards: </p> <ul><li>2023 Hermann Opgenoorth (Univ. of Umea, Sweden), former Cluster Ground Based Working Group lead, was awarded the 2023 EGU Julius Bartels Medal<a class="footnote-ref" id="fnref:18" href="#fn:18"><sup>18</sup></a></li> <li>2020 Daniel Graham (Swedish Institute of Space Physics, Uppsala, Sweden) was awarded the COSPAR Zeldovich medal<a class="footnote-ref" id="fnref:19" href="#fn:19"><sup>19</sup></a></li> <li>2019 <a href="/facts/Margaret_Kivelson/1QCbh6us">Margaret Kivelson</a> (UCLA, USA), Cluster FGM CoI, received RAS gold medal<a class="footnote-ref" id="fnref:20" href="#fn:20"><sup>20</sup></a></li> <li>2018 Hermann Opgenoorth (Univ. of Umea, Sweden), former Cluster Ground Based Working Group lead, was awarded the 2018 Baron Marcel Nicolet Space Weather and Space Climate medal<a class="footnote-ref" id="fnref:21" href="#fn:21"><sup>21</sup></a></li> <li>2016 Stephen Fuselier (SWRI, USA), Cluster CIS CoI, received EGU Hannes Alfvén Meda<a class="footnote-ref" id="fnref:22" href="#fn:22"><sup>22</sup></a></li> <li>2016 Mike Hapgood, Cluster mission scientific operations expert was awarded the Baron Marcel Nicolet Medal for Space Weather and Space Climate<a class="footnote-ref" id="fnref:23" href="#fn:23"><sup>23</sup></a></li> <li>2014 <a href="/facts/Rumi_Nakamura/7dQJQWWb">Rumi Nakamura</a> (IWF, Austria), Cluster CIS/EDI/FGM CoI, received EGU Julius Bartels Medal<a class="footnote-ref" id="fnref:24" href="#fn:24"><sup>24</sup></a></li> <li>2013 Mike Hapgood (RAL, UK), Cluster JSOC project scientist received RAS service award<a class="footnote-ref" id="fnref:25" href="#fn:25"><sup>25</sup></a></li> <li>2013 Göran Marklund, EFW Co-I, received the EGU Hannes Alfvén Medal 2013.<a class="footnote-ref" id="fnref:26" href="#fn:26"><sup>26</sup></a></li> <li>2013 Steve Milan, Cluster Ground based representative of the Cluster mission received UK Royal Astronomical Society (RAS) Chapman medal<a class="footnote-ref" id="fnref:27" href="#fn:27"><sup>27</sup></a></li> <li>2012 Andrew Fazakerley, Cluster and Double Star PI (PEACE), received the Royal Astronomical Society Chapman Medal<a class="footnote-ref" id="fnref:28" href="#fn:28"><sup>28</sup></a></li> <li>2012 Zuyin Pu (Pekin U., China), RAPID/CIS/FGM CoI, received AGU International Award<a class="footnote-ref" id="fnref:29" href="#fn:29"><sup>29</sup></a></li> <li>2012 Jolene Pickett (Iowa U., USA), a Cluster WBD PI, received the State of Iowa Board of Regents Staff Excellence<a class="footnote-ref" id="fnref:30" href="#fn:30"><sup>30</sup></a></li> <li>2012 Jonathan Eastwood (Imperial College, UK), FGM Co-I, received COSPAR Yakov B. Zeldovich medal<a class="footnote-ref" id="fnref:31" href="#fn:31"><sup>31</sup></a></li> <li>2008 Andre Balogh (Imperial College, UK), Cluster FGM PI, received RAS Chapman medal<a class="footnote-ref" id="fnref:32" href="#fn:32"><sup>32</sup></a></li> <li>2006 Steve Schwartz (QMW, UK), Cluster UK data system scientist and PEACE co-I, received RAS Chapman medal<a class="footnote-ref" id="fnref:33" href="#fn:33"><sup>33</sup></a></li></ul> <h2 id="discoveries-and-mission-milestones">Discoveries and mission milestones</h2> <h3>2024</h3> <ul><li>September 8 - Re-entry of <i>SALSA</i> (Cluster 2) satellite, the first of the Cluster II satellites to re-enter the atmosphere<a class="footnote-ref" id="fnref:34" href="#fn:34"><sup>34</sup></a></li></ul> <h3>2023</h3> <ul><li>April 28 - Magnetic reconnection at high and low latitudes during the passage of an ICME<a class="footnote-ref" id="fnref:35" href="#fn:35"><sup>35</sup></a></li> <li>March 24 - Properties of the Martian Magnetotail compared Cluster data in the Earth magnetotail<a class="footnote-ref" id="fnref:36" href="#fn:36"><sup>36</sup></a></li> <li>March 23 - Scaling laws for the energy transfer in space plasma turbulence<a class="footnote-ref" id="fnref:37" href="#fn:37"><sup>37</sup></a></li> <li>March 01 - Turbulent MHD cascade in the Jovian magnetosheath compared to Cluster measurements<a class="footnote-ref" id="fnref:38" href="#fn:38"><sup>38</sup></a></li> <li>January 26 - Evidence for lunar tide effects in Earth’s plasmasphere<a class="footnote-ref" id="fnref:39" href="#fn:39"><sup>39</sup></a></li> <li>January 20 - Ion Outflow in Middle Altitude LLBL/Cusp from Different Origins<a class="footnote-ref" id="fnref:40" href="#fn:40"><sup>40</sup></a></li></ul> <h3>2022</h3> <ul><li>December 05 - Magnetosphere distortions during the “satellite killer” storm of February 3–4, 2022<a class="footnote-ref" id="fnref:41" href="#fn:41"><sup>41</sup></a></li> <li>October 14 - New insights on the formation of transpolar auroral arc<a class="footnote-ref" id="fnref:42" href="#fn:42"><sup>42</sup></a></li> <li>September 20 - A highway for atmospheric ion escape from Earth during the impact of an interplanetary coronal mass ejection<a class="footnote-ref" id="fnref:43" href="#fn:43"><sup>43</sup></a></li> <li>August 03 - Joint Cluster/ground-based studies in the first 20 years of the Cluster mission<a class="footnote-ref" id="fnref:44" href="#fn:44"><sup>44</sup></a></li> <li>July 18 – In situ observation of a magnetopause indentation that is correspondent to throat aurora and is caused by magnetopause reconnection<a class="footnote-ref" id="fnref:45" href="#fn:45"><sup>45</sup></a></li> <li>June 16 - Kelvin-Helmholtz vortices as an interplay of Magnetosphere-Ionosphere coupling<a class="footnote-ref" id="fnref:46" href="#fn:46"><sup>46</sup></a></li> <li>June 02 - ESA highlight: Magnetic vortices explain mysterious auroral beads<a class="footnote-ref" id="fnref:47" href="#fn:47"><sup>47</sup></a><a class="footnote-ref" id="fnref:48" href="#fn:48"><sup>48</sup></a></li> <li>May 16 - The influence of localized dynamics on dusk-dawn convection in the Earth’s magnetotail<a class="footnote-ref" id="fnref:49" href="#fn:49"><sup>49</sup></a></li> <li>April 1 - Dawn-dusk ion flow asymmetry in the plasma sheet<a class="footnote-ref" id="fnref:50" href="#fn:50"><sup>50</sup></a></li> <li>February 1 - South Pole Station ground-based and Cluster satellite measurements of leaked and escaping Auroral Kilometric Radiation<a class="footnote-ref" id="fnref:51" href="#fn:51"><sup>51</sup></a></li> <li>January 1 - Massive multi-mission statistical study and analytical modeling of the Earth's magnetopause<a class="footnote-ref" id="fnref:52" href="#fn:52"><sup>52</sup></a></li></ul> <h3>2021</h3> <ul><li>December 15 - ESA highlight: Swarm and Cluster get to the bottom of geomagnetic storms<a class="footnote-ref" id="fnref:53" href="#fn:53"><sup>53</sup></a><a class="footnote-ref" id="fnref:54" href="#fn:54"><sup>54</sup></a></li> <li>November 7 - Unique MMS and Cluster observations about magnetic reconnection extent at the magnetopause<a class="footnote-ref" id="fnref:55" href="#fn:55"><sup>55</sup></a></li> <li>November 2 - Spatial distribution of energetic protons in the magnetosphere based on 17 years of data<a class="footnote-ref" id="fnref:56" href="#fn:56"><sup>56</sup></a></li> <li>October 11 - Unique MMS and Cluster observation of disturbances in the near-Earth magnetotail before a magnetic substorm<a class="footnote-ref" id="fnref:57" href="#fn:57"><sup>57</sup></a></li> <li>September 7 - AGU EOS spotlight: Understanding Aurora Formation with ESA’s Cluster Mission<a class="footnote-ref" id="fnref:58" href="#fn:58"><sup>58</sup></a></li> <li>May 2 - Cluster and MMS uncover anisotropic spatial correlation functions at kinetic range in the magnetosheath turbulence<a class="footnote-ref" id="fnref:59" href="#fn:59"><sup>59</sup></a></li> <li>April 9 - The Solar-cycle Variations of the Anisotropy of Taylor Scale and Correlation Scale in the Solar Wind Turbulence<a class="footnote-ref" id="fnref:60" href="#fn:60"><sup>60</sup></a></li> <li>February 