{"id":15166,"date":"2017-05-09T20:00:09","date_gmt":"2017-05-09T18:00:09","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=15166"},"modified":"2026-06-08T11:17:56","modified_gmt":"2026-06-08T11:17:56","slug":"une-nouvelle-exoplanete-qui-pourrait-accueillir-la-vie","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/une-nouvelle-exoplanete-qui-pourrait-accueillir-la-vie\/","title":{"rendered":"Une nouvelle exoplan\u00e8te qui pourrait accueillir la vie ?"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:0px 0 0px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Elle porte le doux nom de LHS 1140b. Situ\u00e9e dans la zone habitable autour d&rsquo;une \u00e9toile situ\u00e9e \u00e0 40 ann\u00e9es lumi\u00e8res de notre syst\u00e8me solaire, ce monde rocheux a toutes les caract\u00e9ristiques pour qu&rsquo;on y d\u00e9couvre \u00e9ventuellement la pr\u00e9sence d&rsquo;eau \u00e0 sa surface.<\/p>\n<p>LHS 1140b grimpe en t\u00eate de la liste des mondes potentiellement habitables.<\/p>\n<p>A un jet de pierre de la Terre<\/p>\n<p>La litt\u00e9rature mondiale en mati\u00e8re d&rsquo;astrophysique s&rsquo;enrichit presque chaque semaine de nouvelles publications relatives \u00e0 la d\u00e9couverte de nouvelles exoplan\u00e8tes. En 20 ans, gr\u00e2ce aux progr\u00e8s de l&rsquo;observation de l&rsquo;espace lointain, plus de 3.600 exoplan\u00e8tes ont \u00e9t\u00e9 recens\u00e9es. Mais moins de 200 sont probablement telluriques et leur nombre se r\u00e9duit \u00e0 peau de chagrin quand il s&rsquo;agit d&rsquo;h\u00e9berger potentiellement la vie.<\/p>\n<p>D&rsquo;o\u00f9 l&rsquo;enthousiasme des chercheurs \u00e0 la lecture de la publication dirig\u00e9e par Jason Dittmann du Harvard Smithsonian Center for Astrophysics au sujet de sa derni\u00e8re d\u00e9couverte, r\u00e9alis\u00e9e lors de son transit devant son \u00e9toile : LHC 1140b, qu&rsquo;il d\u00e9crit comme \u00ab\u00a0l&rsquo;exoplan\u00e8te la plus enthousiasmante de la d\u00e9cennie\u00a0\u00bb<\/p>\n<p>Des conditions id\u00e9ales pour la Vie<\/p>\n<p>D&rsquo;abord par sa proximit\u00e9 : LHC 1140b graviterait autour d&rsquo;une \u00e9toile situ\u00e9e \u00e0 40 ann\u00e9es-lumi\u00e8res de notre syst\u00e8me solaire, soit au coin de la rue \u00e0 l&rsquo;\u00e9chelle cosmique. Son diam\u00e8tre serait une fois et demie plus grand que celui de la Terre, sa masse 6,6 fois plus importante. Ce \u00ab\u00a0super-monde\u00a0\u00bb rocheux \u00e9voluerait surtout dans la zone habitable de son soleil.<\/p>\n<p>La prochaine \u00e9tape sera l&rsquo;\u00e9tude de l&rsquo;atmosph\u00e8re de LHC 1140b, qui r\u00e9v\u00e8lera ou non si elle poss\u00e8de les ingr\u00e9dients indispensables \u00e0 l&rsquo;\u00e9panouissement de la vie, comme l&rsquo;oxyg\u00e8ne, le dioxide de carbone ou le m\u00e9thane. L&rsquo;\u00e9tude de son rayonnement permettra d&rsquo;\u00e9valuer l&rsquo;\u00e9paisseur de cette atmosph\u00e8re, si elle existe, d&rsquo;en d\u00e9terminer la composition, de conna\u00eetre la pr\u00e9sence \u00e9ventuelle de nuages, etc. L&rsquo;observation de LHC 1140b est par ailleurs facilit\u00e9 du fait de l&rsquo;\u00e9toile autour de laquelle elle gravite : il s&rsquo;agit en effet d&rsquo;une naine rouge, le type d&rsquo;\u00e9toile le plus fr\u00e9quent dans notre univers. Sa taille n&rsquo;exc\u00e8de pas un cinqui\u00e8me de celle de notre Soleil. Elle a aussi l&rsquo;avantage d&rsquo;\u00eatre faiblement rayonnante donc beaucoup plus froide, et faiblement active. Un concours de circonstances in\u00e9dit qui permet de nourrir de grands espoirs sur le potentiel de LHC 1140b.