{"id":589890,"date":"2025-12-10T04:24:15","date_gmt":"2025-12-10T04:24:15","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/589890\/"},"modified":"2025-12-10T04:24:15","modified_gmt":"2025-12-10T04:24:15","slug":"les-astronomes-detectent-en-direct-une-explosion-detoile-survenue-il-y-a-plus-de-13-milliards-dannees","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/589890\/","title":{"rendered":"Les astronomes d\u00e9tectent en direct une explosion d\u2019\u00e9toile survenue il y a plus de 13\u00a0milliards d\u2019ann\u00e9es"},"content":{"rendered":"

\n D\u00c9CRYPTAGE – <\/strong>C\u2019est un record absolu, permis par l\u2019association du t\u00e9lescope spatial franco-chinois SVOM, qui a donn\u00e9 l\u2019alerte, et du James Webb, qui a pu confirmer la nature de l\u2019\u00e9v\u00e9nement trois mois plus tard.<\/p>\n

Peut-on vraiment se rendre compte de l\u2019exploit qui vient d\u2019\u00eatre r\u00e9alis\u00e9\u00a0? Une \u00e9quipe d\u2019astronomes a observ\u00e9 la plus lointaine supernova jamais enregistr\u00e9e. Cette explosion d\u2019\u00e9toile s\u2019est produite il y a plus de 13\u00a0milliards d\u2019ann\u00e9es, quand notre univers n\u2019avait que 5\u00a0% de son \u00e2ge actuel. La lumi\u00e8re de l\u2019\u00e9v\u00e9nement cataclysmique a mis tout ce temps \u00e0 nous parvenir, parcourant une distance proprement astronomique. Elle pulv\u00e9rise le record pr\u00e9c\u00e9dent, \u00e9tabli en 2024 par le t\u00e9lescope spatial James Webb (JWST), de plus de 1 milliard d\u2019ann\u00e9es. Il aura fallu, pour remonter le film de ce \u00ab\u00a0cold case\u00a0\u00bb cosmique, utiliser toute une s\u00e9rie d\u2019instruments pouss\u00e9s aux limites de leurs performances et une incroyable cha\u00eene de coordination des observations.<\/p>\n

Tout d\u00e9marre le 14\u00a0mars 2025, lorsque le t\u00e9lescope spatial franco-chinois SVOM<\/a>, lanc\u00e9 l\u2019\u00e9t\u00e9 pr\u00e9c\u00e9dent, d\u00e9tecte un sursaut gamma (GRB 250314A). L\u2019\u00e9v\u00e9nement en soi, qui dure onze\u00a0secondes, n\u2019est pas si rare. L\u2019instrument \u00e0 champ large du satellite\u2026<\/p>\n

\n Cet article est r\u00e9serv\u00e9 aux abonn\u00e9s. Il vous reste 85% \u00e0 d\u00e9couvrir.\n <\/p>\n

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\n <\/a>\n <\/p>\n","protected":false},"excerpt":{"rendered":"D\u00c9CRYPTAGE – C\u2019est un record absolu, permis par l\u2019association du t\u00e9lescope spatial franco-chinois SVOM, qui a donn\u00e9 l\u2019alerte,…\n","protected":false},"author":2,"featured_media":589891,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[48,1011,27,43,40,41,39,42,44],"class_list":{"0":"post-589890","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sciences-et-technologies","8":"tag-astronomie","9":"tag-fr","10":"tag-france","11":"tag-science","12":"tag-science-and-technology","13":"tag-sciences","14":"tag-sciences-et-technologies","15":"tag-technologies","16":"tag-technology"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fr\/115693372354733079","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/589890","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/comments?post=589890"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/589890\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media\/589891"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media?parent=589890"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/categories?post=589890"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/tags?post=589890"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}