{"id":1038,"date":"2010-05-12T08:05:00","date_gmt":"2010-05-12T06:05:00","guid":{"rendered":"https:\/\/kids.esa.int\/herschel_highlights_hidden_stars\/"},"modified":"2026-10-08T00:35:11","modified_gmt":"2026-10-07T22:35:11","slug":"herschel_highlights_hidden_stars","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/herschel_highlights_hidden_stars\/","title":{"rendered":"Herschel \u00e9claire les \u00e9toiles cach\u00e9es"},"content":{"rendered":"<div class=\"lede\">\n<p>Il y a un an, l'observatoire spatial Herschel de l\u2019ESA partait pour une mission d\u2019exploration de l\u2019Univers infrarouge. Orbitant aujourd'hui en toute s\u00e9curit\u00e9 \u00e0 quelques 1,5 millions de km de la Terre, Herschel commence \u00e0 nous r\u00e9v\u00e9ler des d\u00e9tails auparavant cach\u00e9s sur la formation des \u00e9toiles. De nouvelles images montrent des milliers de galaxies lointaines qui donnent naissance \u00e0 des \u00e9toiles et des nuages de formation stellaire \u00e9parpill\u00e9s dans la Voie Lact\u00e9e.<\/p>\n<\/div>\n<p>Herschel, qui est le plus grand observatoire astronomique \u00e0 avoir jamais \u00e9t\u00e9 plac\u00e9 dans l\u2019espace, est dot\u00e9 d\u2019un miroir quatre fois plus grand que ceux des t\u00e9lescopes spatiaux infrarouges qui l\u2019ont pr\u00e9c\u00e9d\u00e9. Ceci permet d\u2019\u00e9tudier les nuages de formation stellaire froids de notre galaxie de mani\u00e8re bien plus d\u00e9taill\u00e9e qu'auparavant. L\u2019une de ces r\u00e9gions, connue sous le sigle RCW 120, contient une \u00e9toile embryonnaire qui semble tout avoir pour devenir l\u2019une des plus grosses \u00e9toiles de notre galaxie d\u2019ici quelques centaines de milliers d\u2019ann\u00e9es.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"2545\" data-credit=\"ESA\/Hi-GAL Consortium\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/05\/Stellar_pregnancy_and_birth_in_the_Milky_Way2\" 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\/2010\/05\/stellar_pregnancy_and_birth_in_the_milky_way2\/17885989-2-eng-GB\/Stellar_pregnancy_and_birth_in_the_Milky_Way.jpg\" alt=\"Stellar pregnancy and birth in the Milky Way\"><\/figure>\n<p>D\u2019une masse d\u00e9j\u00e0 8 \u00e0 10 sup\u00e9rieure \u00e0 celle du Soleil, elle est entour\u00e9e d\u2019un nuage de gaz et de poussi\u00e8re qui lui permet de s\u2019alimenter et de grandir. Les scientifiques, qui ignorent encore comment des \u00e9toiles peuvent gonfler jusqu\u2019\u00e0 atteindre 150 masses solaires, vont observer attentivement la r\u00e9gion RCW 120 pour d\u00e9couvrir comme se forment les \u00e9toiles g\u00e9antes.<\/p>\n<p>Une autre image de Herschel montre comment la mati\u00e8re pr\u00e9sente dans la Voie Lact\u00e9e s\u2019accumule pour former des \u00e9toiles. Les \u00ab graines \u00bb apparaissent d\u2019abord au sein de filaments de poussi\u00e8re et de gaz incandescents, qui forment des cha\u00eenes de pouponni\u00e8res d\u2019\u00e9toiles qui s\u2019\u00e9tendent sur des distances de plusieurs dizaines d\u2019ann\u00e9es-lumi\u00e8re.<\/p>\n<p>L'\u00e9tude de la luminosit\u00e9 de ces points lumineux a permis de d\u00e9montrer que les \u00e9toiles se formaient 10 \u00e0 15 fois plus vite autrefois qu'aujourd'hui. Herschel a \u00e9galement d\u00e9tect\u00e9 de la mati\u00e8re qui n'existe pas \u00e0 l'\u00e9tat naturel sur Terre : des mol\u00e9cules d'eau qui ont \u00e9t\u00e9 scind\u00e9es par un rayonnement puissant et charg\u00e9es \u00e9lectriquement.<\/p>","protected":false},"excerpt":{"rendered":"<p>One year ago, ESA\u2019s Herschel space observatory was launched on a mission to explore the infrared Universe. Now safely orbiting about 1.5 million km from Earth, Herschel is beginning to [&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\/2010\/05\/the_galactic_bubble_rcw_1202\/17893944-2-eng-GB\/The_Galactic_bubble_RCW_120.jpg","esa_banner_description":"","esa_banner_credit":"ESA\/PACS\/SPIRE\/HOBYS Consortia","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/05\/The_Galactic_bubble_RCW_1202","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-1038","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\/1038","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=1038"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/1038\/revisions"}],"predecessor-version":[{"id":4811,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/1038\/revisions\/4811"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=1038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=1038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=1038"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=1038"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=1038"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=1038"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=1038"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=1038"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=1038"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=1038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}