<\/p>\n<p>source : <a href=\"https:\/\/www.clubic.com\/mag\/sciences\/actualite-829686-exoplanete-accueillir-vie.html\/\">http:\/\/www.clubic.com\/<\/a><\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Elle porte le doux nom de LHS 1140b. Situ\u00e9e dans la zone habitable autour d&rsquo;une \u00e9toile situ\u00e9e \u00e0 40 ann\u00e9es&#8230;<\/p>\n","protected":false},"author":1,"featured_media":14799,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[22],"tags":[117,359,6413,121],"class_list":["post-15166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-espace","tag-exoplanete","tag-lhs-1140","tag-planete","wpcat-22-id"],"jetpack_shortlink":"https:\/\/wp.me\/p631RN-3WC","jetpack-related-posts":[{"id":24647,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dune-nouvelle-exoplanete-habitable\/","url_meta":{"origin":15166,"position":0},"title":"D\u00e9couverte d&rsquo;une nouvelle exoplan\u00e8te habitable","author":"Fred Demars","date":"12 janvier 2023","format":false,"excerpt":"TOI 700 e est \u00e0 peu pr\u00e8s de la m\u00eame taille que la Terre, et a \u00e9t\u00e9 d\u00e9couverte non loin d'une autre plan\u00e8te, aussi situ\u00e9e dans une zone habitable. TOI 700 e, une exoplan\u00e8te potentiellement \"habitable\" d\u00e9couverte. Des scientifiques travaillant pour la mission TESS (Transiting Exoplanet Survey Satellite) de l'agence\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/toi-700-exoplanete-habitable.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/toi-700-exoplanete-habitable.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/toi-700-exoplanete-habitable.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/toi-700-exoplanete-habitable.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/toi-700-exoplanete-habitable.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":15360,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dune-nouvelle-super-terre-potentiellement-habitable\/","url_meta":{"origin":15166,"position":1},"title":"D\u00e9couverte d&rsquo;une nouvelle super terre potentiellement habitable","author":"Fred Demars","date":"9 juin 2017","format":false,"excerpt":"Une \u00e9quipe de scientifiques europ\u00e9ens a d\u00e9tect\u00e9 une nouvelle super-Terre \u00e0 seulement 21 ann\u00e9es lumi\u00e8res de notre plan\u00e8te. Elle p\u00e8se pr\u00e8s de 3 fois la Terre et les premiers \u00e9l\u00e9ments de recherche montrent qu\u2019il pourrait s\u2019agir d\u2019un monde rocheux abritant de l\u2019eau \u00e0 l\u2019\u00e9tat liquide. Une plan\u00e8te qui pourrait potentiellement\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/exoplanete.jpg?fit=900%2C549&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/exoplanete.jpg?fit=900%2C549&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/exoplanete.jpg?fit=900%2C549&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/exoplanete.jpg?fit=900%2C549&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":14700,"url":"https:\/\/www.laterredufutur.com\/accueil\/wolf-1061c-la-nouvelle-exoplanete-qui-pourrait-etre-habitable\/","url_meta":{"origin":15166,"position":2},"title":"Wolf 1061c : la nouvelle exoplan\u00e8te qui pourrait \u00eatre habitable","author":"Fred Demars","date":"29 janvier 2017","format":false,"excerpt":"Des chercheurs australiens ont d\u00e9couvert au Chili, une exoplan\u00e8te\u00a0qui est \u00e0 14 ann\u00e9es lumi\u00e8res de la notre et qui pourrait \u00eatre potentiellement habitable. Cette information qui date de d\u00e9cembre 2015 int\u00e9resse toujours plus les scientifiques aujourd'hui.\u00a0 Depuis la d\u00e9couverte des premiers exoplan\u00e8tes, les scientifiques cherchent ardemment celle qui pr\u00e9sentera les\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/trois-exoplanetes.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/trois-exoplanetes.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/trois-exoplanetes.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/trois-exoplanetes.