18 - Heavy Metal and Rock in Space: Cluster RAPID Observations of Fe and Si<a class="footnote-ref" id="fnref:61" href="#fn:61"><sup>61</sup></a></li></ul> <h3>2020</h3> <ul><li>December 1 - Cluster, Helios and Ulysses reveal characteristics of solar wind supra thermal halo electrons<a class="footnote-ref" id="fnref:62" href="#fn:62"><sup>62</sup></a></li> <li>November 1 - Cluster, Swam and CHAMP join forces to explain hemispheric asymmetries in the Earth magnetotail<a class="footnote-ref" id="fnref:63" href="#fn:63"><sup>63</sup></a></li></ul> <ul><li>October 21 - Space plasma regimes classified with Cluster data<a class="footnote-ref" id="fnref:64" href="#fn:64"><sup>64</sup></a></li> <li>October 1 - Effects of Solar Activity on Taylor Scale and Correlation Scale in Solar Wind Magnetic Fluctuations<a class="footnote-ref" id="fnref:65" href="#fn:65"><sup>65</sup></a></li> <li>September 1 - Van Allen Probes and Cluster join forces to study Outer Radiation Belt Electrons<a class="footnote-ref" id="fnref:66" href="#fn:66"><sup>66</sup></a></li></ul> <ul><li>August 9 - Cluster’s 20 years of studying Earth’s magnetosphere], celebrating 20 years after the launch of the second pair of Cluster spacecraft<a class="footnote-ref" id="fnref:67" href="#fn:67"><sup>67</sup></a></li> <li>July 31 - ESA science highlight: Auroral substorms triggered by short circuiting of plasma flows<a class="footnote-ref" id="fnref:68" href="#fn:68"><sup>68</sup></a><a class="footnote-ref" id="fnref:69" href="#fn:69"><sup>69</sup></a></li> <li>July 16 - BBC skyatnight podcast with Dr. Mike Hapgood on 20 years of ESA’s Cluster mission,<a class="footnote-ref" id="fnref:70" href="#fn:70"><sup>70</sup></a> celebrating 20 years after the launch of the first pair of Cluster satellites</li> <li>April 20 - What drives some of the largest and most dynamic auroral forms?<a class="footnote-ref" id="fnref:71" href="#fn:71"><sup>71</sup></a></li> <li>March 19 - ESA science highlight: Iron is everywhere in Earth's vicinity, suggest two decades of Cluster data<a class="footnote-ref" id="fnref:72" href="#fn:72"><sup>72</sup></a><a class="footnote-ref" id="fnref:73" href="#fn:73"><sup>73</sup></a></li> <li>February 27 - What makes Kelvin Helmholtz vortices grow at the Earth's magnetopause?<a class="footnote-ref" id="fnref:74" href="#fn:74"><sup>74</sup></a></li></ul> <h3>2019</h3> <ul><li>December 23 - Magnetized dust clouds penetrate the terrestrial bow shock<a class="footnote-ref" id="fnref:75" href="#fn:75"><sup>75</sup></a></li> <li>November 18 - Earth’s magnetic song recorded for the first time during a solar storm<a class="footnote-ref" id="fnref:76" href="#fn:76"><sup>76</sup></a><a class="footnote-ref" id="fnref:77" href="#fn:77"><sup>77</sup></a></li> <li>October 10 - What is the source of the energetic oxygen ions found in the high-altitude cusp region?<a class="footnote-ref" id="fnref:78" href="#fn:78"><sup>78</sup></a></li> <li>August 27 - Cluster and XMM pave the way for SMILE<a class="footnote-ref" id="fnref:79" href="#fn:79"><sup>79</sup></a><a class="footnote-ref" id="fnref:80" href="#fn:80"><sup>80</sup></a></li> <li>August 20 - Asymmetric transport of the Earth's polar outflows by the interplanetary magnetic field<a class="footnote-ref" id="fnref:81" href="#fn:81"><sup>81</sup></a></li> <li>August 5 - Energetic electron acceleration found by Cluster in unconfined reconnection jets for the first time<a class="footnote-ref" id="fnref:82" href="#fn:82"><sup>82</sup></a></li> <li>May 1 - Kelvin‐Helmholtz waves magnetic curvature and vorticity: Four‐spacecraft Cluster observations<a class="footnote-ref" id="fnref:83" href="#fn:83"><sup>83</sup></a></li> <li>March 4 - <a href="http://sci.esa.int/cluster/61172-cluster-helps-solve-mysteries-of-geomagnetic-storms/">ESA science highlight: Cluster helps solve mysteries of geomagnetic storms</a><a class="footnote-ref" id="fnref:84" href="#fn:84"><sup>84</sup></a></li> <li>February 27 - <a href="http://sci.esa.int/cluster/61162-cluster-reveals-inner-workings-of-earth-s-cosmic-particle-accelerator/">ESA science highlight: Cluster reveals inner workings of Earth's cosmic particle accelerator</a><a class="footnote-ref" id="fnref:85" href="#fn:85"><sup>85</sup></a></li> <li>February 13 - <a href="https://doi.org/10.1029/2018JA026272">Statistical survey of the terrestrial bow shock observed by the Cluster spacecraft</a><a class="footnote-ref" id="fnref:86" href="#fn:86"><sup>86</sup></a></li> <li>January 14 - <a href="https://iopscience.iop.org/article/10.3847/2041-8213/aafa75">Super-efficient electron acceleration by an isolated magnetic reconnection</a><a class="footnote-ref" id="fnref:87" href="#fn:87"><sup>87</sup></a></li></ul> <h3>2018</h3> <ul><li>November 28 – <a href="https://doi.org/10.1029/2018GL079816#">Complete picture of the O+ circulation (and escape) in the outer magnetosphere and its dependence on geomagnetic activity</a><a class="footnote-ref" id="fnref:88" href="#fn:88"><sup>88</sup></a></li></ul> <ul><li>November 8 - <a href="http://sci.esa.int/cluster/60912-windy-with-a-chance-of-magnetic-storms-space-weather-science-with-cluster/">ESA science highlight: Windy with a chance of magnetic storms – space weather science with Cluster</a></li> <li>September 30 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018SW001881/">O+ escape during the extreme space weather event of 4–10 September 2017</a><a class="footnote-ref" id="fnref:89" href="#fn:89"><sup>89</sup></a></li> <li>August 8 - <a href="https://www.ann-geophys.net/36/1073/2018/angeo-36-1073-2018.pdf#">Statistical survey of day-side magnetospheric current flow using Cluster observations: bow shock</a><a class="footnote-ref" id="fnref:90" href="#fn:90"><sup>90</sup></a></li> <li>June 20 – <a href="http://iopscience.iop.org/article/10.3847/1538-4357/aac496/pdf#">Detection of magnetic nulls around reconnection fronts (open access)</a><a class="footnote-ref" id="fnref:91" href="#fn:91"><sup>91</sup></a></li> <li>May 21 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2017JA025147#">Tailward propagation of magnetic energy density variations with respect to substorm onset times (open access)</a><a class="footnote-ref" id="fnref:92" href="#fn:92"><sup>92</sup></a></li> <li>April 24 – <a href="https://link.springer.com/content/pdf/10.1007%2Fs11214-018-0505-6.pdf#">Kelvin–Helmholtz Instability: lessons learned and ways forward</a><a class="footnote-ref" id="fnref:93" href="#fn:93"><sup>93</sup></a></li> <li>March 29 – <a href="https://www.ann-geophys.net/36/527/2018/angeo-36-527-2018.pdf#">Three-dimensional density and compressible magnetic structure in solar wind turbulence</a><a class="footnote-ref" id="fnref:94" href="#fn:94"><sup>94</sup></a></li> <li>February 8 – <a href="http://sci.esa.int/cluster/59954-understanding-earth-what-the-cluster-mission-has-taught-us-so-far/#">ESA spotlight on... Understanding Earth: what the Cluster mission has taught us so far</a></li> <li>January 29 – <a href="http://sci.esa.int/cluster/59947-cluster-measures-turbulence-in-earth-s-magnetic-environment/#">ESA research highlight: Cluster measures turbulence in Earth's magnetic environment</a><a class="footnote-ref" id="fnref:95" href="#fn:95"><sup>95</sup></a></li> <li>January 22 – <a href="https://doi.org/10.1002/2017GL076303#">Science nugget of the 2013-2014 Cluster Inner Magnetosphere campaign</a><a class="footnote-ref" id="fnref:96" href="#fn:96"><sup>96</sup></a></li></ul> <h3>2017</h3> <ul><li>December 11, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017SW001684#">Empirical modeling of the quiet and storm time geosynchronous magnetic field</a><a class="footnote-ref" id="fnref:97" href="#fn:97"><sup>97</sup></a></li></ul> <ul><li>December 