{"id":2817,"date":"2026-05-28T19:23:08","date_gmt":"2026-05-28T17:23:08","guid":{"rendered":"http:\/\/localhost\/messier\/m103"},"modified":"2026-06-16T11:44:17","modified_gmt":"2026-06-16T09:44:17","slug":"m103-2","status":"publish","type":"messier_object","link":"https:\/\/voyage-astrophoto.fr\/index.php\/messier\/m103-2\/","title":{"rendered":"M103 &#8211; Amas Ouvert M103"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">M103 est le dernier objet catalogu\u00e9 par Charles Messier lui-m\u00eame, le 25 mars 1781. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cet amas ouvert est situ\u00e9 \u00e0 environ 10 000 ann\u00e9es-lumi\u00e8re de la Terre, dans la constellation de Cassiop\u00e9e. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il contient environ 40 \u00e9toiles sur un diam\u00e8tre d&rsquo;environ 20 ann\u00e9es-lumi\u00e8re, bien que son statut d&rsquo;amas v\u00e9ritable ait \u00e9t\u00e9 d\u00e9battu. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M103 est l&rsquo;un des amas ouverts les plus lointains du catalogue Messier. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L&rsquo;\u00e9toile la plus brillante de l&rsquo;amas est Struve 131, une \u00e9toile double bleue qui domine le centre de l&rsquo;amas. L&rsquo;amas est relativement jeune, avec un \u00e2ge estim\u00e9 entre 15 et 25 millions d&rsquo;ann\u00e9es. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il est observable avec des jumelles et r\u00e9v\u00e8le sa structure dans des t\u00e9lescopes d&rsquo;ouverture mod\u00e9r\u00e9e. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Sources: SEDS Messier Database, Wikipedia, NASA.<\/em><\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2817","messier_object","type-messier_object","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/voyage-astrophoto.fr\/index.php\/wp-json\/wp\/v2\/messier_object\/2817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/voyage-astrophoto.fr\/index.php\/wp-json\/wp\/v2\/messier_object"}],"about":[{"href":"https:\/\/voyage-astrophoto.fr\/index.php\/wp-json\/wp\/v2\/types\/messier_object"}],"wp:attachment":[{"href":"https:\/\/voyage-astrophoto.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}