{"id":23615,"date":"2022-01-05T12:55:12","date_gmt":"2022-01-05T11:55:12","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=23615"},"modified":"2022-01-05T12:55:12","modified_gmt":"2022-01-05T11:55:12","slug":"la-planete-9-et-le-telescope-james-webb","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/la-planete-9-et-le-telescope-james-webb\/","title":{"rendered":"La plan\u00e8te 9 et le telescope James Webb"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 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>Lorsque le t\u00e9lescope spatial James Webb (JWST) sera enfin en service d&rsquo;ici six mois, avec son miroir de 6,5 m\u00e8tres et sa gamme de longueurs d&rsquo;onde de 600 nm \u00e0 28 000 nm, il sera le t\u00e9lescope id\u00e9al pour r\u00e9soudre le plus grand myst\u00e8re de notre syst\u00e8me solaire, \u00e0 savoir la plan\u00e8te 9.<\/p>\n<p>Pour rappel, la Plan\u00e8te 9 est une plan\u00e8te hypoth\u00e9tique qui, selon les astronomes, existerait au-del\u00e0 de la r\u00e9gion de la ceinture de Kuiper. Elle serait pr\u00e8s de 4 fois plus grande que la Terre et 10 fois plus massive (en 2021, elle aurait plus de 6 masses terrestres). Elle est th\u00e9oriquement propos\u00e9e sur la base de la perturbation des orbites des objets au-del\u00e0 de l&rsquo;orbite de Neptune.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 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\n<p>Vous vous demandez peut-\u00eatre pourquoi le t\u00e9lescope spatial James Webb pourrait trouver la plan\u00e8te 9 ? Eh bien, parce que le t\u00e9lescope spatial James Webb est hautement sp\u00e9cialis\u00e9 dans l&rsquo;infrarouge et que les plan\u00e8tes sont connues pour briller intens\u00e9ment dans l&rsquo;infrarouge, car elles \u00e9mettent de la chaleur de leur int\u00e9rieur. M\u00eame si la plan\u00e8te 9 est une plan\u00e8te absorbante sombre comme la plan\u00e8te la plus sombre connue dans notre galaxie, Tres-2b (qui absorbe presque 100 % de la lumi\u00e8re de son \u00e9toile h\u00f4te), elle serait d\u00e9tectable par le JWST (parce qu&rsquo;elle brille dans l&rsquo;infrarouge). Une autre raison est que le grand miroir primaire du JWST et d&rsquo;autres miroirs l&rsquo;aideraient \u00e0 d\u00e9tecter m\u00eame les objets les plus faibles de notre galaxie.<\/p>\n<p>Adaptation <a href=\"https:\/\/www.laterredufutur.com\/accueil\/\">Terra Projects<\/a><\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"23616\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/la-planete-9-et-le-telescope-james-webb\/planete-9-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?fit=1187%2C774&amp;ssl=1\" data-orig-size=\"1187,774\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"planete 9\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?fit=300%2C196&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?fit=800%2C522&amp;ssl=1\" class=\"alignnone size-full wp-image-23616\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?resize=1187%2C774&#038;ssl=1\" alt=\"\" width=\"1187\" height=\"774\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?w=1187&amp;ssl=1 1187w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?resize=300%2C196&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?resize=800%2C522&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?resize=768%2C501&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"23615\">(875)<\/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>Lorsque le t\u00e9lescope spatial James Webb (JWST) sera enfin en service d&rsquo;ici six mois, avec son miroir de 6,5 m\u00e8tres&#8230;<\/p>\n","protected":false},"author":1,"featured_media":23616,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"La plan\u00e8te 9 et le t\u00e9lescope James Webb @laterredufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[22],"tags":[1947,7263,878],"class_list":["post-23615","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-james-webb","tag-planete-9","tag-telescope","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/planete-9.jpg?fit=1187%2C774&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-68T","jetpack-related-posts":[{"id":1676,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-telescope-spatial-james-webb\/","url_meta":{"origin":23615,"position":0},"title":"Le t\u00e9lescope spatial James Webb","author":"Admin","date":"8 d\u00e9cembre 2013","format":false,"excerpt":"On r\u00eavera de pouvoir observer directement les plan\u00e8tes extrasolaires, trouver de la vie, on r\u00eavera de pouvoir observer l'espace sur toutes ses formes avec une pr\u00e9cision jamais \u00e9gal\u00e9e par le t\u00e9lescope Hubble qui fut une prouesse en son temps ! Et ce r\u00eave va devenir une r\u00e9alit\u00e9 sous le nom\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":24289,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-telescope-james-webb-vient-de-prouver-quil-peut-detecter-des-signes-de-vie-dans-les-atmospheres-des-planetes-et-exoplanetes\/","url_meta":{"origin":23615,"position":1},"title":"Le t\u00e9lescope James Webb vient de prouver qu&rsquo;il peut d\u00e9tecter des signes de vie dans les atmosph\u00e8res des plan\u00e8tes et exoplan\u00e8tes","author":"Admin","date":"11 ao\u00fbt 2022","format":false,"excerpt":"Les ingr\u00e9dients de la vie sont r\u00e9partis dans l'Univers. Si la Terre est le seul endroit connu de l'Univers o\u00f9 la vie est pr\u00e9sente, la d\u00e9tection de la vie au-del\u00e0 de la Terre est un objectif majeur de l'astronomie moderne et de la science plan\u00e9taire. Nous sommes deux scientifiques \u00e0\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\/2022\/08\/exoplanete-trappist.