{"id":137181,"date":"2024-01-13T18:27:28","date_gmt":"2024-01-13T17:27:28","guid":{"rendered":"https:\/\/sftarticles.wpenginepowered.com\/es\/?p=324659"},"modified":"2025-06-12T11:09:47","modified_gmt":"2025-06-12T10:09:47","slug":"la-nasa-ny-croit-pas-une-galaxie-sans-etoiles","status":"publish","type":"post","link":"https:\/\/cms-articles.softonic.io\/fr\/la-nasa-ny-croit-pas-une-galaxie-sans-etoiles\/","title":{"rendered":"La NASA n&#8217;y croit pas : une galaxie sans \u00e9toiles"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">L&#8217;objet troublant vide, appel\u00e9 J0613+52, est situ\u00e9 \u00e0 270 millions d&#8217;ann\u00e9es-lumi\u00e8re de distance et semble \u00eatre une galaxie \u00e0 faible luminosit\u00e9 de surface (LSB). <\/p>\n\n\n<div class=\"sc-card-program\">\r\n  <div class=\"sc-card-program__body\">\r\n    <div class=\"sc-card-program__row clearfix\">\r\n      <div class=\"sc-card-program__col-logo\">\r\n        <img decoding=\"async\" class=\"sc-card-program__img\" src=\"https:\/\/images.sftcdn.net\/images\/t_app-icon-s\/p\/2cddcc48-a4d6-11e6-88af-00163ec9f5fa\/3678680588\/nasa-app-logo\" alt=\"Application NASA\" width=\"100px\" height=\"100px\">\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-title\">\r\n        <span class=\"sc-card-program__title\">Application NASA<\/span>\r\n        <a class=\"sc-card-program__button sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\">T\u00c9L\u00c9CHARGER<\/a>\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-rating\">\r\n        \r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <span class=\"sc-card-program__description\"><\/span>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <img decoding=\"async\" class=\"sc-card-program__bigpic\" src=\"\">\r\n    <\/div>\r\n    <a class=\"sc-card-program__link track-link sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\"><\/a>\r\n  <\/div>\r\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Comme son nom l&#8217;indique, <strong>une LSB est beaucoup moins brillante que les autres objets lumineux qui peuplent le ciel nocturne<\/strong> car les gaz qu&#8217;elle contient sont si dispers\u00e9s qu&#8217;ils forment peu d&#8217;\u00e9toiles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cette d\u00e9couverte pourrait fournir un aper\u00e7u rare, peut-\u00eatre jamais vu auparavant, qui <strong>remet en question notre compr\u00e9hension de la formation des \u00e9toiles et des galaxies.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"fr\" dir=\"ltr\">D\u00e9couverte d&#39;une \u00e9trange galaxie sans \u00e9toiles visibles. Elle est comme fig\u00e9e dans un \u00e9tat primordial depuis des milliards d\u2019ann\u00e9es&#8230; <a href=\"https:\/\/t.co\/5a3URHvZAe\">https:\/\/t.co\/5a3URHvZAe<\/a><\/p>&mdash; Trust My Science (@TrustMyScience) <a href=\"https:\/\/twitter.com\/TrustMyScience\/status\/1745828223353495794?ref_src=twsrc%5Etfw\">January 12, 2024<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Une d\u00e9couverte d\u00e9concertante<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cependant, cette classification soutient qu&#8217;une galaxie de ce type aurait au moins quelques \u00e9toiles<\/strong>, et J0613+52, apparemment sans aucune, pourrait \u00eatre quelque chose de encore plus rare et insaisissable : une galaxie sombre et primordiale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00ab Cela pourrait \u00eatre notre premi\u00e8re d\u00e9couverte d&#8217;une galaxie proche form\u00e9e de gaz primordial \u00bb, <a href=\"https:\/\/bigthink.com\/starts-with-a-bang\/dark-primordial-galaxy\/\" target=\"_blank\" rel=\"noopener nofollow\" title=\"affirme Karen O'Neil\">affirme Karen O&#8217;Neil<\/a>, scientifique de l&#8217;Observatoire de Green Bank, dans une d\u00e9claration sur la recherche.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>O&#8217;Neil et son \u00e9quipe ont d\u00e9couvert l&#8217;objet gr\u00e2ce \u00e0 une erreur fortuite commise pendant l&#8217;\u00e9tude des LSB<\/strong>. Fondamentalement, ils ont remarqu\u00e9 qu&#8217;il y avait une divergence de donn\u00e9es entre deux t\u00e9lescopes qu&#8217;ils utilisaient, ce qui les a amen\u00e9s \u00e0 v\u00e9rifier deux fois o\u00f9 ils regardaient.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"D\u00e9couverte d&#039;une galaxie sans \u00e9toiles\" width=\"840\" height=\"473\" src=\"https:\/\/www.youtube.com\/embed\/BNiU377Wj74?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u00ab Le [T\u00e9lescope de Green Bank] pointait accidentellement vers les mauvaises coordonn\u00e9es et a d\u00e9couvert cet objet \u00bb, a d\u00e9clar\u00e9 O&#8217;Neil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Non seulement ils ont d\u00e9couvert que la galaxie manquait d&#8217;\u00e9toiles malgr\u00e9 sa richesse en gaz <\/strong>&#8211; ils estiment qu&#8217;elle contient entre mille et deux mille milliards de masses solaires d&#8217;hydrog\u00e8ne -, <strong>mais elle \u00e9tait \u00e9galement extr\u00eamement isol\u00e9e.