{"id":19396,"date":"2016-05-02T22:46:31","date_gmt":"2016-05-02T14:46:31","guid":{"rendered":"https:\/\/wp-productionenv-bjg9h2g2bgg5b8aa.southeastasia-01.azurewebsites.net\/news\/nasa-keeps-its-eye-on-a-trio-of-potentially-habitable-planets-just-40-light-years-away\/"},"modified":"2016-05-02T22:46:31","modified_gmt":"2016-05-02T14:46:31","slug":"nasa-keeps-its-eye-on-a-trio-of-potentially-habitable-planets-just-40-light-years-away","status":"publish","type":"post","link":"https:\/\/starpath.global\/news\/nasa-keeps-its-eye-on-a-trio-of-potentially-habitable-planets-just-40-light-years-away\/","title":{"rendered":"NASA keeps its eye on a trio of potentially habitable planets just 40 light-years away"},"content":{"rendered":"<figure id=\"attachment_247230\" aria-describedby=\"caption-attachment-247230\" style=\"width: 630px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full-width wp-image-247230\" src=\"https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2016\/05\/160502-planets-630x572.jpg\" alt=\"View of ultracool dwarf star with planets\" width=\"630\" height=\"572\" srcset=\"https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2016\/05\/160502-planets-630x572.jpg 630w, https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2016\/05\/160502-planets-768x697.jpg 768w, https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2016\/05\/160502-planets-1240x1126.jpg 1240w, https:\/\/cdn.geekwire.com\/wp-content\/uploads\/2016\/05\/160502-planets.jpg 1280w\" sizes=\"(max-width: 630px) 100vw, 630px\"><figcaption data-nosnippet=\"\" id=\"caption-attachment-247230\" class=\"wp-caption-text\">An artist\u2019s impression shows an imagined view from the surface one of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth. (Credit: ESO)<\/figcaption><\/figure>\n<p>Three potentially habitable and definitely weird planets have been detected orbiting an ultracool dwarf star that\u2019s 40 light-years away from Earth. They\u2019re too far to visit anytime soon, but close enough to spark&nbsp;interest from NASA and&nbsp;astrobiologists who want to study the conditions under which life could arise.<\/p>\n<p>\u201cWhy are we trying to detect Earthlike planets around the smallest and coolest stars in the solar neighborhood? The reason is simple: Systems around these tiny stars are the only places where we can detect life on an Earth-sized exoplanet with our current technology,\u201d Micha\u00ebl Gillon, an astronomer from the University of Li\u00e8ge in&nbsp;Belgium, said in a news release from the European Southern Observatory. \u201cSo if we want to find life elsewhere in the universe, this is where we should start to look.\u201d<\/p>\n<p>The discoveries are detailed in a study published today by the journal Nature.<\/p>\n<p>The star in question, known as TRAPPIST-1 in the constellation Aquarius, is ultracool not only because it\u2019s cool to think about extraterrestrial life: It\u2019s just on the edge of starhood, with 8 percent of our sun\u2019s mass and 0.05 percent of its luminosity.<\/p>\n<p>The dwarf star\u2019s proximity to Earth is one of the big reasons why little TRAPPIST-1 could be detected by a robotic observatory&nbsp;known as the <span style=\"text-decoration: underline;\">Tra<\/span>nsiting <span style=\"text-decoration: underline;\">P<\/span>lanets and <span style=\"text-decoration: underline;\">P<\/span>lanetes<span style=\"text-decoration: underline;\">i<\/span>mals <span style=\"text-decoration: underline;\">S<\/span>mall <span style=\"text-decoration: underline;\">T<\/span>elescope, or TRAPPIST. The 23-inch (0.6-meter) telescope is located at ESO\u2019s La Silla Observatory in Chile, but it\u2019s operated from a control room in&nbsp;Li\u00e8ge. The focus of the TRAPPIST project is to look for dim stars and the not-quite-stars known as brown dwarfs in our celestial neighborhood.