{"id":6257,"date":"2022-05-14T18:25:00","date_gmt":"2022-05-14T18:25:00","guid":{"rendered":"https:\/\/www.africa-press.net\/madagascar\/politique\/le-trou-noir-central-de-la-voie-lactee-enfin-revele"},"modified":"2022-05-14T18:41:01","modified_gmt":"2022-05-14T18:41:01","slug":"le-trou-noir-central-de-la-voie-lactee-enfin-revele","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele","title":{"rendered":"Le trou noir central de la Voie lact\u00e9e enfin r\u00e9v\u00e9l\u00e9"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Madagascar. <\/strong><\/span>La premi\u00e8re image de ce monstre cosmique tapi au c\u0153ur de notre galaxie a \u00e9t\u00e9 obtenue \u00e0 partir d\u2019un long traitement de donn\u00e9es recueillies en 2017 par un consortium international d\u2019observatoires.<\/p>\n<p>Comme un espion d\u00e9masqu\u00e9, celui qui n\u2019\u00e9tait qu\u2019un nom de code \u2013 Sagittarius A* \u2013 a d\u00e9sormais un \u00ab visage \u00bb. Jeudi 12 mai, le consortium scientifique Event Horizon Telescope (EHT), qui regroupe plus de 300 chercheurs de par le monde, a, en effet, d\u00e9voil\u00e9 la photo d\u2019un tr\u00e8s discret, voire invisible, personnage, le trou noir g\u00e9ant qui tr\u00f4ne au centre de notre galaxie, la Voie lact\u00e9e.<\/p>\n<p>Sur l\u2019image, le minois du dr\u00f4le est un peu flou : un disque orang\u00e9 avec des zones plus claires, presque blanches, et, au milieu, une tache sombre. Cette ombre, c\u2019est Sagittarius A*, qui tient son nom de la constellation du Sagittaire dont il est la plus brillante source en ondes radio (d\u2019o\u00f9 le A, premi\u00e8re lettre de l\u2019alphabet).<\/p>\n<p>Par d\u00e9finition, un trou noir est un corps si dense que son champ gravitationnel ram\u00e8ne tout \u00e0 lui, y compris la lumi\u00e8re qui ne peut s\u2019en \u00e9chapper. Sur un clich\u00e9, on ne peut donc le \u00ab voir \u00bb qu\u2019en ombres chinoises, par contraste sur un fond lumineux, celui du disque de gaz et de poussi\u00e8res qui, gravitant autour de lui \u00e0 une vitesse folle, est chauff\u00e9 \u00e0 blanc.<\/p>\n<p>Lire aussi Article r\u00e9serv\u00e9 \u00e0 nos abonn\u00e9s La premi\u00e8re photo d\u2019un trou noir publi\u00e9e par un consortium scientifique international<\/p>\n<p>Reconnaissons-le, l\u2019image a un air de d\u00e9j\u00e0-vu. En avril 2019, le m\u00eame consortium avait d\u00e9j\u00e0 fait sensation en publiant la premi\u00e8re photo d\u2019un trou noir, celui de la galaxie M87. M\u00eame anneau lumineux, m\u00eame flaque obscure au centre. \u00ab Le r\u00e9sultat est peut-\u00eatre un peu d\u00e9cevant parce que les deux images se ressemblent \u00e9norm\u00e9ment, conc\u00e8de Fr\u00e9d\u00e9ric Gueth, directeur adjoint de l\u2019Institut de radioastronomie millim\u00e9trique (IRAM), organisme fond\u00e9 par le CNRS et l\u2019Institut Max-Planck pour l\u2019astronomie qui fait partie de l\u2019EHT. Mais, en r\u00e9alit\u00e9, c\u2019est un r\u00e9sultat tr\u00e8s int\u00e9ressant qui montre deux choses. Tout d\u2019abord, c\u2019est une confirmation de la premi\u00e8re observation, qui n\u2019\u00e9tait pas due \u00e0 une erreur cach\u00e9e pass\u00e9e inaper\u00e7ue. \u00bb<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/madagascar\">Madagascar<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Madagascar. La premi\u00e8re image de ce monstre cosmique tapi au c\u0153ur de notre galaxie a \u00e9t\u00e9 obtenue \u00e0 partir d\u2019un long traitement de donn\u00e9es recueillies en 2017 par un consortium international d\u2019observatoires. Comme un espion d\u00e9masqu\u00e9, celui qui n\u2019\u00e9tait qu\u2019un nom de code \u2013 Sagittarius A* \u2013 a d\u00e9sormais un \u00ab visage \u00bb. [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":6256,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[36,50,49],"class_list":["post-6257","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-madagascar","tag-madagascar"],"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>Le trou noir central de la Voie lact\u00e9e enfin r\u00e9v\u00e9l\u00e9 - Madagascar<\/title>\n<meta name=\"description\" content=\"La premi\u00e8re image de ce monstre cosmique tapi au c\u0153ur de notre galaxie a \u00e9t\u00e9 obtenue \u00e0 partir d\u2019un long traitement de do ...\" \/>\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\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le trou noir central de la Voie lact\u00e9e enfin r\u00e9v\u00e9l\u00e9\" \/>\n<meta property=\"og:description\" content=\"La premi\u00e8re image de ce monstre cosmique tapi au c\u0153ur de notre galaxie a \u00e9t\u00e9 obtenue \u00e0 partir d\u2019un long traitement de do ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\" \/>\n<meta property=\"og:site_name\" content=\"Madagascar\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-14T18:25:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-05-14T18:41:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2022\/05\/postQueueImg_12-627ff7a6acfea.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1328\" \/>\n\t<meta property=\"og:image:height\" content=\"1328\" \/>\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=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Le trou noir central de la Voie lact\u00e9e enfin r\u00e9v\u00e9l\u00e9\",\"datePublished\":\"2022-05-14T18:25:00+00:00\",\"dateModified\":\"2022-05-14T18:41:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\"},\"wordCount\":429,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/madagascar\/sites\/56\/2022\/05\/postQueueImg_12-627ff7a6acfea.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Madagascar\",\"Madagascar\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\",\"url\":\"https:\/\/www.africa-press.net\/madagascar\/toutes-les-actualites\/le-trou-noir-central-de-la-voie-lactee-enfin-revele\",\"name\":\"Le trou noir central de la Voie lact\u00e9e enfin r\u00e9v\u00e9l\u00e9 - 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