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00ab Elle est trop \u00e9loign\u00e9 des autres galaxies pour qu&#8217;elles puissent contribuer \u00e0 d\u00e9clencher la formation d&#8217;\u00e9toiles par le biais d&#8217;une rencontre \u00bb, explique O&#8217;Neil. \u00ab J0613+52 semble ne pas \u00eatre perturb\u00e9 et peu d\u00e9velopp\u00e9 \u00bb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ces derniers mots, \u00ab inalt\u00e9r\u00e9e et sous-d\u00e9velopp\u00e9e \u00bb, sont essentiels. <strong>Cela sugg\u00e8re que, tout au long des milliards d&#8217;ann\u00e9es de son existence, la galaxie \u00ab<\/strong> <strong>sombre \u00bb est rest\u00e9e stable \u00e0 un degr\u00e9 sans pr\u00e9c\u00e9dent<\/strong>, sans interactions gravitationnelles significatives qui provoquent l&#8217;agr\u00e9gation de gaz pour former des \u00e9toiles, et sans galaxies proches qui perturbent son \u00e9quilibre presque parfait.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En d&#8217;autres termes, il s&#8217;agit d&#8217;une relique incroyablement bien conserv\u00e9e des premi\u00e8res ann\u00e9es du cosmos, <strong>si parfaite qu&#8217;elle d\u00e9fie presque la compr\u00e9hension.<\/strong><\/p>\n\n\n<div class=\"sc-card-program\">\r\n  <div class=\"sc-card-program__body\">\r\n    <div class=\"sc-card-program__row clearfix\">\r\n      <div class=\"sc-card-program__col-logo\">\r\n        <img decoding=\"async\" class=\"sc-card-program__img\" src=\"https:\/\/images.sftcdn.net\/images\/t_app-icon-s\/p\/2cddcc48-a4d6-11e6-88af-00163ec9f5fa\/3678680588\/nasa-app-logo\" alt=\"Application NASA\" width=\"100px\" height=\"100px\">\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-title\">\r\n        <span class=\"sc-card-program__title\">Application NASA<\/span>\r\n        <a class=\"sc-card-program__button sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\">T\u00c9L\u00c9CHARGER<\/a>\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-rating\">\r\n        \r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <span class=\"sc-card-program__description\"><\/span>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <img decoding=\"async\" class=\"sc-card-program__bigpic\" src=\"\">\r\n    <\/div>\r\n    <a class=\"sc-card-program__link track-link sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\"><\/a>\r\n  <\/div>\r\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Les observations futures devront confirmer ces d\u00e9couvertes<\/strong>. Comme le souligne Big Think, les astronomes rechercheront des m\u00e9taux lourds qui indiquent la pr\u00e9sence d&#8217;\u00e9toiles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si aucune n&#8217;est trouv\u00e9e, cela sera une preuve convaincante que <strong>J0613+52 est vraiment la galaxie sombre qui a \u00e9chapp\u00e9 \u00e0 la d\u00e9tection pendant si longtemps.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des astronomes ont d\u00e9couvert par hasard une galaxie enti\u00e8re qui semble avoir beaucoup de gaz, mais aucune \u00e9toile visible. Comment est-ce possible ?<\/p>\n","protected":false},"author":9265,"featured_media":137182,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","wpcf-pageviews":73},"categories":[16761],"tags":[17024,17131],"usertag":[],"vertical":[],"content-category":[],"class_list":["post-137181","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-app-subdomain-redirectionnasa-app","tag-espacio"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/137181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/users\/9265"}],"replies":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/comments?post=137181"}],"version-history":[{"count":1,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/137181\/revisions"}],"predecessor-version":[{"id":161792,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/137181\/revisions\/161792"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/media\/137182"}],"wp:attachment":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/media?parent=137181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/categories?post=137181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/tags?post=137181"},{"taxonomy":"usertag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/usertag?post=137181"},{"taxonomy":"vertical","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/vertical?post=137181"},{"taxonomy":"content-category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/content-category?post=137181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}