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srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/William_herschel_Telescope_Dome.jpg/375px-William_herschel_Telescope_Dome.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/William_herschel_Telescope_Dome.jpg/500px-William_herschel_Telescope_Dome.jpg 2x" data-file-width="2048" data-file-height="1365" /></a><figcaption>The William Herschel Telescope building</figcaption></figure> <p><b>PlanetPol</b> was a ground-based, high sensitivity <a href="/wiki/Polarimeter" title="Polarimeter">polarimeter</a> based at the <a href="/wiki/William_Herschel_Telescope" title="William Herschel Telescope">William Herschel Telescope</a><sup id="cite_ref-PlanetPol_1-0" class="reference"><a href="#cite_note-PlanetPol-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> on the island of <a href="/wiki/La_Palma" title="La Palma">La Palma</a> in the <a href="/wiki/Canary_Islands" title="Canary Islands">Canary Islands</a>, <a href="/wiki/Spain" title="Spain">Spain</a> that has now been decommissioned. It was the most sensitive astronomical visual polarimeter ever built in fractional polarisation, a mantle that since its decommissioning now belongs to <a href="/w/index.php?title=HIgh_Precision_Polarimetric_Instrument_(HIPPI)&action=edit&redlink=1" class="new" title="HIgh Precision Polarimetric Instrument (HIPPI) (page does not exist)">HIPPI</a>. Although the device could be used for a wide range of astronomy, its primary use was the <a href="/wiki/Methods_of_detecting_extrasolar_planets#Polarimetry" class="mw-redirect" title="Methods of detecting extrasolar planets">detection of extrasolar planets</a>.<sup id="cite_ref-PlanetPol_1-1" class="reference"><a href="#cite_note-PlanetPol-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Results">Results</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=PlanetPol&action=edit&section=1" title="Edit section: Results"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>PlanetPol did not discover any extrasolar planets, however it was used to provide upper limits to planetary albedos in the known <a href="/wiki/55_Cancri" title="55 Cancri">55 Cnc</a> and <a href="/wiki/Tau_Bo%C3%B6tis" title="Tau Boötis">τ Boo</a> planetary systems.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Observations with the polarimeter in the Canary Islands, which are affected by dust from the Sahara, also identified airborne dust as a source of polarization within our atmosphere.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Additionally, PlanetPol provided measurements of the polarization of a few dozen nearby stars,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> which were later combined with southern hemisphere measurements from PlanetPol's successor, HIPPI,<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> to provide information about the nature of those stars and the distribution of the interstellar medium.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=PlanetPol&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-PlanetPol-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-PlanetPol_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-PlanetPol_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFHoughLucas,_P._W.Bailey,_J._A.Tamura,_M.2006" class="citation journal cs1">Hough, J. H.; Lucas, P. W.; Bailey, J. A.; Tamura, M.; et al. (2006-09-01). <a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006PASP..118.1305H">"PlanetPol: A Very High Sensitivity Polarimeter"</a>. <i>The Publications of the Astronomical Society of the Pacific</i>. <b>118</b> (847): 1302–1318. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2006PASP..118.1302H">2006PASP..118.1302H</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1086%2F507955">10.1086/507955</a></span><span class="reference-accessdate">. Retrieved <span class="nowrap">2012-01-22</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Publications+of+the+Astronomical+Society+of+the+Pacific&rft.atitle=PlanetPol%3A+A+Very+High+Sensitivity+Polarimeter&rft.volume=118&rft.issue=847&rft.pages=1302-1318&rft.date=2006-09-01&rft_id=info%3Adoi%2F10.1086%2F507955&rft_id=info%3Abibcode%2F2006PASP..118.1302H&rft.aulast=Hough&rft.aufirst=J.+H.&rft.au=Lucas%2C+P.+W.&rft.au=Bailey%2C+J.+A.&rft.au=Tamura%2C+M.&rft.au=Hirst%2C+E.&rft.au=Harrison%2C+D.