{"id":2173,"date":"2019-11-13T20:37:00","date_gmt":"2019-11-13T19:37:00","guid":{"rendered":"http:\/\/astroaspach.fr\/astroaspachV2\/?p=2173"},"modified":"2020-11-13T20:39:21","modified_gmt":"2020-11-13T19:39:21","slug":"mercure-et-la-relativite-generale","status":"publish","type":"post","link":"http:\/\/astroaspach.fr\/astroaspachV2\/2019\/11\/13\/mercure-et-la-relativite-generale\/","title":{"rendered":"Mercure et la relativit\u00e9 g\u00e9n\u00e9rale"},"content":{"rendered":"<p><a href=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/11\/184px-Perihelion_precession.svg_.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2172\" src=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/11\/184px-Perihelion_precession.svg_.png\" alt=\"\" width=\"250\" height=\"231\" \/><\/a>Mercure, comme toutes les plan\u00e8tes, se d\u00e9place sur une orbite elliptique autour du soleil, le soleil occupant l&rsquo;un des foyers de l&rsquo;ellipse. Et cette ellipse tourne avec le temps, c&rsquo;est un ph\u00e9nom\u00e8ne de pr\u00e9cession. Avec la th\u00e9orie de Newton, il est possible de calculer cette pr\u00e9cession, et c&rsquo;est Urbain Le Verrier qui montre en 1859, que pour Mercure, la valeur th\u00e9orique calcul\u00e9e est diff\u00e9rente de celle que l&rsquo;on observe.<\/p>\n<p>Plusieurs hypoth\u00e8ses se pr\u00e9sentent alors :<\/p>\n<ul>\n<li>une plan\u00e8te non encore observ\u00e9e orbite entre le Soleil et Mercure, qui modifierait la trajectoire de Mercure<\/li>\n<li>V\u00e9nus a une masse diff\u00e9rente de celle que l&rsquo;on pense<\/li>\n<\/ul>\n<p>et quelques autres encore. Mais la vraie explication est donn\u00e9e par Albert Einstein en 1915, avec la th\u00e9orie de la relativit\u00e9 g\u00e9n\u00e9rale. En faisant les calculs avec cette th\u00e9orie, le r\u00e9sultat est tout \u00e0 fait concordant avec l&rsquo;observation.<\/p>\n<p>C&rsquo;est la premi\u00e8re confirmation de la validit\u00e9 de la relativit\u00e9 g\u00e9n\u00e9rale ! Une exp\u00e9rience lors d&rsquo;une \u00e9clipse de soleil en 1919 sera la deuxi\u00e8me confirmation de la validit\u00e9 de cette th\u00e9orie.<\/p>\n<p>cr\u00e9dit image : <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Perihelion_precession.svg\" target=\"_blank\" rel=\"noopener noreferrer\">Wikimedia Commons<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/11\/184px-Perihelion_precession.svg_.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2172\" src=\"http:\/\/astroaspach.fr\/astroaspachV2\/wp-content\/uploads\/2020\/11\/184px-Perihelion_precession.svg_.png\" alt=\"\" width=\"100\" height=\"92\" \/><\/a><br \/>\n&nbsp;<br \/>\nUne plan\u00e8te qui orbite entre le Soleil et Mercure ?<br \/>\n&nbsp;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-2173","post","type-post","status-publish","format-standard","hentry","category-raconter-le-ciel"],"_links":{"self":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/comments?post=2173"}],"version-history":[{"count":9,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2173\/revisions"}],"predecessor-version":[{"id":2182,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/posts\/2173\/revisions\/2182"}],"wp:attachment":[{"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/media?parent=2173"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/categories?post=2173"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/astroaspach.fr\/astroaspachV2\/wp-json\/wp\/v2\/tags?post=2173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}