{"id":9581,"date":"2015-11-26T19:40:33","date_gmt":"2015-11-26T18:40:33","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=9581"},"modified":"2015-11-26T19:40:33","modified_gmt":"2015-11-26T18:40:33","slug":"des-astronomes-photographient-des-exoplanetes-en-train-de-naitre","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/des-astronomes-photographient-des-exoplanetes-en-train-de-naitre\/","title":{"rendered":"Des astronomes photographient des exoplan\u00e8tes en train de na\u00eetre"},"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 style=\"text-align: justify;\">Une protoplan\u00e8te \u2013 une plan\u00e8te en formation \u2013 a \u00e9t\u00e9 observ\u00e9e pour la premi\u00e8re fois avec pr\u00e9cision, autour d&rsquo;une \u00e9toile situ\u00e9e \u00e0 450 ann\u00e9es-lumi\u00e8re de la Terre. Des astronomes l&rsquo;avait d\u00e9j\u00e0 rep\u00e9r\u00e9e en 2011, mais c&rsquo;est la premi\u00e8re fois qu&rsquo;une \u00e9quipe de scientifiques r\u00e9ussit \u00e0 la photographier, avec en prime deux autres \u00ab\u00a0cons\u0153urs\u00a0\u00bb en cours de formation, rapporte Futura-Sciences.<\/p>\n<p style=\"text-align: justify;\">Cette d\u00e9couverte a \u00e9t\u00e9 r\u00e9alis\u00e9e par des astronomes de l&rsquo;universit\u00e9 d&rsquo;Arizona (Etats-Unis) entre 2009 et 2015. Dans leur \u00e9tude publi\u00e9e dans la revue Nature (PDF en anglais) le 19 novembre 2015, les scientifiques expliquent avoir aper\u00e7u cette exoplan\u00e8te (c&rsquo;est-\u00e0-dire une plan\u00e8te tournant autour d&rsquo;une autre \u00e9toile que le Soleil) en train de na\u00eetre autour d&rsquo;une \u00e9toile baptis\u00e9e LkCa 15b. Cette \u00e9toile se situe dans la constellation du Taureau, et s&rsquo;est form\u00e9e il y a environ deux millions d&rsquo;ann\u00e9es.<\/p>\n<p style=\"text-align: justify;\">\u00ab\u00a0Existe-t-il d&rsquo;autres plan\u00e8tes habitables dans l&rsquo;Univers ?\u00a0\u00bb<\/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 style=\"text-align: justify;\">Pour r\u00e9ussir \u00e0 photographier ces exoplan\u00e8tes en formation, les scientifiques ont utilis\u00e9 le Large Binocular Telescope, pour avoir une image \u00ab\u00a0dans l&rsquo;infrarouge\u00a0\u00bb, et le t\u00e9lescope Magellan, pour pouvoir les observer \u00ab\u00a0dans le visible\u00a0\u00bb. \u00ab\u00a0Ces deux techniques sont tr\u00e8s diff\u00e9rentes\u00a0\u00bb, explique Francis Rocard, astrophysicien au Centre national d&rsquo;\u00e9tudes spatiales (Cnes), contact\u00e9 par francetv info. \u00ab\u00a0En infrarouge, on ne voit pas directement les plan\u00e8tes, car la lumi\u00e8re de l&rsquo;\u00e9toile est si puissante qu&rsquo;elle les rend invisibles. C&rsquo;est comme placer une bougie devant un phare de voiture.\u00a0\u00bb Quant \u00e0 la prise de vue \u00ab\u00a0dans le visible\u00a0\u00bb, elle est r\u00e9alis\u00e9e gr\u00e2ce \u00e0 l&rsquo;optique adaptative, une technique qui permet de restaurer des images d\u00e9grad\u00e9es par le rayonnement de l&rsquo;\u00e9toile, et donc de rendre visibles les protoplan\u00e8tes.<\/p>\n<p style=\"text-align: justify;\">Cette d\u00e9couverte est une avanc\u00e9e consid\u00e9rable pour les scientifiques, assure Francis Rocard.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/www.laterredufutur.com\/accueil\/\" target=\"_blank\">TDF<\/a><\/p>\n<p style=\"text-align: justify;\">extrait et source de : <a href=\"http:\/\/www.francetvinfo.fr\/sciences\/des-astronomes-photographient-des-exoplanetes-en-train-de-naitre_1193397.html#xtor=AL-79-%5Barticle%5D-%5Bconnexe%5D\" target=\"_blank\">http:\/\/www.francetvinfo.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"9581\">(282)<\/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>Une protoplan\u00e8te \u2013 une plan\u00e8te en formation \u2013 a \u00e9t\u00e9 observ\u00e9e pour la premi\u00e8re fois avec pr\u00e9cision, autour d&rsquo;une \u00e9toile&#8230;<\/p>\n","protected":false},"author":1,"featured_media":9582,"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_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":"Des astronomes photographient des #exoplan\u00e8tes en train de na\u00eetre @laterredufutur","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},"jetpack_post_was_ever_published":false},"categories":[22],"tags":[1519,1144,1948,5152,121,5154,363,5153],"class_list":["post-9581","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-astronomes","tag-etoiles","tag-extrasolaire","tag-optique","tag-planete","tag-protoplanetes","tag-systeme-solaire","tag-visible","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/planete-extrasolaire-systeme-solaire-en-formation.jpg?fit=630%2C354&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-2ux","jetpack-related-posts":[{"id":8802,"url":"https:\/\/www.laterredufutur.com\/accueil\/mais-que-se-passe-t-il-avec-letoile-kic-8462852\/","url_meta":{"origin":9581,"position":0},"title":"Mais que se passe t-il avec l&rsquo;\u00e9toile KIC 8462852 ?","author":"Admin","date":"16 octobre 2015","format":false,"excerpt":"En effet, depuis quelques heures, tous les m\u00e9dias sont sensibilis\u00e9s par l'\u00e9toile KIC 8462852. Le magazine en ligne explique qu'une \u00e9toile, KIC 8462852, observ\u00e9e par