6, 2017 – <a href="http://iopscience.iop.org/article/10.3847/2041-8213/aa9bf3#">Direct measurement of anisotropic and asymmetric wave vector spectrum in ion-scale solar wind turbulence</a><a class="footnote-ref" id="fnref:98" href="#fn:98"><sup>98</sup></a></li></ul> <ul><li>October 30, 2017 – <a href="http://iopscience.iop.org/article/10.3847/1538-4357/aa9022#">Coherent structures at ion scales in the fast solar wind: Cluster observations</a><a class="footnote-ref" id="fnref:99" href="#fn:99"><sup>99</sup></a></li></ul> <ul><li>September 18, 2017 – <a href="https://earth-planets-space.springeropen.com/track/pdf/10.1186/s40623-017-0707-2#">An intense magnetic substorm scrutinized by a fleet of satellites including Cluster and MMS (open access)</a><a class="footnote-ref" id="fnref:100" href="#fn:100"><sup>100</sup></a></li></ul> <ul><li>August 28, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2016JA023739#">Relationship between electron field‐aligned anisotropy and dawn‐dusk magnetic field: nine years of Cluster observations in the Earth magnetotail</a><a class="footnote-ref" id="fnref:101" href="#fn:101"><sup>101</sup></a></li></ul> <ul><li>August 1, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017JA024502#">Collisionless shock velocity estimation at Venus and Earth (open access)</a><a class="footnote-ref" id="fnref:102" href="#fn:102"><sup>102</sup></a></li></ul> <ul><li>June 16, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2017GL073249#">Cover of GRL: Global ULF waves generated by a hot flow anomaly</a><a class="footnote-ref" id="fnref:103" href="#fn:103"><sup>103</sup></a></li> <li>April 10, 2017 - <a href="http://sci.esa.int/cluster/58994-o-marks-the-spot-for-magnetic-reconnection/#">ESA research highlight: O marks the spot for magnetic reconnection</a><a class="footnote-ref" id="fnref:104" href="#fn:104"><sup>104</sup></a></li> <li>April 7, 2017 – <a href="https://eos.org/research-spotlights/explaining-unexpected-twists-in-the-suns-magnetic-field#">EOS research spotlight: Explaining unexpected twists in the Sun's Magnetic Field</a><a class="footnote-ref" id="fnref:105" href="#fn:105"><sup>105</sup></a></li></ul> <ul><li>March 23, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA023524#">Occurrence frequency and location of magnetic islands at the dayside magnetopause</a><a class="footnote-ref" id="fnref:106" href="#fn:106"><sup>106</sup></a></li></ul> <ul><li>February 18, 2017 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JA023586#">Magnetic reconnection and their associated auroral enhancements (open access)</a><a class="footnote-ref" id="fnref:107" href="#fn:107"><sup>107</sup></a></li></ul> <h3>2016</h3> <ul><li>October 3, 2016 – <a href="http://www.nature.com/articles/ncomms13001#">What happens to the Earth's magnetosphere when its bow shock disappears?</a><a class="footnote-ref" id="fnref:108" href="#fn:108"><sup>108</sup></a></li></ul> <ul><li>September 6, 2016 – <a href="http://news.erau.edu/headlines/embry-riddle-research-on-space-plasma-hurricanes-could-lead-to-new-sources-of-energy/">Embry-Riddle University (FL, USA) science highlight: Space plasma hurricanes could lead to new sources of energy</a><a class="footnote-ref" id="fnref:109" href="#fn:109"><sup>109</sup></a></li></ul> <ul><li>July 20, 2016 – <a href="http://onlinelibrary.wiley.com/wol1/doi/10.1002/2016GL069520/full#">Cluster and MMS join forces to understand the origin of northern lights</a><a class="footnote-ref" id="fnref:110" href="#fn:110"><sup>110</sup></a></li></ul> <ul><li>July 8 – <a href="http://iopscience.iop.org/article/10.3847/2041-8205/825/2/L27#">Transport of solar wind H+ and He++ ions across Earth's bow shock</a><a class="footnote-ref" id="fnref:111" href="#fn:111"><sup>111</sup></a></li></ul> <ul><li>July 7 – <a href="http://sci.esa.int/cluster/58028-the-curious-case-of-earth-s-leaking-atmosphere/#">ESA science highlight: the curious case of Earth's leaking atmosphere</a><a class="footnote-ref" id="fnref:112" href="#fn:112"><sup>112</sup></a><a class="footnote-ref" id="fnref:113" href="#fn:113"><sup>113</sup></a></li></ul> <ul><li>June 11 – <a href="http://onlinelibrary.wiley.com/doi/10.1002/2015JA022238/full#">Substructures within a dipolarization front revealed by high-temporal resolution Cluster observations</a><a class="footnote-ref" id="fnref:114" href="#fn:114"><sup>114</sup></a></li></ul> <ul><li>May 11 – <a href="https://doi.org/10.1002/2016GL068818#">Cone angle control of the interaction of magnetic clouds with the Earth's bow shock</a><a class="footnote-ref" id="fnref:115" href="#fn:115"><sup>115</sup></a></li></ul> <ul><li>March 21 – <a href="https://doi.org/10.1002/2015JA022071#">The particle carriers of field‐aligned currents in the Earth's magnetotail during a substorm</a><a class="footnote-ref" id="fnref:116" href="#fn:116"><sup>116</sup></a></li></ul> <ul><li>February 29 – <a href="https://doi.org/10.1002/2015JA021667#">The role of ionospheric O+ outflow in the generation of earthward propagating plasmoids</a><a class="footnote-ref" id="fnref:117" href="#fn:117"><sup>117</sup></a></li> <li>January 11 – <a href="https://doi.org/10.1002/2015JA021540#">A statistical study of plasmaspheric plumes and ionospheric outflows observed at the dayside magnetopause</a><a class="footnote-ref" id="fnref:118" href="#fn:118"><sup>118</sup></a></li></ul> <h3>2015</h3> <ul><li>December 7 - <a href="http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys3578.html#">Coalescence of magnetic flux ropes in the ion diffusion region of magnetic reconnection</a><a class="footnote-ref" id="fnref:119" href="#fn:119"><sup>119</sup></a></li> <li>October 22 - <a href="https://www.ann-geophys.net/33/1285/2015/angeo-33-1285-2015.pdf#">Wide-banded Non-Thermal Continuum (NTC) radiation: local to remote observations by the four Cluster satellites</a><a class="footnote-ref" id="fnref:120" href="#fn:120"><sup>120</sup></a></li> <li>September 3 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2015GL064959#">Statistics and accuracy of magnetic null identification in multispacecraft data (open access)</a><a class="footnote-ref" id="fnref:121" href="#fn:121"><sup>121</sup></a></li> <li>August 22 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2015JA021230#">Cusp dynamics under northward IMF using three‐dimensional global particle‐in‐cell simulations (open access)</a><a class="footnote-ref" id="fnref:122" href="#fn:122"><sup>122</sup></a></li> <li>July 14 - <a href="http://sci.esa.int/cluster/56143-cluster-solves-the-mystery-of-equatorial-noise/#">Cluster solves the mystery of equatorial noise</a><a class="footnote-ref" id="fnref:123" href="#fn:123"><sup>123</sup></a></li> <li>July 1 - <a href="http://sci.esa.int/cluster/56098-seven-esa-satellites-team-up-to-explore-earths-magnetic-field//#">Seven ESA satellites team up to explore the Earth's magnetic field</a><a class="footnote-ref" id="fnref:124" href="#fn:124"><sup>124</sup></a></li> <li>April 9 - <a href="http://sci.esa.int/cluster/55764-heart-of-the-black-auroras-revealed-by-cluster/#">Heart of the black auroras revealed by Cluster</a><a class="footnote-ref" id="fnref:125" href="#fn:125"><sup>125</sup></a></li> <li>March 25 - <a href="http://www.esa.int/Our_Activities/Operations/Cluster_satellite_catches_up/#">Cluster satellite catches up</a></li> <li>February 19 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014JA020937#">Magnetospheric signatures of ionospheric density cavities observed by Cluster (open access)</a><a class="footnote-ref" id="fnref:126" href="#fn:126"><sup>126</sup></a></li> <li>February 16 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL062972#">Solar illumination control of ionospheric outflow above polar cap arcs (open access)</a><a