<\/p>\n<p><iframe title=\"Artist\u2019s impression of the ultracool dwarf star TRAPPIST-1 from close to one of its planets\" src=\"https:\/\/www.youtube.com\/embed\/GsgebmHYUmg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen=\"\" data-ratio=\"0.5625\" data-width=\"800\" data-height=\"450\" style=\"display: block; margin: 0px; width: 800px; height: 450px;\"><\/iframe><\/p>\n<p>TRAPPIST\u2019s observations registered subtle dips in the brightness of the star\u2019s light&nbsp;\u2013 a tip-off that exoplanets might be passing in front of TRAPPIST-1\u2019s disk. Follow-up observations by several other telescopes confirmed the sizes and orbits of the three planets. All three are roughly Earth\u2019s size, but they orbit 20 to 100 times closer to their parent star than Earth does.<\/p>\n<p>If TRAPPIST-1 were as hot as our sun, those planets would be cooked. But because the star is ultracool, there\u2019s a chance that the planets are on the edge of the star system\u2019s habitable zone&nbsp;\u2013 that is, the region where water can exist as a liquid on the surface. That condition is considered key for the presence of life as we know it on Earth, and it may hold true for exoplanets as well. It\u2019s not a slam-dunk: Two of the planets might be a little too hot, and the other one&nbsp;might be a little too cold. But the potential for them to be just right, at least on some regions of the planet, is enough to get exobiologists excited.<\/p>\n<p><span class=\"icon-quotes-left\"><\/span>&nbsp;We will soon be able to study the atmospheric composition of these planets and to explore them first for water, then for traces of biological activity.<span class=\"icon-quotes-right\"><\/span><\/p>\n<p>The timing of the research published today is fortuitous. It turns out that two of TRAPPIST-1\u2019s planets are expected to cross the star\u2019s disk&nbsp;on Wednesday. The Hubble Space Telescope and other instruments are set to track the event, and there\u2019s a chance the resulting data could tell astronomers whether the planets\u2019 atmosphere\u2019s contain water vapor.<\/p>\n<p>NASA\u2019s Kepler space telescope is also scheduled to observe TRAPPIST-1\u2019s planetary transits during one of its planet-hunting&nbsp;K2 campaigns, starting in December and winding up in March 2017. By combining the data from Kepler and TRAPPIST, astronomers should be able to figure out the exoplanets\u2019 density and whether they\u2019re rocky, Earthlike worlds.<\/p>\n<p>In a news release, NASA said the TRAPPIST-1 system is an ideal target for the James Webb Space Telescope, which should be able to detect water vapor, methane, carbon dioxide and other chemicals of astrobiological interest in exoplanetary atmospheres. ESO is also planning to follow up on the TRAPPIST survey with a more ambitious project called&nbsp;SPECULOOS&nbsp;at its Paranal Observatory in Chile.<\/p>\n<p><em>\u201c<\/em>Thanks to several giant telescopes currently under construction, including ESO\u2019s E-ELT and the NASA\/ESA\/CSA James Webb Space Telescope due to launch for 2018, we will soon be able to study the atmospheric composition of these planets and to explore them first for water, then for traces of biological activity,\u201d said study co-author Julien de Wit, an astronomer at the Massachusetts Institute of Technology.<\/p>\n<p><em>Gillon and de Wit are among 15 authors of the Nature study, titled \u201cTemperate Earth-Sized Planets Transiting a Nearby Ultracool Dwarf Star.\u201d<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An artist\u2019s impression shows an imagined view from the surface one of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth. (Credit: ESO) Three potentially habitable and definitely weird planets have been detected orbiting an ultracool dwarf star that\u2019s 40 light-years away from Earth. They\u2019re too far to visit anytime soon, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[5009,559,190,4709,3403],"class_list":["post-19396","post","type-post","status-publish","format-standard","hentry","category-news","tag-eso","tag-exoplanets","tag-nasa","tag-planets","tag-trappist-1"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/19396"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=19396"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/19396\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=19396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=19396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=19396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}