{"id":2038,"date":"2023-10-09T18:43:35","date_gmt":"2023-10-09T16:43:35","guid":{"rendered":"http:\/\/vega78astronomie.fr\/?p=2038"},"modified":"2023-10-09T18:45:12","modified_gmt":"2023-10-09T16:45:12","slug":"le-quasar-ton618","status":"publish","type":"post","link":"https:\/\/vega78astronomie.fr\/index.php\/2023\/10\/09\/le-quasar-ton618\/","title":{"rendered":"Le quasar TON618"},"content":{"rendered":"\n<p>L&rsquo;image n&rsquo;a rien de somptueux mais le petit point rep\u00e9r\u00e9 TON618 est un quasar dont la lumi\u00e8re a mis 10,8 milliards d&rsquo;ann\u00e9es \u00e0 nous parvenir et qui, compte tenu de l&rsquo;expansion de l&rsquo;univers pendant tout ce temps, se situe actuellement \u00e0 environ 18 milliards d&rsquo;ann\u00e9es-lumi\u00e8re de nous ! Il est situ\u00e9 dans la constellation des Chiens de Chasse.<br>\u00ab\u00a0Quasar\u00a0\u00bb est l&rsquo;acronyme de \u00ab\u00a0quasi-stellar astronomical radiosource\u00a0\u00bb : c&rsquo;est la r\u00e9gion compacte entourant un trou noir super massif au centre de certaines galaxies, et qui \u00e9met de gigantesques quantit\u00e9s d&rsquo;\u00e9nergie depuis les ondes radio jusqu&rsquo;aux rayons gamma.<br><br>La masse du trou noir de TON618 est estim\u00e9e \u00e0 66 milliards de masses solaires : c&rsquo;est \u00e0 ce jour le plus grand trou noir d\u00e9tect\u00e9 et confirm\u00e9 dans l&rsquo;univers. <br>TON618 brille comme 140 000 milliards de soleils, soit 700 fois plus que la Voie Lact\u00e9e, et cela dans un espace 50 fois plus petit que notre galaxie !<br><br>Sur la photo ci-dessous, les galaxies sont l\u00e9gend\u00e9es en rouge, les \u00e9toiles en jaune orang\u00e9.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"http:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"http:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-1024x768.jpg\" alt=\"\" class=\"wp-image-2039\" srcset=\"https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-1024x768.jpg 1024w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-300x225.jpg 300w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-768x576.jpg 768w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-1536x1152.jpg 1536w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-2048x1536.jpg 2048w, https:\/\/vega78astronomie.fr\/wp-content\/uploads\/2023\/10\/TON618-20230717-legende-200x150.jpg 200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\"><em>Photo Philippe Karnauch, prise avec un eVscope2<\/em><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;image n&rsquo;a rien de somptueux mais le petit point rep\u00e9r\u00e9 TON618 est un quasar dont la lumi\u00e8re a mis 10,8 milliards d&rsquo;ann\u00e9es \u00e0 nous parvenir et qui, compte tenu de l&rsquo;expansion de l&rsquo;univers pendant tout ce temps, se situe actuellement \u00e0 environ 18 milliards d&rsquo;ann\u00e9es-lumi\u00e8re de nous ! Il est situ\u00e9 dans la constellation des [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[61,62],"class_list":["post-2038","post","type-post","status-publish","format-standard","hentry","category-ciel-profond","tag-quasar","tag-ton618"],"_links":{"self":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/comments?post=2038"}],"version-history":[{"count":2,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2038\/revisions"}],"predecessor-version":[{"id":2041,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/posts\/2038\/revisions\/2041"}],"wp:attachment":[{"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/categories?post=2038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vega78astronomie.fr\/index.php\/wp-json\/wp\/v2\/tags?post=2038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}