{"id":134536,"date":"2023-06-20T06:07:19","date_gmt":"2023-06-20T10:07:19","guid":{"rendered":"https:\/\/sftarticles.wpenginepowered.com\/es\/?p=294400"},"modified":"2025-06-12T11:14:33","modified_gmt":"2025-06-12T10:14:33","slug":"saviez-vous-que-les-galaxies-sont-plus-ecologiques-que-vous","status":"publish","type":"post","link":"https:\/\/cms-articles.softonic.io\/fr\/saviez-vous-que-les-galaxies-sont-plus-ecologiques-que-vous\/","title":{"rendered":"Recyclage stellaire : un ph\u00e9nom\u00e8ne \u00e9tonnant dans l&#8217;espace lointain"},"content":{"rendered":"\n<p>Sur Terre, les panneaux de recyclage sont partout, nous exhortant \u00e0 sauver notre plan\u00e8te pendant que nous le pouvons. Dans l&#8217;espace, certaines galaxies semblent se recycler sans avoir besoin de rappels sous forme de signes.<\/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\u00e9l\u00e9charger<\/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>Au moins une galaxie ne laisse pas les mat\u00e9riaux qui pourraient former des \u00e9toiles potentielles se perdre.<\/p>\n\n\n\n<p>Une \u00e9quipe internationale de scientifiques dirig\u00e9e par les astronomes Shiwu Zhang et Zheng Cai de l&#8217;Universit\u00e9 de Tsinghua (Chine) a trouv\u00e9 des preuves qu&#8217;une galaxie massive situ\u00e9e dans une n\u00e9buleuse encore plus grande appel\u00e9e MAMMOTH-1 extrait de la mati\u00e8re de son environnement pour donner naissance \u00e0 de nouvelles \u00e9toiles.<\/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=\"en\" dir=\"ltr\">Aging stars pollute their surroundings as they burn, but galaxies recycle! \u267b\ufe0f The cloud of dust and gas surrounding a galaxy absorbs byproducts and pushes them back in, fueling the formation of new stars. About the process &amp; a mission set to observe it: <a href=\"https:\/\/t.co\/zUgBbrCS7H\">https:\/\/t.co\/zUgBbrCS7H<\/a> <a href=\"https:\/\/t.co\/ltZa1zimHe\">pic.twitter.com\/ltZa1zimHe<\/a><\/p>&mdash; NASA (@NASA) <a href=\"https:\/\/twitter.com\/NASA\/status\/1187846454204870661?ref_src=twsrc%5Etfw\">October 25, 2019<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p>Cependant, ce mat\u00e9riau contient des \u00e9l\u00e9ments form\u00e9s par des supernovas pass\u00e9es, cens\u00e9es s&#8217;\u00eatre produites dans des galaxies, leurs restes \u00e9tant \u00e9ject\u00e9s dans la n\u00e9buleuse par le trou noir central de la galaxie.<\/p>\n\n\n\n<p>Cela signifie que la galaxie, appel\u00e9e G-2 par l&#8217;\u00e9quipe de recherche, forme des \u00e9toiles \u00e0 partir de mat\u00e9riaux qui avaient \u00e9t\u00e9 pr\u00e9c\u00e9demment expuls\u00e9s dans l&#8217;espace intergalactique par une galaxie, qu&#8217;elle soit elle-m\u00eame ou une autre galaxie proche.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-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=\"NASA - Hubble telescope captured galaxies the Universe - 4K Ultra HD\" width=\"840\" height=\"473\" src=\"https:\/\/www.youtube.com\/embed\/UtAhaXeAEQw?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<h2 class=\"wp-block-heading\">Recyclage stellaire<\/h2>\n\n\n\n<p>Les \u00e9toiles tirent leur \u00e9nergie du processus de fusion nucl\u00e9aire, o\u00f9 les atomes d&#8217;hydrog\u00e8ne se combinent pour former de l&#8217;h\u00e9lium. Seules les \u00e9toiles massives (8 masses solaires ou plus) deviennent des supernovas apr\u00e8s avoir fusionn\u00e9 tout leur hydrog\u00e8ne en h\u00e9lium.<\/p>\n\n\n\n<p>La gravit\u00e9 provoque alors l&#8217;effondrement d&#8217;une \u00e9toile massive, qui finit par exploser dans un \u00e9v\u00e9nement extr\u00eamement lumineux qui emporte ses couches externes.<\/p>\n\n\n\n<p>Les supernovas cr\u00e9ent des ondes de choc qui peuvent g\u00e9n\u00e9rer suffisamment d&#8217;\u00e9nergie pour fusionner de nouveaux noyaux atomiques, y compris des m\u00e9taux comme le fer.<\/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=\"en\" dir=\"ltr\">Even galaxies recycle <a href=\"https:\/\/t.co\/O0T8r90T0L\">https:\/\/t.co\/O0T8r90T0L<\/a><\/p>&mdash; Jennifer Ouellette (@JenLucPiquant) <a href=\"https:\/\/twitter.com\/JenLucPiquant\/status\/1670832729137504259?ref_src=twsrc%5Etfw\">June 19, 2023<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p>Mais la vie apr\u00e8s la mort d&#8217;une \u00e9toile peut signifier la naissance d&#8217;une autre. Apr\u00e8s l&#8217;explosion, les restes de l&#8217;\u00e9toile morte se dispersent dans l&#8217;espace, tourbillonnant dans le milieu interstellaire.<\/p>\n\n\n\n<p>Bien qu&#8217;une partie de ce mat\u00e9riau soit perdue \u00e0 jamais dans l&#8217;espace, les \u00e9toiles peuvent encore potentiellement incorporer une partie du mat\u00e9riau cr\u00e9\u00e9 dans la supernova. Oui, les galaxies se recyclent pour continuer \u00e0 cr\u00e9er de nouveaux corps c\u00e9lestes.<\/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\u00e9l\u00e9charger<\/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><em>Certains des liens ajout\u00e9s dans l&#8217;article font partie de campagnes d&#8217;affiliation et peuvent repr\u00e9senter des avantages pour Softonic.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cela ressemble \u00e0 une blague, mais c&#8217;est vrai : les galaxies recyclent plus que beaucoup d&#8217;humains et sans qu&#8217;il soit n\u00e9cessaire de le leur rappeler. Ce recyclage est naturel.<\/p>\n","protected":false},"author":9265,"featured_media":235864,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","wpcf-pageviews":0},"categories":[16761],"tags":[],"usertag":[],"vertical":[],"content-category":[],"class_list":["post-134536","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134536","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=134536"}],"version-history":[{"count":1,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134536\/revisions"}],"predecessor-version":[{"id":162015,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134536\/revisions\/162015"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/media?parent=134536"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/categories?post=134536"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/tags?post=134536"},{"taxonomy":"usertag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/usertag?post=134536"},{"taxonomy":"vertical","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/vertical?post=134536"},{"taxonomy":"content-category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/content-category?post=134536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}