class="footnote-ref" id="fnref:127" href="#fn:127"><sup>127</sup></a></li> <li>January 16 – <a href="http://www.esa.int/Our_Activities/Operations/Rejigging_the_Cluster_quartet/#">Rejigging the Cluster quartet at the bow shock and in the solar wind</a></li></ul> <h3>2014</h3> <ul><li>December 18 – <a href="http://www.esa.int/Our_Activities/Space_Science/Cluster/Origin_of_high-latitude_auroras_revealed/#">Origin of high-latitude auroras revealed</a><a class="footnote-ref" id="fnref:128" href="#fn:128"><sup>128</sup></a></li> <li>November 20 - <a href="http://sci.esa.int/director-desk/54999-working-life-extensions-for-esas-science-missions/#">The Cluster mission is extended by ESA up to 2018</a></li> <li>September 4 - <a href="https://doi.org/10.1088/2041-8205/793/1/L11#">Full particle electromagnetic simulations of entropy generation across a collisionless shock</a><a class="footnote-ref" id="fnref:129" href="#fn:129"><sup>129</sup></a></li> <li>August 28 – <a href="http://sci.esa.int/cluster/54573-a-mixed-up-magnetic-storm/#">A mixed-up magnetic storm</a><a class="footnote-ref" id="fnref:130" href="#fn:130"><sup>130</sup></a></li> <li>July 1 - <a href="https://www.ann-geophys.net/32/705/2014/angeo-32-705-2014.pdf#">Dawn–dusk asymmetries in the coupled solar wind–magnetosphere–ionosphere system: a review</a><a class="footnote-ref" id="fnref:131" href="#fn:131"><sup>131</sup></a></li> <li>June 15 - <a href="https://web.archive.org/web/20160305205414/http://www.spacenewsfeed.com/index.php?option=com_content&view=article&id=1238%3Asolar-wind-breaks-through-the-earth-s-magnetic-field&catid=9%3Anews&Itemid=114%2F">Solar wind breaks through the Earth's magnetic field</a><a class="footnote-ref" id="fnref:132" href="#fn:132"><sup>132</sup></a></li></ul> <ul><li>May 28 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2014GL060252#">Evidence of strong energetic ion acceleration in the near‐Earth magnetotail (free access)</a><a class="footnote-ref" id="fnref:133" href="#fn:133"><sup>133</sup></a></li></ul> <ul><li>May 7 - <a href="http://sci.esa.int/cluster/54022-cluster-helps-to-model-earths-mysterious-magnetosphere/#">Cluster helps to model Earth's mysterious magnetosphere</a><a class="footnote-ref" id="fnref:134" href="#fn:134"><sup>134</sup></a></li></ul> <ul><li>March 15 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2013JA019460#">Direct calculation of the ring current distribution and magnetic structure seen by Cluster during geomagnetic storms (open access)</a><a class="footnote-ref" id="fnref:135" href="#fn:135"><sup>135</sup></a></li></ul> <ul><li>January 13 - <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013GL058982#">Low-altitude electron acceleration due to multiple flow bursts in the magnetotail (open access)</a><a class="footnote-ref" id="fnref:136" href="#fn:136"><sup>136</sup></a></li></ul> <h3>2013</h3> <ul><li>November 26 - <a href="http://sci.esa.int/cluster/53256-cluster-takes-a-tilt-at-radio-wave-sources/#">Cluster takes a tilt at radio wave sources</a><a class="footnote-ref" id="fnref:137" href="#fn:137"><sup>137</sup></a></li> <li>November 15 – <a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JA019345#">On the relation between asymmetries in the ring current and magnetopause current (free access)</a><a class="footnote-ref" id="fnref:138" href="#fn:138"><sup>138</sup></a></li></ul> <ul><li>September 20 - <a href="http://www.esa.int/Our_Activities/Operations/ESA_s_Cluster_satellites_in_closest-ever_dance_in_space/#">ESA's Cluster satellites in closest-ever 'dance in space'</a></li> <li>September 10 – <a href="http://sci.esa.int/cluster/52802-cluster-shows-plasmasphere-interacting-with-van-allen-belts/#">Cluster shows plasmasphere interacting with Van Allen belts</a><a class="footnote-ref" id="fnref:139" href="#fn:139"><sup>139</sup></a></li> <li>July 18 - <a href="http://sci.esa.int/cluster/52077-wobbly-magnetic-reconnection-speeds-up-electrons/#">Wobbly magnetic reconnection speeds up electrons</a><a class="footnote-ref" id="fnref:140" href="#fn:140"><sup>140</sup></a></li> <li>July 2 - <a href="http://sci.esa.int/cluster/51988-cluster-discovers-steady-leak-in-earth-plasmasphere/#">Cluster discovers steady leak in the Earth's plasmasphere</a><a class="footnote-ref" id="fnref:141" href="#fn:141"><sup>141</sup></a></li> <li>May 2 - <a href="http://sci.esa.int/cluster/51741-cluster-hears-the-heartbeat-of-magnetic-reconnection/#">Cluster hears the heartbeat of magnetic reconnection</a><a class="footnote-ref" id="fnref:142" href="#fn:142"><sup>142</sup></a></li> <li>April 15 - <a href="http://www.esa.int/Our_Activities/Space_Science/From_solar_activity_to_stunning_aurora#">From solar activity to stunning aurora (ESA Space Science's image of the week)</a></li> <li>April 10 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=51651#">Cluster finds source of aurora energy boost</a><a class="footnote-ref" id="fnref:143" href="#fn:143"><sup>143</sup></a></li></ul> <h3>2012</h3> <ul><li>December 18 – <a href="http://www.esa.int/Our_Activities/Space_Science/The_solar_wind_is_swirly#">The solar wind is swirly</a><a class="footnote-ref" id="fnref:144" href="#fn:144"><sup>144</sup></a></li> <li>October 24 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=50977#">Cluster observes a 'porous' magnetopause</a><a class="footnote-ref" id="fnref:145" href="#fn:145"><sup>145</sup></a></li></ul> <ul><li>August 1 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=50633#">Cluster looks into waves in the magnetosphere's thin boundaries</a><a class="footnote-ref" id="fnref:146" href="#fn:146"><sup>146</sup></a></li> <li>July 2 - <a href="https://www.nasa.gov/mission_pages/sunearth/news/mag-portals.html#">Hidden Portals in Earth's Magnetic Field (NASA science cast video)</a></li> <li>June 6 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=50424#">Origin of particle acceleration in cusps of Earth's magnetosphere uncovered</a><a class="footnote-ref" id="fnref:147" href="#fn:147"><sup>147</sup></a></li> <li>March 7 - <a href="http://www.esa.int/esaCP/SEMXWW7YBZG_index_0.html#">Earth’s magnetic field provides vital protection</a><a class="footnote-ref" id="fnref:148" href="#fn:148"><sup>148</sup></a></li> <li>February 27 - <a href="http://www.space.com/14679-northern-lights-mystery-earth-magnetosphere.html#">Northern lights mystery may be solved (Space.com)</a><a class="footnote-ref" id="fnref:149" href="#fn:149"><sup>149</sup></a></li> <li>February 23 - <a href="http://www.sciencenewsforkids.org/2012/02/surprise-ions#">Surprise Ions (Science News for kids)</a> <a href="https://web.archive.org/web/20120710201550/http://www.sciencenewsforkids.org/2012/02/surprise-ions/">Archived</a> 2012-07-10 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li> <li>January 26 - <a href="https://web.archive.org/web/20120126234347/http://news.nationalgeographic.com/news/2012/01/120126-solar-storm-cold-plasma-earth-space-science/">Giant veil of cold plasma discovered high above Earth (National Geographic)</a></li> <li>January 24 – <a href="http://www.agu.org/news/press/pr_archives/2012/2012-02.shtml#">Elusive matter found to be abundant far above Earth (AGU press release)</a> <a href="https://web.archive.org/web/20121024053457/http://www.agu.org/news/press/pr_archives/2012/2012-02.shtml">Archived</a> 2012-10-24 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a><a class="footnote-ref" id="fnref:150" href="#fn:150"><sup>150</sup></a></li></ul> <h3>2011</h3> <ul><li>November 16 – <a href="http://sci.esa.int/cluster/49637-cluster-reveals-earth-s-bow-shock-is-remarkably-thin#">Cluster reveals Earth's bow shock is remarkably thin</a><a class="footnote-ref" id="fnref:151" href="#fn:151"><sup>151</sup></a></li> <li>September 6 