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":19689,"url":"https:\/\/www.laterredufutur.com\/accueil\/de-la-decouverte-de-leau-autour-dune-exoplanete-potentiellement-habitable-a-la-declaration-de-la-navy-sur-les-ovnis\/","url_meta":{"origin":15166,"position":3},"title":"De la d\u00e9couverte de l&rsquo;eau autour d&rsquo;une exoplan\u00e8te potentiellement habitable, \u00e0 la d\u00e9claration de la Navy sur les Ovnis","author":"Fred Demars","date":"21 septembre 2019","format":false,"excerpt":"Situ\u00e9e \u00e0 plus d\u2019un million de milliards de kilom\u00e8tres de la Terre, cette plan\u00e8te est la \u00abmeilleur candidate\u00bb pour la recherche de signes de vie extraterrestre. De cette perle rare, \u00absuper int\u00e9ressante\u00bb, les astronomes savent encore peu de choses. Mais ce qu\u2019ils ont d\u00e9couvert est tr\u00e8s prometteur, et propulse cette\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/exoplanete-mondes-habitables.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":12156,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-vient-dannoncer-la-decouverte-de-1284-nouvelles-exoplanetes\/","url_meta":{"origin":15166,"position":4},"title":"La Nasa vient d&rsquo;annoncer la d\u00e9couverte de 1284 nouvelles exoplan\u00e8tes","author":"Fred Demars","date":"10 mai 2016","format":false,"excerpt":"La NASA affirme avoir d\u00e9couvert pas moins de 1284 nouvelles exoplan\u00e8tes comparables \u00e0 la Terre, ce qui porte \u00e0 2325 nouveaux objets c\u00e9lestes d\u00e9couverts par le t\u00e9lescope Kepler. Selon la NASA, 9 de ces plan\u00e8tes sont situ\u00e9es dans la zone d\u00e9finie comme \u00ab habitable \u00bb, c'est-\u00e0-dire assez pr\u00e8s du soleil\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/Kepler-planetes.jpg?fit=1200%2C807&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/Kepler-planetes.jpg?fit=1200%2C807&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/Kepler-planetes.jpg?fit=1200%2C807&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/Kepler-planetes.jpg?fit=1200%2C807&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/05\/Kepler-planetes.jpg?fit=1200%2C807&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":26843,"url":"https:\/\/www.laterredufutur.com\/accueil\/james-webb-capte-une-trace-de-vie-sur-lexoplanete-k2-18b\/","url_meta":{"origin":15166,"position":5},"title":"James Webb capte une trace de vie sur l&rsquo;exoplan\u00e8te K2-18b","author":"Fred Demars","date":"22 avril 2025","format":false,"excerpt":"Des mol\u00e9cules consid\u00e9r\u00e9es comme des signatures potentielles de la vie ont \u00e9t\u00e9 d\u00e9tect\u00e9es dans l\u2019atmosph\u00e8re de K2-18b, un exoplan\u00e8te situ\u00e9e \u00e0 124 ann\u00e9es-lumi\u00e8re. Une avanc\u00e9e majeure qui ravive s\u00e9rieusement la question de la vie ailleurs dans l\u2019Univers. L\u2019espoir d\u2019un jour prouver que nous ne sommes pas seuls dans l\u2019univers vient\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/05\/exoplanete-K2-18b.jpg?fit=526%2C510&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/05\/exoplanete-K2-18b.jpg?fit=526%2C510&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/05\/exoplanete-K2-18b.jpg?fit=526%2C510&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/02\/exoplanete.jpg?fit=1024%2C415&ssl=1","_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=15166"}],"version-history":[{"count":2,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15166\/revisions"}],"predecessor-version":[{"id":15168,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15166\/revisions\/15168"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/14799"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=15166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=15166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=15166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}