{"id":10858,"date":"2023-12-24T19:36:28","date_gmt":"2023-12-24T19:36:28","guid":{"rendered":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/politique\/naines-noires-celles-quon-ne-verra-jamais"},"modified":"2023-12-24T23:02:46","modified_gmt":"2023-12-24T23:02:46","slug":"naines-noires-celles-quon-ne-verra-jamais","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/naines-noires-celles-quon-ne-verra-jamais","title":{"rendered":"Naines noires, celles qu\u2019on ne verra jamais"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; S\u00e3o Tom\u00e9 e Pr\u00edncipe. <\/strong><\/span>Malgre\u0301 ses 13,8 milliards d\u2019anne\u0301es, l\u2019Univers n\u2019a pas eu le temps de former une seule naine noire. Un reste stellaire qui est l\u2019e\u0301tape ultime (et the\u0301orique) de l\u2019e\u0301volution d\u2019une 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\u2019une tempe\u0301rature initiale pouvant atteindre 100.000 kelvins et dont la faible surface fait qu\u2019il va mettre tre\u0300s longtemps a\u0300 se refroidir. Probablement des dizaines de millions de milliards d\u2019anne\u0301es ! Voire beaucoup plus.<\/p>\n<p><b>Une sphe\u0300re noire quasi inde\u0301tectable<\/b><\/p>\n<p>L\u2019incertitude domine tant son e\u0301volution touche a\u0300 des questions fondamentales \u2013 tels la dure\u0301e de vie du proton ou les sce\u0301narios de fin de l\u2019Univers -, encore irre\u0301solues. Une fois froide, il ne restera plus qu\u2019une 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><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/sao-tome-e-principe\">S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; S\u00e3o Tom\u00e9 e Pr\u00edncipe. Malgre\u0301 ses 13,8 milliards d\u2019anne\u0301es, l\u2019Univers n\u2019a pas eu le temps de former une seule naine noire. Un reste stellaire qui est l\u2019e\u0301tape ultime (et the\u0301orique) de l\u2019e\u0301volution d\u2019une e\u0301toile peu massive comme le Soleil. Avant, elle sera passe\u0301e par le stade de ge\u0301ante rouge puis de naine blanche [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":10857,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,55,56],"class_list":["post-10858","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-sao-tome-e-principe","tag-sao-tome-e-principe"],"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\u2019on ne verra jamais - S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/title>\n<meta name=\"description\" content=\"Malgre\u0301 ses 13,8 milliards d\u2019anne\u0301es, l\u2019Univers n\u2019a pas eu le temps de former une seule naine noire. 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