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=49107#">Ultra fast substorm auroras explained</a><a class="footnote-ref" id="fnref:152" href="#fn:152"><sup>152</sup></a></li> <li>August 31 - <a href="http://www.spacedaily.com/reports/40_year_old_Mariner_5_solar_wind_problem_finds_answer_999.html#">40 year old Mariner 5 solar wind problem finds answer</a><a class="footnote-ref" id="fnref:153" href="#fn:153"><sup>153</sup></a></li> <li>July 5–10 - <a href="http://royalsociety.org/summer-science/2011/#">Aurora explorer: the Cluster mission exhibit at the Royal Society summer science exhibition 2011</a></li> <li>July 4 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=48847#">Cluster observes jet braking and plasma heating</a><a class="footnote-ref" id="fnref:154" href="#fn:154"><sup>154</sup></a></li> <li>June 30 - <a href="http://www.esa.int/esaCP/SEMTI34TBPG_index_0.html#">'Dirty hack' restores Cluster mission from near loss</a></li> <li>March 21 - <a href="http://www.space.com/11187-earth-magnetic-field-solar-wind.html#">How vital is a planet's magnetic field? New debate rises</a></li> <li>February 5 – <a href="http://www.esa.int/esaCP/SEMLA6Y1LJG_index_0.html#">Cluster encounters a natural particle accelerator</a><a class="footnote-ref" id="fnref:155" href="#fn:155"><sup>155</sup></a></li> <li>January 7 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=48190#">ESA spacecraft model magnetic boundaries</a><a class="footnote-ref" id="fnref:156" href="#fn:156"><sup>156</sup></a></li></ul> <h3>2010</h3> <ul><li>November 22 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=48007#">ESA extends the Cluster mission until December 2014</a></li> <li>October 4 – <a href="https://www.nasa.gov/topics/solarsystem/sunearthsystem/main/cluster-turbulence.html#">Cluster helps disentangle turbulence in the solar wind</a> <a href="https://web.archive.org/web/20211225221201/http://www.nasa.gov/topics/solarsystem/sunearthsystem/main/cluster-turbulence.html">Archived</a> 2021-12-25 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a><a class="footnote-ref" id="fnref:157" href="#fn:157"><sup>157</sup></a></li> <li>September 1 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=47669#">10 years of success for Cluster quartet</a><a class="footnote-ref" id="fnref:158" href="#fn:158"><sup>158</sup></a></li> <li>July 26 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=47543#">Cluster makes crucial step in understanding space weather</a><a class="footnote-ref" id="fnref:159" href="#fn:159"><sup>159</sup></a><a class="footnote-ref" id="fnref:160" href="#fn:160"><sup>160</sup></a></li> <li>July 16 - <a href="http://www.esa.int/esaCP/SEMHR50PFBG_index_0.html#">Cluster's decade of discovery</a></li> <li>July 8 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=47324#">Announcement of opportunity for Cluster guest investigators</a></li> <li>June 3 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=47112#">The Cluster archive: more than 1000 users</a><a class="footnote-ref" id="fnref:161" href="#fn:161"><sup>161</sup></a></li> <li>April 24 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=46875#">High-speed plasma jets: origin uncovered</a><a class="footnote-ref" id="fnref:162" href="#fn:162"><sup>162</sup></a></li> <li>March 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=46685#">Shocking recipe for 'killer electrons'</a><a class="footnote-ref" id="fnref:163" href="#fn:163"><sup>163</sup></a></li> <li>January 20 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=46333#">Multiple rifts in Earth's magnetic shield</a><a class="footnote-ref" id="fnref:164" href="#fn:164"><sup>164</sup></a></li></ul> <h3>2009</h3> <ul><li>October 7 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=45685#">ESA extends the Cluster mission until December 2012</a></li> <li>July 16 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=45273#">Cluster shows how solar wind is heated at electron scales</a><a class="footnote-ref" id="fnref:165" href="#fn:165"><sup>165</sup></a></li> <li>June 18 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=45044#">Cluster and Double Star: 1000 publications</a></li> <li>April 29 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=44687#">Monitoring the impact of extreme solar events</a><a class="footnote-ref" id="fnref:166" href="#fn:166"><sup>166</sup></a></li> <li>March 25 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=44480#">Cluster's insight into space turbulence</a><a class="footnote-ref" id="fnref:167" href="#fn:167"><sup>167</sup></a></li> <li>February 9 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=44174#">ESA extends the Cluster mission until the end of 2009</a></li> <li>January 14 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=44012#">Cluster detects invisible escaping ions</a><a class="footnote-ref" id="fnref:168" href="#fn:168"><sup>168</sup></a></li></ul> <h3>2008</h3> <ul><li>December 15 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43932#">The science of space weather</a><a class="footnote-ref" id="fnref:169" href="#fn:169"><sup>169</sup></a></li> <li>December 5 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43851#">Looking at Jupiter to understand Earth</a><a class="footnote-ref" id="fnref:170" href="#fn:170"><sup>170</sup></a></li> <li>October 17 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43567#">Highlights from Cluster-THEMIS workshop</a></li> <li>August 27 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43299#">Cluster examines Earth-escaping ions</a><a class="footnote-ref" id="fnref:171" href="#fn:171"><sup>171</sup></a></li> <li>August 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43238#">Electron trapping within reconnection</a><a class="footnote-ref" id="fnref:172" href="#fn:172"><sup>172</sup></a><a class="footnote-ref" id="fnref:173" href="#fn:173"><sup>173</sup></a></li> <li>June 27 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=43018#">Beamed radio emission from Earth</a><a class="footnote-ref" id="fnref:174" href="#fn:174"><sup>174</sup></a></li> <li>June 9 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=42863#">Reconnection - Triggered by Whistlers?</a><a class="footnote-ref" id="fnref:175" href="#fn:175"><sup>175</sup></a></li> <li>March 7 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=42432#">Solitons found in the magnetopause</a><a class="footnote-ref" id="fnref:176" href="#fn:176"><sup>176</sup></a></li> <li>January 23 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=42208#">Cluster result impacts future space missions</a><a class="footnote-ref" id="fnref:177" href="#fn:177"><sup>177</sup></a></li></ul> <h3>2007</h3> <ul><li>December 6 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41911#">Cluster explains nightside ion beams</a><a class="footnote-ref" id="fnref:178" href="#fn:178"><sup>178</sup></a></li> <li>November 21 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41817#">Cluster captures the impact of a Coronal Mass Ejection</a><a class="footnote-ref" id="fnref:179" href="#fn:179"><sup>179</sup></a><a class="footnote-ref" id="fnref:180" href="#fn:180"><sup>180</sup></a></li> <li>November 9 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41543#">Cluster probes generalized Ohm's law in space</a> <a class="footnote-ref" id="fnref:181" href="#fn:181"><sup>181</sup></a></li> <li>October 22 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41454#">Cluster monitors convection cells over the polar caps</a><a class="footnote-ref" id="fnref:182" href="#fn:182"><sup>182</sup></a><a class="footnote-ref" id="fnref:183" href="#fn:183"><sup>183</sup></a></li> <li>September 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41288#">Cluster and Double Star pinpoint the source of bright aurorae</a><a