{"id":977,"date":"2006-10-26T14:18:00","date_gmt":"2006-10-26T12:18:00","guid":{"rendered":"https:\/\/kids.esa.int\/europe_prepares_to_search_for_distant_earths\/"},"modified":"2026-10-08T00:34:26","modified_gmt":"2026-10-07T22:34:26","slug":"europe_prepares_to_search_for_distant_earths","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/europe_prepares_to_search_for_distant_earths\/","title":{"rendered":"L'Europe se pr\u00e9pare \u00e0 rechercher des \u00ab plan\u00e8tes Terre \u00bb \u00e9loign\u00e9es"},"content":{"rendered":"<div class=\"lede\">\n<p>Existe-t-il de petites plan\u00e8tes similaires \u00e0 la Terre en orbite autour d'\u00e9toiles distantes ? A quoi ressemble l'int\u00e9rieur des \u00e9toiles naines et des \u00e9toiles g\u00e9antes ? COROT, t\u00e9lescope europ\u00e9en unique en son genre, r\u00e9pondra bient\u00f4t \u00e0 ces deux questions tr\u00e8s diff\u00e9rentes.<\/p>\n<\/div>\n<p>COROT, dont le lancement est pr\u00e9vu pour le mois de d\u00e9cembre 2006, sera le premier satellite d\u00e9di\u00e9 \u00e0 la recherche de plan\u00e8tes en orbite autour d'\u00e9toiles \u00e9loign\u00e9es. De telles plan\u00e8tes sont normalement invisibles car elles sont masqu\u00e9es par la lumi\u00e8re de leur soleil. COROT surmonte ce probl\u00e8me en recherchant une minuscule r\u00e9duction de luminosit\u00e9 stellaire provoqu\u00e9e par le passage d'une plan\u00e8te devant son \u00e9toile m\u00e8re.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"3330\" data-credit=\"ESO\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/03\/Exoplanet2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2006\/03\/exoplanet2\/17906718-2-eng-GB\/Exoplanet.jpe\" alt=\"\"><\/figure>\n<p>L'\u00e9tude des \u00ab tremblements \u00bb des \u00e9toiles distantes a donn\u00e9 aux astronomes une preuve indirecte de l'existence de plus de 200 plan\u00e8tes au-del\u00e0 de notre syst\u00e8me solaire. La plupart de ces plan\u00e8tes sont cependant des g\u00e9ants gazeux, \u00e0 c\u00f4t\u00e9 desquels la Terre est minuscule. COROT devrait permettre de d\u00e9tecter un nombre sup\u00e9rieur de ces \u00ab Jupiters chaudes \u00bb. Il est cependant probable que certaines plan\u00e8tes d\u00e9tect\u00e9es par COROT seront \u00e0 peine plus grosses que la Terre.<\/p>\n<p>COROT est particuli\u00e8rement sensible aux plan\u00e8tes de taille r\u00e9duite \u00e0 orbite de 50 jours maximum. Avec une telle dur\u00e9e d'orbite, ces plan\u00e8tes seraient plus proches de leur \u00e9toile m\u00e8re que Mercure par rapport au Soleil, et leur temp\u00e9rature serait trop \u00e9lev\u00e9e pour permettre la vie - sauf dans le cas d'une naine rouge froide.<\/p>\n<p>Au cours de sa mission de deux ans et demi, COROT \u00e9tudiera \u00e9galement les variations de luminosit\u00e9 de milliers d'\u00e9toiles. Sa cam\u00e9ra sp\u00e9ciale d\u00e9tectera les infimes variations de luminosit\u00e9 provoqu\u00e9es par les \u00ab tremblements d'\u00e9toiles \u00bb \u2013 des ondes sonores se propageant \u00e0 la surface. Celles-ci permettront aux scientifiques de d\u00e9terminer les conditions qui r\u00e8gnent \u00e0 l'int\u00e9rieur de l'\u00e9toile.<\/p>","protected":false},"excerpt":{"rendered":"<p>Are there any small, Earthlike planets orbiting distant stars? What is it like inside giant and dwarf stars? These two, very different, questions will soon be answered by a unique [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2006\/10\/artist_s_impression_of_corot2\/17877442-2-eng-GB\/Artist_s_impression_of_COROT.jpg","esa_banner_description":"Artist's impression of COROT","esa_banner_credit":"CNES\/D.Ducros","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/10\/Artist_s_impression_of_COROT2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[10,11,21],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-977","post","type-post","status-publish","format-standard","hentry","category-learn","category-our-universe","category-stars-and-galaxies"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/977","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=977"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/977\/revisions"}],"predecessor-version":[{"id":4770,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/977\/revisions\/4770"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=977"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=977"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=977"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=977"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=977"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=977"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=977"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=977"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=977"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=977"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}