le t\u00e9lescope et situ\u00e9e 1.480 ann\u00e9es-lumi\u00e8re, avait quelque chose d'\u00e9trange. Comme le raconte Popular Science: \u00abQuand une plan\u00e8te passe devant une \u00e9toile, l'intensit\u00e9 de la\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\/2015\/10\/%C3%A9toile-KIC-8462852.jpg?fit=805%2C452&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/%C3%A9toile-KIC-8462852.jpg?fit=805%2C452&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/%C3%A9toile-KIC-8462852.jpg?fit=805%2C452&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/%C3%A9toile-KIC-8462852.jpg?fit=805%2C452&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":1886,"url":"https:\/\/www.laterredufutur.com\/accueil\/aurait-on-decouvert-la-premiere-planete-habitable\/","url_meta":{"origin":9581,"position":1},"title":"D\u00e9couverte de la premi\u00e8re exoplan\u00e8te habitable de m\u00eame taille que la Terre","author":"Admin","date":"27 mars 2014","format":false,"excerpt":"NASA : d\u00e9couverte de la premi\u00e8re exoplan\u00e8te d'une taille similaire \u00e0 la Terre dans une zone habitable.\u00a0La d\u00e9couverte excite la communaut\u00e9 scientifique depuis quelques jours : une \u00e9quipe d'astronomes a identifi\u00e9 la premi\u00e8re exoplan\u00e8te d'une taille similaire \u00e0 la Terre situ\u00e9e dans la zone habitable de son \u00e9toile. Les scientifiques\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":6730,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-astronomes-determines-a-trouver-la-vie-extraterrestre\/","url_meta":{"origin":9581,"position":2},"title":"Les astronomes d\u00e9termin\u00e9s \u00e0 trouver la vie extraterrestre","author":"Admin","date":"4 juin 2015","format":false,"excerpt":"\u00ab Trouver des traces de vie au-del\u00e0 de la Terre n\u2019est pas une utopie \u00bb, pense Natalie Batalha, astronome au Ames Research Center de la Nasa. \u00ab C\u2019est quelque chose que nous pouvons accomplir, peut-\u00eatre pas de mon vivant, mais peut-\u00eatre du vivant de ma fille \u00bb, estime-t-elle dans Gizmodo.\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\/2015\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/05\/exoplanete.jpg?fit=648%2C415&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":24359,"url":"https:\/\/www.laterredufutur.com\/accueil\/voici-la-premiere-image-directe-dune-exoplanete-par-le-telescope-james-webb\/","url_meta":{"origin":9581,"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":1394,"url":"https:\/\/www.laterredufutur.com\/accueil\/a-la-recherche-dune-exoplanete-habitable\/","url_meta":{"origin":9581,"position":4},"title":"A la recherche d&rsquo;une exoplan\u00e8te habitable","author":"Admin","date":"30 mai 2013","format":false,"excerpt":"Voici un documentaire sur la d\u00e9couverte d'une future Terre. Nous sommes \u00e0 la veille de la d\u00e9couverte de cette plan\u00e8te. Peux t'on r\u00e9ellement la d\u00e9couvrir ? Existe t-il quelque part une autre Terre ? A la recherche d'une exoplan\u00e8te habitable.\u00a0Ici on imagine \u00e0 quoi pourrait ressembler une plan\u00e8te habitable et\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"exoplanete","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/10\/exoplanete.jpg?fit=540%2C270&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/10\/exoplanete.jpg?fit=540%2C270&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/10\/exoplanete.jpg?fit=540%2C270&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":21641,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-de-la-premiere-exoplanete-toi-700d-de-la-taille-de-la-terre-dans-une-zone-habitable\/","url_meta":{"origin":9581,"position":5},"title":"D\u00e9couverte de la premi\u00e8re exoplan\u00e8te (TOI-700d) de la taille de la Terre dans une zone habitable","author":"Admin","date":"30 novembre 2020","format":false,"excerpt":"TESS, le satellite Transiting Exoplanet Survey, a \u00e9t\u00e9 lanc\u00e9 en 2018 dans le but de d\u00e9couvrir de petites plan\u00e8tes autour des \u00e9toiles les plus proches du Soleil, des \u00e9toiles suffisamment brillantes pour permettre le suivi des caract\u00e9risations des masses et des atmosph\u00e8res de leurs plan\u00e8tes.\u00a0TESS a jusqu'\u00e0 pr\u00e9sent d\u00e9couvert dix-sept\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\/2020\/11\/Exoplanete-TOI700d.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\/2020\/11\/Exoplanete-TOI700d.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/Exoplanete-TOI700d.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/Exoplanete-TOI700d.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/Exoplanete-TOI700d.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9581","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=9581"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9581\/revisions"}],"predecessor-version":[{"id":9583,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/9581\/revisions\/9583"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/9582"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=9581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=9581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=9581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}