class="footnote-ref" id="fnref:184" href="#fn:184"><sup>184</sup></a></li> <li>July 26 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41208#">Cluster helps reveal how the Sun shakes the Earth's magnetic field</a><a class="footnote-ref" id="fnref:185" href="#fn:185"><sup>185</sup></a><a class="footnote-ref" id="fnref:186" href="#fn:186"><sup>186</sup></a></li> <li>June 29 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41145#">Cluster unveils a new 3D vision of magnetic reconnection</a><a class="footnote-ref" id="fnref:187" href="#fn:187"><sup>187</sup></a></li> <li>June 21 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=41120#">Formation flying at closest-ever separation</a></li> <li>May 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40994#">Cluster reveals the reformation of the Earth's bow shock</a><a class="footnote-ref" id="fnref:188" href="#fn:188"><sup>188</sup></a></li> <li>April 12 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40878#">Cluster finds new clues on what triggers space tsunamis</a><a class="footnote-ref" id="fnref:189" href="#fn:189"><sup>189</sup></a></li> <li>March 26 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40852#">First direct evidence in space of magnetic reconnection in turbulent plasma</a><a class="footnote-ref" id="fnref:190" href="#fn:190"><sup>190</sup></a></li> <li>March 12 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40761#">A leap forward in probing magnetic reconnection in space</a><a class="footnote-ref" id="fnref:191" href="#fn:191"><sup>191</sup></a></li> <li>February 9 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40651#">New insights in the auroral electrical circuit revealed by Cluster</a><a class="footnote-ref" id="fnref:192" href="#fn:192"><sup>192</sup></a></li></ul> <h3>2006</h3> <ul><li>December 29 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40465#">1000th Orbit for the Cluster Mission</a></li> <li>December 6 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40420#">Cluster finds magnetic reconnection within giant swirls of plasma</a><a class="footnote-ref" id="fnref:193" href="#fn:193"><sup>193</sup></a></li> <li>November 13 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40330#">Cluster takes a new look at the plasmasphere</a><a class="footnote-ref" id="fnref:194" href="#fn:194"><sup>194</sup></a><a class="footnote-ref" id="fnref:195" href="#fn:195"><sup>195</sup></a></li> <li>October 5 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=40032#">Double Star and Cluster witness pulsated reconnection for several hours</a><a class="footnote-ref" id="fnref:196" href="#fn:196"><sup>196</sup></a></li> <li>August 24 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=39865#">Cluster links magnetic substorms and Earthward directed high-speed flows</a><a class="footnote-ref" id="fnref:197" href="#fn:197"><sup>197</sup></a></li> <li>July 18 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=39706#">Magnetic heart of a 3D reconnection event revealed by Cluster</a><a class="footnote-ref" id="fnref:198" href="#fn:198"><sup>198</sup></a></li> <li>June 20 - <a href="http://www.space.com/2514-earth-surrounded-giant-fizzy-bubbles.html#">Space is fizzy</a><a class="footnote-ref" id="fnref:199" href="#fn:199"><sup>199</sup></a></li> <li>May 19 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=39246#">New Microscopic Properties of Magnetic Reconnection Derived by Cluster</a><a class="footnote-ref" id="fnref:200" href="#fn:200"><sup>200</sup></a></li> <li>March 30 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38993#">Cluster and Double Star reveal the extent of neutral sheet oscillations</a><a class="footnote-ref" id="fnref:201" href="#fn:201"><sup>201</sup></a></li> <li>February 24 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38841#">Cluster reveals fundamental 3-D properties of magnetic turbulence</a><a class="footnote-ref" id="fnref:202" href="#fn:202"><sup>202</sup></a></li> <li>February 1 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38705#">The Cluster Active Archive goes live</a></li> <li>January 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38574#">Cover of Nature Magazine: Feel the Force</a><a class="footnote-ref" id="fnref:203" href="#fn:203"><sup>203</sup></a></li></ul> <h3>2005</h3> <ul><li>December 22 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38475#">Cluster helps to protect astronauts and satellites against killer electrons</a><a class="footnote-ref" id="fnref:204" href="#fn:204"><sup>204</sup></a></li> <li>September 21 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=37944#">Double Star and Cluster observe first evidence of crustal cracking</a></li> <li>August 10 - <a href="http://www.esa.int/esaCP/SEM18O808BE_index_0.html#">From ‘macro’ to ‘micro’ – turbulence seen by Cluster</a><a class="footnote-ref" id="fnref:205" href="#fn:205"><sup>205</sup></a></li> <li>July 28 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=37592#">First direct measurements of the ring current</a><a class="footnote-ref" id="fnref:206" href="#fn:206"><sup>206</sup></a></li> <li>July 14 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=37680#">Five years of formation flying with Cluster</a></li> <li>April 28 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=36938#">Calming effect of a solar storm</a><a class="footnote-ref" id="fnref:207" href="#fn:207"><sup>207</sup></a><a class="footnote-ref" id="fnref:208" href="#fn:208"><sup>208</sup></a></li> <li>February 18 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=36556#">Cluster will become the first multi-scale mission</a></li> <li>February 4 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=36447#">Direct observation of 3D magnetic reconnection</a><a class="footnote-ref" id="fnref:209" href="#fn:209"><sup>209</sup></a></li></ul> <h3>2004</h3> <ul><li>December 12 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=36209#">Cluster determines the spatial scale of high speed flows in the magnetotail</a><a class="footnote-ref" id="fnref:210" href="#fn:210"><sup>210</sup></a></li> <li>November 24 <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=36142#">Four-point observations of solar wind discontinuities</a><a class="footnote-ref" id="fnref:211" href="#fn:211"><sup>211</sup></a></li> <li>September 17 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35847#">Cluster locates the source of non-thermal terrestrial continuum radiation by triangulation</a><a class="footnote-ref" id="fnref:212" href="#fn:212"><sup>212</sup></a></li> <li>August 12 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35672#">Cluster finds giant gas vortices at the edge of Earth's magnetic bubble</a><a class="footnote-ref" id="fnref:213" href="#fn:213"><sup>213</sup></a></li> <li>June 23 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35478#">Cluster discovers internal origin of the plasma sheet oscillations</a><a class="footnote-ref" id="fnref:214" href="#fn:214"><sup>214</sup></a></li> <li>May 13 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35501#">Cluster captures a triple cusp</a><a class="footnote-ref" id="fnref:215" href="#fn:215"><sup>215</sup></a></li></ul> <ul><li>May 11 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35501#">Cluster observes finite amplitude Alfvén waves and small-scale magnetic filaments downstream of a quasi-perpendicular shock</a><a class="footnote-ref" id="fnref:216" href="#fn:216"><sup>216</sup></a></li></ul> <ul><li>April 5 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=35500#">First attempt to estimate Earth's bow shock thickness</a><a class="footnote-ref" id="fnref:217" href="#fn:217"><sup>217</sup></a></li></ul> <h3>2001–2003</h3> <ul><li>3 December 2003 - <a