&rft.au=Bartholomew-Biggs%2C+M&rft_id=http%3A%2F%2Fadsabs.harvard.edu%2Fcgi-bin%2Fnph-bib_query%3Fbibcode%3D2006PASP..118.1305H&rfr_id=info%3Asid%2Fen.wikipedia.org%3APlanetPol" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLucasHoughBaileyTamura2009" class="citation journal cs1">Lucas, P. W.; Hough, J. H.; Bailey, J. A.; Tamura, M.; Hirst, E.; Harrison, D. (2009-02-11). <a rel="nofollow" class="external text" href="https://doi.org/10.1111%2Fj.1365-2966.2008.14182.x">"Planetpol polarimetry of the exoplanet systems 55 Cnc and τ Boo"</a>. <i>Monthly Notices of the Royal Astronomical Society</i>. <b>393</b> (1): 229–244. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/0807.2568">0807.2568</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2009MNRAS.393..229L">2009MNRAS.393..229L</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1111%2Fj.1365-2966.2008.14182.x">10.1111/j.1365-2966.2008.14182.x</a></span>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0035-8711">0035-8711</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Monthly+Notices+of+the+Royal+Astronomical+Society&rft.atitle=Planetpol+polarimetry+of+the+exoplanet+systems+55+Cnc+and+%CF%84+Boo&rft.volume=393&rft.issue=1&rft.pages=229-244&rft.date=2009-02-11&rft_id=info%3Aarxiv%2F0807.2568&rft.issn=0035-8711&rft_id=info%3Adoi%2F10.1111%2Fj.1365-2966.2008.14182.x&rft_id=info%3Abibcode%2F2009MNRAS.393..229L&rft.aulast=Lucas&rft.aufirst=P.+W.&rft.au=Hough%2C+J.+H.&rft.au=Bailey%2C+J.+A.&rft.au=Tamura%2C+M.&rft.au=Hirst%2C+E.&rft.au=Harrison%2C+D.&rft_id=https%3A%2F%2Fdoi.org%2F10.1111%252Fj.1365-2966.2008.14182.x&rfr_id=info%3Asid%2Fen.wikipedia.org%3APlanetPol" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBaileyUlanowskiLucasHough2008" class="citation journal cs1">Bailey, Jeremy; Ulanowski, Z.; Lucas, P. 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href="/wiki/Exoplanetology" class="mw-redirect" title="Exoplanetology">Exoplanetology</a></li> <li><a href="/wiki/Exoplanet" title="Exoplanet">Exoplanet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Ground-based</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anglo-Australian_Planet_Search" title="Anglo-Australian Planet Search">AAPS</a></li> <li><a href="/wiki/Automated_Planet_Finder" title="Automated Planet Finder">APF</a></li> <li><a href="/wiki/Swiss_1.2-metre_Leonhard_Euler_Telescope" title="Swiss 1.2-metre Leonhard Euler Telescope">CORALIE</a></li> <li><a href="/wiki/East-Asian_Planet_Search_Network" title="East-Asian Planet Search Network">EAPSNet</a></li> <li><a href="/wiki/ELODIE_spectrograph" title="ELODIE spectrograph">ELODIE</a></li> <li><a href="/wiki/Extremely_Large_Telescope#Instrumentation" title="Extremely Large Telescope">EPICS</a></li> <li><a href="/wiki/ESPRESSO" title="ESPRESSO">ESPRESSO</a></li> <li><a href="/wiki/Fiber-optic_Improved_Next-generation_Doppler_Search_for_Exo-Earths" title="Fiber-optic Improved Next-generation Doppler Search for Exo-Earths">FINDS Exo-Earths</a></li> <li><a href="/wiki/Geneva_Extrasolar_Planet_Search" title="Geneva Extrasolar Planet Search">Geneva</a> <ul><li><a href="/wiki/High_Accuracy_Radial_Velocity_Planet_Searcher" title="High Accuracy Radial Velocity Planet Searcher">HARPS</a></li> <li><a href="/wiki/HARPS-N" title="HARPS-N">HARPS-N</a></li></ul></li> <li><a href="/wiki/Gemini_Planet_Imager" title="Gemini Planet Imager">GPI</a></li> <li><a href="/wiki/HATNet_Project" title="HATNet Project">HATNet</a></li> <li><a href="/wiki/Hunt_for_Exomoons_with_Kepler" title="Hunt for Exomoons with Kepler">HEK</a></li> <li><a href="/wiki/HiCIAO" class="mw-redirect" title="HiCIAO">HiCIAO</a></li> <li><a href="/wiki/HIRES" class="mw-redirect" title="HIRES">HIRES</a></li> <li><a href="/wiki/Kilodegree_Extremely_Little_Telescope" title="Kilodegree Extremely Little Telescope">KELT</a></li> <li><a href="/wiki/Lick%E2%80%93Carnegie_Exoplanet_Survey" title="Lick–Carnegie Exoplanet Survey">LCES</a></li> <li><a href="/wiki/Magellan_Planet_Search_Program" title="Magellan Planet Search Program">Magellan</a></li> <li><a href="/wiki/MARVELS" class="mw-redirect" title="MARVELS">MARVELS</a></li> <li><a href="/wiki/MASCARA" title="MASCARA">MASCARA</a></li> <li><a href="/wiki/MEarth_Project" title="MEarth Project">MEarth</a></li> <li><a href="/wiki/MicroFUN" title="MicroFUN">MicroFUN</a></li> <li><a href="/wiki/Miniature_Exoplanet_Radial_Velocity_Array" title="Miniature