{"id":2173,"date":"2026-04-01T20:49:15","date_gmt":"2026-04-01T18:49:15","guid":{"rendered":"https:\/\/voyage-astrophoto.fr\/index.php\/messier\/m3\/"},"modified":"2026-04-01T20:49:15","modified_gmt":"2026-04-01T18:49:15","slug":"m3","status":"publish","type":"messier_object","link":"https:\/\/voyage-astrophoto.fr\/index.php\/messier\/m3\/","title":{"rendered":"M3 &#8211; M3"},"content":{"rendered":"<p>Premier objet d\u00e9couvert directement par Charles Messier, cet amas contient environ 500 000 \u00e9toiles.[4, 5] Il est c\u00e9l\u00e8bre pour sa population massive d\\&rsquo;\u00e9toiles variables de type RR Lyrae, permettant aux astronomes de mesurer pr\u00e9cis\u00e9ment les distances dans le halo galactique.[1] Sa moiti\u00e9 de masse est concentr\u00e9e dans un volume de seulement 22 ann\u00e9es-lumi\u00e8re de diam\u00e8tre. Il contient \u00e9galement un nombre important de \\&rsquo;tra\u00eenardes bleues\\&rsquo;, des \u00e9toiles paraissant plus jeunes que le reste de la population de l\\&rsquo;amas.[3]<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2173","messier_object","type-messier_object","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/voyage-astrophoto.fr\/index.php\/wp-json\/wp\/v2\/messier_object\/2173","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=2173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}