{"id":10568,"date":"2023-12-11T18:28:21","date_gmt":"2023-12-11T18:28:21","guid":{"rendered":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/politique\/letoile-devenue-planete-diamant"},"modified":"2023-12-11T20:03:16","modified_gmt":"2023-12-11T20:03:16","slug":"letoile-devenue-planete-diamant","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant","title":{"rendered":"L\u2019\u00e9toile devenue \u201cplan\u00e8te diamant\u201d"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; S\u00e3o Tom\u00e9 e Pr\u00edncipe. <\/strong><\/span>Un gigantesque diamant de 6000 kilome\u0300tres de diame\u0300tre, dont la masse e\u0301quivaudrait a\u0300 300 fois celle de la Terre pour un diame\u0300tre cinq fois supe\u0301rieur ! Voici a\u0300 quoi ressemblerait PSR J1719-1438 b, une \u201cplane\u0300te diamant\u201d unique en son genre.<\/p>\n<p><b>Constellation du Serpent<\/b><\/p>\n<p>Elle orbite en un peu plus de deux heures autour de son e\u0301toile, a\u0300 60.000 kilome\u0300tres. Celle-ci serait un vestige d\u2019e\u0301toile massive ayant explose\u0301 en supernova, un pulsar (ou e\u0301toile a\u0300 neutrons) situe\u0301 a\u0300 4000 anne\u0301es-lumie\u0300re du Soleil, dans la constellation du Serpent. Mais la \u201cplane\u0300te diamant\u201d est-elle vraiment une plane\u0300te ?<\/p>\n<p><b>Une autre e\u0301toile ?<\/b><\/p>\n<p>Les astronomes en doutent. Ils penchent pluto\u0302t pour une autre e\u0301toile morte, qui aurait fini sa vie en ge\u0301ante rouge, puis en naine blanche. L\u2019accre\u0301tion avec son pulsar n\u2019aurait laisse\u0301 qu\u2019un c\u0153ur de naine blanche tre\u0300s dense, constitue\u0301 de noyaux de carbone et d\u2019hydroge\u0300ne sous forme cristallise\u0301e.<\/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. Un gigantesque diamant de 6000 kilome\u0300tres de diame\u0300tre, dont la masse e\u0301quivaudrait a\u0300 300 fois celle de la Terre pour un diame\u0300tre cinq fois supe\u0301rieur ! Voici a\u0300 quoi ressemblerait PSR J1719-1438 b, une \u201cplane\u0300te diamant\u201d unique en son genre. Constellation du Serpent Elle orbite en un peu plus [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":10567,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,55,56],"class_list":["post-10568","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>L\u2019\u00e9toile devenue \u201cplan\u00e8te diamant\u201d - S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/title>\n<meta name=\"description\" content=\"Un gigantesque diamant de 6000 kilome\u0300tres de diame\u0300tre, dont la masse e\u0301quivaudrait a\u0300 300 fois celle de la Terre pour ...\" \/>\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\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019\u00e9toile devenue \u201cplan\u00e8te diamant\u201d\" \/>\n<meta property=\"og:description\" content=\"Un gigantesque diamant de 6000 kilome\u0300tres de diame\u0300tre, dont la masse e\u0301quivaudrait a\u0300 300 fois celle de la Terre pour ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\" \/>\n<meta property=\"og:site_name\" content=\"S\u00e3o Tom\u00e9 e Pr\u00edncipe\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-11T18:28:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-11T20:03:16+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/sao-tome-e-principe\/sites\/59\/2023\/12\/sm_1702308746.68995.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"898\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"L\u2019\u00e9toile devenue \u201cplan\u00e8te diamant\u201d\",\"datePublished\":\"2023-12-11T18:28:21+00:00\",\"dateModified\":\"2023-12-11T20:03:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\"},\"wordCount\":199,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/sao-tome-e-principe\/sites\/59\/2023\/12\/sm_1702308746.68995.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-S\u00e3o Tom\u00e9 e Pr\u00edncipe\",\"S\u00e3o Tom\u00e9 e Pr\u00edncipe\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\",\"url\":\"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/letoile-devenue-planete-diamant\",\"name\":\"L\u2019\u00e9toile devenue \u201cplan\u00e8te diamant\u201d - 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