Exoplanet Radial Velocity Array">MINERVA</a> <ul><li><a href="/wiki/MINERVA-Australis" title="MINERVA-Australis">Australis</a></li></ul></li> <li><a href="/wiki/Microlensing_Observations_in_Astrophysics" title="Microlensing Observations in Astrophysics">MOA</a></li> <li><a href="/wiki/N2K_Consortium" title="N2K Consortium">N2K</a></li> <li><a href="/wiki/Next-Generation_Transit_Survey" title="Next-Generation Transit Survey">NGTS</a></li> <li><a href="/wiki/New_Mexico_Exoplanet_Spectroscopic_Survey_Instrument" title="New Mexico Exoplanet Spectroscopic Survey Instrument">NESSI</a></li> <li><a href="/wiki/Optical_Gravitational_Lensing_Experiment" title="Optical Gravitational Lensing Experiment">OGLE</a></li> <li><a href="/wiki/Okayama_Planet_Search_Program" title="Okayama Planet Search Program">OPSP</a></li> <li><a class="mw-selflink selflink">PlanetPol</a></li> <li><a href="/wiki/Project_1640" title="Project 1640">Project 1640</a></li> <li><a href="/wiki/PRL_Advanced_Radial-velocity_All-sky_Search" title="PRL Advanced Radial-velocity All-sky Search">PARAS</a></li> <li><a href="/wiki/Strategic_Explorations_of_Exoplanets_and_Disks_with_Subaru" title="Strategic Explorations of Exoplanets and Disks with Subaru">SEEDS</a></li> <li><a href="/wiki/Search_for_extraterrestrial_intelligence" title="Search for extraterrestrial intelligence">SETI</a></li> <li><a href="/wiki/SOPHIE_%C3%A9chelle_spectrograph" title="SOPHIE échelle spectrograph">SOPHIE</a></li> <li><a href="/wiki/SPECULOOS" title="SPECULOOS">SPECULOOS</a></li> <li><a href="/wiki/Spectro-Polarimetric_High-Contrast_Exoplanet_Research" title="Spectro-Polarimetric High-Contrast Exoplanet Research">SPHERE</a></li> <li><a href="/wiki/Wide_Angle_Search_for_Planets" title="Wide Angle Search for Planets">SuperWASP</a></li> <li><a href="/wiki/Systemic_(amateur_extrasolar_planet_search_project)" title="Systemic (amateur extrasolar planet search project)">Systemic</a></li> <li><a href="/wiki/Trans-Atlantic_Exoplanet_Survey" title="Trans-Atlantic Exoplanet Survey">TrES</a></li> <li><a href="/wiki/XO_Telescope" class="mw-redirect" title="XO Telescope">XO Telescope</a></li> <li><a href="/wiki/ZIMPOL/CHEOPS" title="ZIMPOL/CHEOPS">ZIMPOL/CHEOPS</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="3" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:HST_SWEEPS_Detail_2006.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HST_SWEEPS_Detail_2006.jpg/80px-HST_SWEEPS_Detail_2006.jpg" decoding="async" width="80" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HST_SWEEPS_Detail_2006.jpg/120px-HST_SWEEPS_Detail_2006.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5b/HST_SWEEPS_Detail_2006.jpg/160px-HST_SWEEPS_Detail_2006.jpg 2x" data-file-width="800" data-file-height="800" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:Keplerspacecraft-FocalPlane-cutout.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Keplerspacecraft-FocalPlane-cutout.svg/80px-Keplerspacecraft-FocalPlane-cutout.svg.png" decoding="async" width="80" height="46" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Keplerspacecraft-FocalPlane-cutout.svg/120px-Keplerspacecraft-FocalPlane-cutout.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Keplerspacecraft-FocalPlane-cutout.svg/160px-Keplerspacecraft-FocalPlane-cutout.svg.png 2x" data-file-width="716" data-file-height="416" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:LombergA1024.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/LombergA1024.jpg/80px-LombergA1024.jpg" decoding="async" width="80" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/LombergA1024.jpg/120px-LombergA1024.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/be/LombergA1024.jpg/160px-LombergA1024.jpg 2x" data-file-width="1596" data-file-height="1206" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Space missions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Past</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MOST_(satellite)" class="mw-redirect" title="MOST (satellite)">MOST</a> <span style="font-size:85%;">(2003–2019)</span></li> <li><a href="/wiki/Sagittarius_Window_Eclipsing_Extrasolar_Planet_Search" title="Sagittarius Window Eclipsing Extrasolar Planet Search">SWEEPS</a> <span style="font-size:85%;">using <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">HST</a></span> <span style="font-size:85%;">(2006)</span></li> <li><a