href="https://science.nasa.gov/science-news/science-at-nasa/2003/03dec_magneticcracks#">Cracks in Earth's magnetic shield (NASA website)</a> <a href="https://web.archive.org/web/20211229152647/https://science.nasa.gov/science-news/science-at-nasa/2003/03dec_magneticcracks">Archived</a> 2021-12-29 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a><a class="footnote-ref" id="fnref:218" href="#fn:218"><sup>218</sup></a></li> <li>29 June 2003 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38338#">Multi-point observations of magnetic reconnection</a><a class="footnote-ref" id="fnref:219" href="#fn:219"><sup>219</sup></a></li> <li>20 May 2003 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=32256#">ESA's Cluster solves auroral puzzle</a><a class="footnote-ref" id="fnref:220" href="#fn:220"><sup>220</sup></a></li> <li>29 January 2003 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38334#">Bifurcation of the tail current</a><a class="footnote-ref" id="fnref:221" href="#fn:221"><sup>221</sup></a></li> <li>28 January 2003 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38326#">Electric current measured in space for the first time</a><a class="footnote-ref" id="fnref:222" href="#fn:222"><sup>222</sup></a></li> <li>29 December 2002 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38333#">Thickness of the tail current sheet estimated in space for the first time</a><a class="footnote-ref" id="fnref:223" href="#fn:223"><sup>223</sup></a></li> <li>1 October 2002 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38332#">Telescopic/Microscopic view of a substorm</a><a class="footnote-ref" id="fnref:224" href="#fn:224"><sup>224</sup></a></li> <li>11 December 2001 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=29100#">Cluster quartet probes the secrets of the black aurora</a><a class="footnote-ref" id="fnref:225" href="#fn:225"><sup>225</sup></a></li> <li>31 October 2001 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=38331#">First measurements of density gradients in space</a><a class="footnote-ref" id="fnref:226" href="#fn:226"><sup>226</sup></a></li> <li>9 October 2001 - <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=28549#">Double cusp observed by Cluster</a><a class="footnote-ref" id="fnref:227" href="#fn:227"><sup>227</sup></a></li> <li>1 February 2001 – <a href="http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=26053#">Official start of scientific operations</a></li></ul> <ul><li>Escoubet, C.P.; A. Masson; H. Laakso; M.L. Goldstein (2021). <a href="https://doi.org/10.1029%2F2021JA029474">"Cluster after 20 years of operations: Science highlights and technical challenges"</a>. <i>Journal of Geophysical Research: Space Physics</i>. 126 (8). <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2021JGRA..12629474E">2021JGRA..12629474E</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1029%2F2021JA029474">10.1029/2021JA029474</a>. <a href="/facts/Hdl_(identifier)/rdebSxmC">hdl</a>:<a href="https://hdl.handle.net/11603%2F25562">11603/25562</a>.</li> <li>Escoubet, C.P.; A. Masson; H. Laakso; M.L. Goldstein (2015). <a href="https://doi.org/10.5194%2Fangeo-33-1221-2015">"Recent highlights from Cluster, the first 3-D magnetospheric mission"</a>. <i>Annales Geophysicae</i>. 33 (10): 1221–1235. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2015AnGeo..33.1221E">2015AnGeo..33.1221E</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.5194%2Fangeo-33-1221-2015">10.5194/angeo-33-1221-2015</a>. <a href="/facts/Hdl_(identifier)/rdebSxmC">hdl</a>:<a href="https://hdl.handle.net/11603%2F31311">11603/31311</a>.</li> <li>Escoubet, C.P.; M. Taylor; A. Masson; H. Laakso; J. Volpp; M. Hapgood; M.L. Goldstein (2013). <a href="https://doi.org/10.5194%2Fangeo-31-1045-2013">"Dynamical processes in space: Cluster results"</a>. <i>Annales Geophysicae</i>. 31 (6): 1045–1059. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2013AnGeo..31.1045E">2013AnGeo..31.1045E</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.5194%2Fangeo-31-1045-2013">10.5194/angeo-31-1045-2013</a>.</li> <li>Taylor, M.; C.P. Escoubet; H. Laakso; A. Masson; M. Goldstein (2010). "The Cluster Mission: Space Plasma in Three Dimensions". In H. Laakso; et al. (eds.). <i>The Cluster Active Archive</i>. Astrophysics and Space Science Proceedings. Astrophys. & Space Sci. Proc., Springer. pp. 309–330. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1007%2F978-90-481-3499-1_21">10.1007/978-90-481-3499-1_21</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 978-90-481-3498-4.</li> <li>Escoubet, C.P.; M. Fehringer; M. Goldstein (2001). <a href="https://doi.org/10.5194%2Fangeo-19-1197-2001">"The Cluster mission"</a>. <i>Annales Geophysicae</i>. 19 (10/12): 1197–1200. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/2001AnGeo..19.1197E">2001AnGeo..19.1197E</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.5194%2Fangeo-19-1197-2001">10.5194/angeo-19-1197-2001</a>. <a href="/facts/Hdl_(identifier)/rdebSxmC">hdl</a>:<a href="https://hdl.handle.net/11603%2F30657">11603/30657</a>.</li> <li>Escoubet, C.P.; R. Schmidt; M.L. Goldstein (1997). "Cluster - Science and Mission Overview". <i>Space Science Reviews</i>. 79: 11–32. <a href="/facts/Bibcode_(identifier)/9HtdQSGB">Bibcode</a>:<a href="https://ui.adsabs.harvard.edu/abs/1997SSRv...79...11E">1997SSRv...79...11E</a>. <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1023%2FA%3A1004923124586">10.1023/A:1004923124586</a>. <a href="/facts/Hdl_(identifier)/rdebSxmC">hdl</a>:<a href="https://hdl.handle.net/11603%2F30578">11603/30578</a>. <a href="/facts/S2CID_(identifier)/ldJsHa2Y">S2CID</a> <a href="https://api.semanticscholar.org/CorpusID:116954846">116954846</a>.</li></ul> <h2 id="selected-publications">Selected publications</h2> <p>All 3806 publications related to the Cluster and the Double Star missions (count as of 30 June 2025) can be found on the <a href="https://www.cosmos.esa.int/web/csa/publications">publication section of the ESA Cluster mission website</a>. Among these publications, 3309 are refereed publications, 342 proceedings, 124 PhDs and 31 other types of theses. </p> <h2 id="external-links">External links</h2> <ul><li><a href="http://sci.esa.int/science-e/www/area/index.cfm?fareaid=8">ESA Cluster mission website</a></li> <li><a href="http://csa.esac.esa.int/">The Cluster Science Archive</a>, the public data archive of the Cluster and the Double Star missions</li> <li><a href="http://www.esa.int/SPECIALS/Operations/SEMYSMQJNVE_0.html">More on spacecraft operations</a></li> <li><a href="https://twitter.com/ESA_Cluster">ESA Cluster mission Twitter account</a></li> <li><a href="http://www3.imperial.ac.uk/spat/research/missions/space_missions/clusterhomepage/">Imperial College London role in the Cluster mission</a></li> <li><a href="http://www.ucl.ac.uk/mssl/space-plasma-physics/missions/cluster-peace/">University College London's Mullard Space Science Laboratory's role in the Cluster mission</a> <a href="https://web.archive.org/web/20160307102606/http://www.ucl.ac.uk/mssl/space-plasma-physics/missions/cluster-peace/">Archived</a> 2016-03-07 at the <a href="/facts/Wayback_Machine/nmQ3a6JC">Wayback Machine</a></li> <li><a href="http://royalsociety.org/summer-science/2011/aurora-explorer/">Cluster: aurora explorer, an exhibit at the Royal Society Summer Exhibition 2011</a></li> <li><a href="http://caa.esac.esa.int/caa/home.xml">The Cluster Active Archive</a> (former public data archive, up to 2014)</li> <li><a href="https://www.eoportal.org/satellite-missions/cluster">Cluster mission article on eoPortal by ESA</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Cluster II operations". European Space Agency. Retrieved 29 November 2011. <a href="http://www.esa.int/esaMI/Operations/SEMYSMQJNVE_0.html" target="_blank">http://www.esa.int/esaMI/Operations/SEMYSMQJNVE_0.