{"id":264,"date":"2004-11-19T08:17:00","date_gmt":"2004-11-19T07:17:00","guid":{"rendered":"https:\/\/kids.esa.int\/life_around_other_stars\/"},"modified":"2026-10-08T00:26:11","modified_gmt":"2026-10-07T22:26:11","slug":"life_around_other_stars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/life_around_other_stars\/","title":{"rendered":"La vie autour d'autres \u00e9toiles"},"content":{"rendered":"<div class=\"lede\">\n<p>Y aurait-il de la vie autour d\u2019autres <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Stars_and_galaxies\/Stars\" target=\"_blank\" rel=\"noopener\">\u00e9toiles<\/a>? Peut-\u00eatre qu'en vivant \u00e0 <a href=\"http:\/\/www.esa.int\/kids\/en\/learn\/Life_in_Space\/Are_we_alone\/Exoplanets\" target=\"_blank\" rel=\"noopener\">plan\u00e8tes extrasolaires<\/a>! Mais d'o\u00f9 viennent ces plan\u00e8tes ?<\/p>\n<p>Tout comme les plan\u00e8tes de notre <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Planets_and_moons\/The_Solar_System_and_its_planets\" target=\"_blank\" rel=\"noopener\">Syst\u00e8me solaire<\/a>, les exoplan\u00e8tes se forment \u00e0 partir de nuages de gaz et de poussi\u00e8re issus des restes de l'\u00e9poque o\u00f9 leur <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Stars_and_galaxies\/Star_birth\" target=\"_blank\" rel=\"noopener\">comment naissent les \u00e9toiles<\/a>. Les nouvelles \u00e9toiles \u00e9mettent des ondes de choc dans l'espace qui provoquent la fusion de ces restes de mati\u00e8re, lesquels finissent, au fil du temps, par former des plan\u00e8tes.<\/p>\n<\/div>\n<p>\u00c9tonnamment, nous disposons de photos montrant la formation de syst\u00e8mes d\u2019exoplan\u00e8tes ! Le <a href=\"http:\/\/www.esa.int\/kids\/en\/learn\/Technology\/Spacecraft\/The_Hubble_Space_Telescope\" target=\"_blank\" rel=\"noopener\">T\u00e9lescope spatial Hubble de la NASA\/ESA<\/a> a servi \u00e0 \u00e9tudier la n\u00e9buleuse d'Orion et a permis de d\u00e9couvrir ce que les scientifiques appellent des disques protoplan\u00e9taires. Il s'agit probablement de tr\u00e8s jeunes syst\u00e8mes solaires en cours de formation ! Peut-\u00eatre qu'un jour, ils donneront naissance \u00e0 des plan\u00e8tes qui, \u00e0 terme, offriront les conditions id\u00e9ales pour que la vie s'y d\u00e9veloppe.<\/p>\n<p>Outre l'observation de syst\u00e8mes solaires en formation, les scientifiques ont d\u00e9j\u00e0 d\u00e9couvert des milliers de plan\u00e8tes extrasolaires pleinement form\u00e9es, et continuent d'en d\u00e9couvrir d'autres ! Bon nombre de ces plan\u00e8tes sont appel\u00e9es \u201c Jupiter chauds \u201d car elles sont de grande taille et poss\u00e8dent une masse \u00e9lev\u00e9e (comme <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Planets_and_moons\/Jupiter\" target=\"_blank\" rel=\"noopener\">Jupiter<\/a> dans notre propre syst\u00e8me solaire), mais elles orbitent \u00e9galement tr\u00e8s pr\u00e8s de leur \u00e9toile. Cela rendrait peu probable qu\u2019elles puissent abriter la vie telle que nous la connaissons ; cependant, \u00e0 mesure que nos techniques de d\u00e9tection des exoplan\u00e8tes s\u2019am\u00e9liorent, nous d\u00e9couvrons d\u00e9sormais des indices de l\u2019existence de plan\u00e8tes plus semblables \u00e0 la Terre.<\/p>\n<p>Il n'y a pas que les plan\u00e8tes qui tournent autour des \u00e9toiles. D'autres objets dans l'espace, tels que <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Comets_and_meteors\/Asteroids_the_minor_planets\" target=\"_blank\" rel=\"noopener\">ast\u00e9ro\u00efdes<\/a> et <a href=\"https:\/\/www.esa.int\/kids\/en\/learn\/Our_Universe\/Comets_and_meteors\/Comets\" target=\"_blank\" rel=\"noopener\">com\u00e8tes<\/a>, aussi. La vie pourrait-elle exister sur ces corps c\u00e9lestes ? C'est moins probable, mais il y a une possibilit\u00e9. Certains scientifiques pensent qu'il est possible que de minuscules micro-organismes puissent \u00eatre transport\u00e9s d'une plan\u00e8te \u00e0 l'autre sur des fragments de roche provenant d'ast\u00e9ro\u00efdes, voire \u00e0 travers de vastes \u00e9tendues de l'espace \u00e0 bord de com\u00e8tes ! Nous ne pouvons en \u00eatre s\u00fbrs, mais c'est une id\u00e9e int\u00e9ressante \u00e0 envisager.<\/p>\n<p>Pensez-vous que la vie peut exister autour d\u2019autres plan\u00e8tes ? Si c\u2019est le cas, d\u00e9couvrirons-nous un jour de nouvelles formes de vie ?<\/p>","protected":false},"excerpt":{"rendered":"<p>Could there be life around other stars? Perhaps, living on extrasolar planets! But where do these planets come from? Like the planets in our Solar System, exoplanets form from clouds [&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\/2019\/10\/lonely_hearts_club\/21126615-1-eng-GB\/Lonely_hearts_club.jpg","esa_banner_description":"There are billions of stars in the Universe\u2026 could there be life around any of them? Copyright: ESA\/Hubble & NASA, A. Bellini et al.; CC BY 4.0","esa_banner_credit":"ESA\/Hubble & NASA, A. Bellini et al.; CC BY 4.0","esa_banner_licence":"CC BY 4.0 INT or ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2019\/10\/Lonely_hearts_club","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":[14,10,13],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-264","post","type-post","status-publish","format-standard","hentry","category-are-we-alone","category-learn","category-life-in-space","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/264","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=264"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/264\/revisions"}],"predecessor-version":[{"id":1407,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/264\/revisions\/1407"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=264"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=264"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=264"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=264"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=264"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=264"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=264"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}