href="/wiki/CoRoT" title="CoRoT">CoRoT</a> <span style="font-size:85%;">(2006–2013)</span></li> <li><a href="/wiki/EPOXI" title="EPOXI">EPOXI</a> <span style="font-size:85%;">using <i><a href="/wiki/Deep_Impact_(spacecraft)" title="Deep Impact (spacecraft)">Deep Impact</a></i></span> <span style="font-size:85%;">(2008–2013)</span></li> <li><a href="/wiki/Kepler_space_telescope" title="Kepler space telescope">Kepler</a> <span style="font-size:85%;">(2009–2018)</span> <ul><li><span style="font-size:85%;"><a href="/wiki/List_of_exoplanets_discovered_by_the_Kepler_space_telescope" title="List of exoplanets discovered by the Kepler space telescope">detected exoplanets</a></span></li></ul></li> <li><a href="/wiki/ASTERIA_(spacecraft)" title="ASTERIA (spacecraft)">ASTERIA</a> <span style="font-size:85%;">(2017–2020)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Current</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Gaia_(spacecraft)" title="Gaia (spacecraft)">Gaia</a></i> <span style="font-size:85%;">(2013–present)</span></li> <li><a href="/wiki/Transiting_Exoplanet_Survey_Satellite" title="Transiting Exoplanet Survey Satellite">TESS</a> <span style="font-size:85%;">(2018–present)</span></li> <li><a href="/wiki/CHEOPS" title="CHEOPS">CHEOPS</a> <span style="font-size:85%;">(2019–present)</span></li> <li><i><a href="/wiki/Hayabusa2" title="Hayabusa2">Hayabusa2</a></i> <span style="font-size:85%;">(2021–present)</span></li> <li><a href="/wiki/James_Webb_Space_Telescope" title="James Webb Space Telescope">James Webb Space Telescope</a> <span style="font-size:85%;">(2021–present)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Planned</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/PLATO_(spacecraft)" title="PLATO (spacecraft)">PLATO</a></i> <span style="font-size:85%;">(2026)</span></li> <li><a href="/wiki/ARIEL" title="ARIEL">ARIEL</a> <span style="font-size:85%;">(2029)</span></li> <li><a href="/wiki/Nancy_Grace_Roman_Space_Telescope" title="Nancy Grace Roman Space Telescope">Nancy Grace Roman Space Telescope</a> <span style="font-size:85%;">(mid-2020s)</span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Proposed</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Exoplanetary_Circumstellar_Environments_and_Disk_Explorer" title="Exoplanetary Circumstellar Environments and Disk Explorer">EXCEDE</a></li> <li><a href="/wiki/Habitable_Exoplanet_Imaging_Mission" class="mw-redirect" title="Habitable Exoplanet Imaging Mission">HabEx</a></li> <li><a href="/wiki/Large_Interferometer_For_Exoplanets" title="Large Interferometer For Exoplanets">LIFE</a></li> <li><a href="/wiki/Large_Ultraviolet_Optical_Infrared_Surveyor" title="Large Ultraviolet Optical Infrared Surveyor">LUVOIR</a></li> <li><a href="/wiki/Nautilus_Deep_Space_Observatory" title="Nautilus Deep Space Observatory">Nautilus Deep Space Observatory</a></li> <li><a href="/wiki/New_Worlds_Mission" title="New Worlds Mission">New Worlds Mission</a></li> <li><a href="/wiki/Origins_Space_Telescope" title="Origins Space Telescope">OST</a></li> <li><a href="/wiki/PEGASE" title="PEGASE">PEGASE</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Cancelled</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Darwin_(spacecraft)" title="Darwin (spacecraft)">Darwin</a></i></li> <li><a href="/wiki/EChO" title="EChO">EChO</a></li> <li><i><a href="/wiki/Eddington_(spacecraft)" title="Eddington (spacecraft)">Eddington</a></i></li> <li><a href="/wiki/Space_Interferometry_Mission" title="Space Interferometry Mission">Space Interferometry Mission</a></li> <li><a href="/wiki/Terrestrial_Planet_Finder" title="Terrestrial Planet Finder">Terrestrial Planet Finder</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Methods_of_detecting_exoplanets" title="Methods of detecting exoplanets">Detection methods</a></li> <li><a href="/wiki/Discoveries_of_exoplanets" title="Discoveries of exoplanets">Discoveries of exoplanets</a></li> <li><a href="/wiki/Habitable_zone_for_complex_life" title="Habitable zone for complex life">Habitable zone for complex life</a></li> <li><a href="/wiki/Lists_of_exoplanets" class="mw-redirect" title="Lists of exoplanets">Lists of exoplanets</a> <ul><li><a href="/wiki/List_of_nearest_exoplanets" title="List of nearest exoplanets">nearest</a></li></ul></li></ul> </div></td></tr><tr><td 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