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Extended life for ESA's science missions". ESA. 7 March 2023. Retrieved 20 March 2023. <a href="https://sci.esa.int/web/director-desk/-/extended-life-for-esa-s-science-missions" target="_blank">https://sci.esa.int/web/director-desk/-/extended-life-for-esa-s-science-missions</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Foust, Jeff (September 9, 2024). "ESA performs targeted reentry of Cluster satellite". SpaceNews. Retrieved September 9, 2024. <a href="https://spacenews.com/esa-performs-targeted-reentry-of-cluster-satellite/" target="_blank">https://spacenews.com/esa-performs-targeted-reentry-of-cluster-satellite/</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"Cluster II: Mission to the Earth's Magnetosphere". Max Planck Institute. 2024. Retrieved 9 September 2024. <a href="https://www.mps.mpg.de/planetary-science/cluster-mission" target="_blank">https://www.mps.mpg.de/planetary-science/cluster-mission</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"European Space Agency Announces Contest to Name the Cluster Quartet" (PDF). XMM-Newton Press Release. European Space Agency: 4. 2000. 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Retrieved 2021-07-14. <a href="https://sci.esa.int/web/double-star/-/39559-cluster-and-double-star-discover-density-holes-in-the-solar-wind" target="_blank">https://sci.esa.int/web/double-star/-/39559-cluster-and-double-star-discover-density-holes-in-the-solar-wind</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></p></li> <li id="fn:14"><p>Britt, Robert Roy (June 20, 2006). "CNN.com - Earth surrounded by giant fizzy bubbles - Jun 20, 2006". www.cnn.com. Archived from the original on 2006-06-22. Retrieved 2021-07-14. <a href="http://www.cnn.com/2006/TECH/space/06/20/space.bubbles/index.html" target="_blank">http://www.cnn.com/2006/TECH/space/06/20/space.bubbles/index.html</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></p></li> <li id="fn:15"><p>"ESA Science & Technology - Cluster and Double Star reveal the extent of neutral sheet oscillations". sci.esa.int. March 30, 2006. Archived from the original on 2021-04-18. Retrieved 2021-07-14. <a href="https://sci.esa.int/web/double-star/-/38999-cluster-and-double-star-reveal-the-extent-of-neutral-sheet-oscillations" target="_blank">https://sci.esa.int/web/double-star/-/38999-cluster-and-double-star-reveal-the-extent-of-neutral-sheet-oscillations</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></p></li> <li id="fn:16"><p>"Citation for the 2019 RAS Group Achievement Award (G): The Cluster Science and Operations teams" (PDF). Archived (PDF) from the original on 17 October 2023. <a href="https://ras.ac.uk/sites/default/files/2019-01/awards/Group%20Achievement%20Award%20-%20Cluster.pdf" target="_blank">https://ras.ac.uk/sites/default/files/2019-01/awards/Group%20Achievement%20Award%20-%20Cluster.pdf</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></p></li> <li id="fn:17"><p>"Laurels for Cluster-Double Star teams". ESA. 28 September 2010. Archived from the original on 17 October 2023. <a href="https://www.esa.int/Science_Exploration/Space_Science/Cluster/Laurels_for_Cluster-Double_Star_teams" target="_blank">https://www.esa.int/Science_Exploration/Space_Science/Cluster/Laurels_for_Cluster-Double_Star_teams</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></p></li> <li id="fn:18"><p>"EGU announces its 2023 awards and medals!". European Geosciences Union. 30 November 2022. Archived from the original on 7 March 2023. <a href="https://www.egu.eu/news/937/egu-announces-its-2023-awards-and-medals/" target="_blank">https://www.egu.eu/news/937/egu-announces-its-2023-awards-and-medals/</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></p></li> <li id="fn:19"><p>Nilsson, Anne Klint (8 May 2020). "Young IRF scientist awarded a Zeldovich Medal". Swedish Institute of Space Physics. Archived from the original on 17 October 2023. <a href="https://www.irf.se/en/news/2020/05/08/young-irf-scientist-awarded-a-zeldovich-medal/" target="_blank">https://www.irf.se/en/news/2020/05/08/young-irf-scientist-awarded-a-zeldovich-medal/</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></p></li> <li id="fn:20"><p>"Citation for the 2019 RAS 'G' Gold Medal: Professor Margaret Kivelson" (PDF). Archived (PDF) from the original on 17 October 2023. <a href="https://ras.ac.uk/sites/default/files/2019-01/awards/Gold%20Medal%20-%20Margaret%20Kivelson.pdf" target="_blank">https://ras.ac.uk/sites/default/files/2019-01/awards/Gold%20Medal%20-%20Margaret%20Kivelson.pdf</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></p></li> <li id="fn:21"><p>"ESSC member, Prof Hermann J Opgenoorth, awarded the Baron Marcel Nicolet Space Weather Medal 2018". 7 November 2018. Archived from the original on 26 November 2018. <a href="https://web.archive.org/web/20181126144803/http://www.esf.org/newsroom/news-and-press-releases/article/essc-member-prof-hermann-j-opgenoorth-awarded-the-baron-marcel-nicolet-space-weather-medal-2018/" target="_blank">https://web.archive.org/web/20181126144803/http://www.esf.org/newsroom/news-and-press-releases/article/essc-member-prof-hermann-j-opgenoorth-awarded-the-baron-marcel-nicolet-space-weather-medal-2018/</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></p></li> <li id="fn:22"><p>"Stephen A. Fuselier". Hannes Alfvén Medal 2016. European Geosciences Union. Archived from the original on 17 October 2023. <a href="https://www.egu.eu/awards-medals/hannes-alfven/2016/stephen-a-fuselier/" target="_blank">https://www.egu.eu/awards-medals/hannes-alfven/2016/stephen-a-fuselier/</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></p></li> <li id="fn:23"><p>"UK Space Weather Expert wins prestigious international award". Science and Technology Facilities Council. 15 November 2016. Archived from the original on 16 November 2016. <a href="https://web.archive.org/web/20161116164221/http://www.stfc.ac.uk/news/uk-space-weather-expert-wins-prestigious-international-award/" target="_blank">https://web.archive.org/web/20161116164221/http://www.stfc.ac.uk/news/uk-space-weather-expert-wins-prestigious-international-award/</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></p></li> <li id="fn:24"><p>"Rumi Nakamura". Julius Bartels Medal 2014. European Geosciences Union. Archived from the original on 17 October 2023. <a href="https://www.egu.eu/awards-medals/julius-bartels/2014/rumi-nakamura/" target="_blank">https://www.egu.eu/awards-medals/julius-bartels/2014/rumi-nakamura/</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></p></li> <li id="fn:25"><p>"Service Award". Winners of the 2013 awards, medals and prizes - full details. Royal Astronomical Society. Archived from the original on 19 March 2013. <a href="https://web.archive.org/web/20130319091432/http://www.ras.org.uk/awards-and-grants/awards/2210-winners-of-the-2013-awards-medals-and-prizes#service" target="_blank">https://web.archive.org/web/20130319091432/http://www.ras.org.uk/awards-and-grants/awards/2210-winners-of-the-2013-awards-medals-and-prizes#service</a> <a href="#fnref:25" class="footnote-back-ref">↩</a></p></li> <li id="fn:26"><p>"Göran Marklund". Hannes Alfvén Medal 2013. European Geosciences Union. Archived from the original on 17 October 2023. <a href="https://www.egu.eu/awards-medals/hannes-alfven/2013/goran-marklund/" target="_blank">https://www.egu.eu/awards-medals/hannes-alfven/2013/goran-marklund/</a> <a href="#fnref:26" class="footnote-back-ref">↩</a></p></li> <li id="fn:27"><p>"Chapman Medal (G)". Winners of the 2013 awards, medals and prizes - full details. Royal Astronomical Society. 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