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\/2022\/08\/exoplanete-trappist.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-trappist.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/08\/exoplanete-trappist.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23570,"url":"https:\/\/www.laterredufutur.com\/accueil\/cest-un-miracle-de-noel-le-telescope-spatial-james-webb-est-sur-la-rampe-de-lancement-vers-une-nouvelle-revolution-spatiale\/","url_meta":{"origin":23615,"position":2},"title":"C&rsquo;est un miracle de No\u00ebl : le t\u00e9lescope spatial James Webb est sur la rampe de lancement ! Vers une nouvelle r\u00e9volution spatiale","author":"Admin","date":"24 d\u00e9cembre 2021","format":false,"excerpt":"La communaut\u00e9 scientifique re\u00e7oit cette ann\u00e9e un cadeau de No\u00ebl tr\u00e8s attendu : le lancement tr\u00e8s retard\u00e9 du t\u00e9lescope spatial James Webb ! Le successeur du tr\u00e8s appr\u00e9ci\u00e9 Hubble, le t\u00e9lescope spatial James Webb, ou JWST, devait initialement \u00eatre lanc\u00e9 en 2007. Aujourd'hui, 14 ans plus tard, tous les syst\u00e8mes\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\/2021\/12\/james-webb-telescope.png?fit=1009%2C566&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.png?fit=1009%2C566&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.png?fit=1009%2C566&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.png?fit=1009%2C566&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":24359,"url":"https:\/\/www.laterredufutur.com\/accueil\/voici-la-premiere-image-directe-dune-exoplanete-par-le-telescope-james-webb\/","url_meta":{"origin":23615,"position":3},"title":"Voici la premi\u00e8re image directe d&rsquo;une exoplan\u00e8te par le t\u00e9lescope James Webb","author":"Admin","date":"3 septembre 2022","format":false,"excerpt":"Le JWST a \u00e9galement obtenu le premier spectre direct d'un objet en orbite autour d'une \u00e9toile dans un autre syst\u00e8me solaire. Il s'agit de la premi\u00e8re image d'une exoplan\u00e8te prise par le t\u00e9lescope spatial James Webb. \"Nous mesurons en fait les photons de l'atmosph\u00e8re de la plan\u00e8te elle-m\u00eame\", explique l'astronome\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\/2022\/09\/premiere-exoplanete-observee-par-le-telescope-james-webb.jpg?fit=1030%2C580&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/premiere-exoplanete-observee-par-le-telescope-james-webb.jpg?fit=1030%2C580&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/premiere-exoplanete-observee-par-le-telescope-james-webb.jpg?fit=1030%2C580&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/premiere-exoplanete-observee-par-le-telescope-james-webb.jpg?fit=1030%2C580&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27642,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-lance-le-telescope-pandora-faisant-passer-la-recherche-de-mondes-habitables-par-le-jwst-a-un-niveau-superieur\/","url_meta":{"origin":23615,"position":4},"title":"La NASA lance le t\u00e9lescope Pandora, faisant passer la recherche de mondes habitables par le JWST \u00e0 un niveau sup\u00e9rieur","author":"Admin","date":"22 janvier 2026","format":false,"excerpt":"La recherche d'exoplan\u00e8tes habitables men\u00e9e par le t\u00e9lescope James Webb b\u00e9n\u00e9ficie d'un coup de pouce important gr\u00e2ce \u00e0 son nouveau compagnon d'observation des \u00e9toiles, Pandora. Le 11 janvier 2026, j'ai regard\u00e9 avec anxi\u00e9t\u00e9, depuis la base spatiale de Vandenberg en Californie, un lieu \u00e9troitement contr\u00f4l\u00e9, une fus\u00e9e Falcon 9 de\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\/02\/exoplanete.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/exoplanete.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/exoplanete.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/exoplanete.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":26334,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-jwst-telescope-james-webb-repere-le-premier-monde-de-vapeur-deau-connu\/","url_meta":{"origin":23615,"position":5},"title":"Le JWST (telescope James Webb) rep\u00e8re le premier \u00ab monde de vapeur d&rsquo;eau\u00bb connu","author":"Admin","date":"24 octobre 2024","format":false,"excerpt":"Au-del\u00e0 de notre syst\u00e8me solaire, la pression de ce monde aquatique pourrait cr\u00e9er des formes de mati\u00e8re bizarres. L'atmosph\u00e8re de cette exoplan\u00e8te fonctionne \u00e0 plein r\u00e9gime. Une plan\u00e8te situ\u00e9e au-del\u00e0 de notre syst\u00e8me solaire, appel\u00e9e GJ 9827d, poss\u00e8de une atmosph\u00e8re presque enti\u00e8rement compos\u00e9e de mol\u00e9cules d'eau chaude, rapportent des astronomes\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\/10\/exoplanete.webp?fit=1030%2C580&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/10\/exoplanete.webp?fit=1030%2C580&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/10\/exoplanete.webp?fit=1030%2C580&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/10\/exoplanete.webp?fit=1030%2C580&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/23615","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=23615"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/23615\/revisions"}],"predecessor-version":[{"id":23617,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/23615\/revisions\/23617"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/23616"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=23615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=23615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=23615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}