{"id":104647,"date":"2026-04-26T12:31:37","date_gmt":"2026-04-26T12:31:37","guid":{"rendered":"https:\/\/www.africa-press.net\/cameroun\/politique\/naines-noires-celles-quon-ne-verra-jamais"},"modified":"2026-04-26T12:31:37","modified_gmt":"2026-04-26T12:31:37","slug":"naines-noires-celles-quon-ne-verra-jamais","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cameroun\/toutes-les-actualites\/naines-noires-celles-quon-ne-verra-jamais","title":{"rendered":"Naines noires, celles qu&rsquo;on ne verra jamais"},"content":{"rendered":"<p><span class=\"ap-article-header-tag\">           <strong>Africa-Press &#8211; Cameroun. <\/strong>         <\/span>Trop jeune. Malgre\u0301 ses 13,8 milliards d&rsquo;anne\u0301es, l&rsquo;Univers n&rsquo;a pas eu le temps de former une seule naine noire. Un reste stellaire qui est l&rsquo;e\u0301tape ultime (et the\u0301orique) de l&rsquo;e\u0301volution d&rsquo;une e\u0301toile peu massive comme le Soleil. Avant, elle sera passe\u0301e par le stade de ge\u0301ante rouge puis de naine blanche: un objet chaud d&rsquo;une tempe\u0301rature initiale pouvant atteindre 100.000 kelvins et dont la faible surface fait qu&rsquo;il va mettre tre\u0300s longtemps a\u0300 se refroidir. Probablement des dizaines de millions de milliards d&rsquo;anne\u0301es ! Voire beaucoup plus.<\/p>\n<p><b>Une sphe\u0300re noire quasi inde\u0301tectable<\/b><\/p>\n<p>L&rsquo;incertitude domine tant son e\u0301volution touche a\u0300 des questions fondamentales &#8211; tels la dure\u0301e de vie du proton ou les sce\u0301narios de fin de l&rsquo;Univers -, encore irre\u0301solues. Une fois froide, il ne restera plus qu&rsquo;une sphe\u0300re noire quasi inde\u0301tectable hormis par son influence gravitationnelle. Un tour de passe-passe quantique pourrait toutefois enclencher une nouvelle fusion engendrant une supernova noire, mais cela ne se produira pas avant 101100 anne\u0301es&#8230;<\/p>\n<p class=\"ap-article-footer-note\">           Retrouvez plus d\u2019actualit\u00e9s et d\u2019analyses sur           <span class=\"ap-highlight-country\">Cameroun<\/span>           sur le site           <span class=\"ap-highlight-brand\">Africa Press<\/span>         <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Cameroun. Trop jeune. Malgre\u0301 ses 13,8 milliards d&rsquo;anne\u0301es, l&rsquo;Univers n&rsquo;a pas eu le temps de former une seule naine noire. Un reste stellaire qui est l&rsquo;e\u0301tape ultime (et the\u0301orique) de l&rsquo;e\u0301volution d&rsquo;une e\u0301toile peu massive comme le Soleil. Avant, elle sera passe\u0301e par le stade de ge\u0301ante rouge puis de naine blanche: un [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":104646,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[49],"class_list":["post-104647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-cameroun"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Naines noires, celles qu&#039;on ne verra jamais - Cameroun<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/cameroun\/politique\/naines-noires-celles-quon-ne-verra-jamais\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Naines noires, celles qu&#039;on ne verra jamais\" \/>\n<meta property=\"og:description\" content=\"Africa-Press &#8211; Cameroun. Trop jeune. Malgre\u0301 ses 13,8 milliards d&rsquo;anne\u0301es, l&rsquo;Univers n&rsquo;a pas eu le temps de former une seule naine noire. Un reste stellaire qui est l&rsquo;e\u0301tape ultime (et the\u0301orique) de l&rsquo;e\u0301volution d&rsquo;une e\u0301toile peu massive comme le Soleil. 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