{"id":4828,"date":"2016-02-09T16:18:11","date_gmt":"2016-02-09T16:18:11","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4828"},"modified":"2016-02-16T14:54:14","modified_gmt":"2016-02-16T14:54:14","slug":"observez-lamas-detoiles-des-pleiades-en-debut-de-nuit","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/09\/observez-lamas-detoiles-des-pleiades-en-debut-de-nuit\/","title":{"rendered":"Observez l’amas d’\u00e9toiles des Pl\u00e9iades en d\u00e9but de nuit"},"content":{"rendered":"

Le d\u00e9but de l’ann\u00e9e est la p\u00e9riode id\u00e9ale pour observer le plus bel amas d’\u00e9toiles, celui des Pl\u00e9iades (Messier 45). Il vous attend loin des lumi\u00e8res parasites.<\/strong><\/p>\n

Vous avez devant vous une belle soir\u00e9e et vous avez envie de d\u00e9couvrir une curiosit\u00e9 c\u00e9leste ? C\u2019est le moment de profiter de l’absence de la Lune (qui va revenir en soir\u00e9e dans les jours qui viennent) pour partir \u00e0 la d\u00e9couverte d’un tr\u00e8s bel amas d’\u00e9toiles, l’amas des Pl\u00e9iades<\/a>.<\/p>\n

\"pl\u00e9iades\"<\/a><\/p>\n

Bien que l’amas se situe \u00e0 444 ann\u00e9es-lumi\u00e8re de nous dans la constellation du Taureau<\/a>, pas besoin de t\u00e9lescope ou de lunette astronomique<\/a>. Vos yeux vous suffiront pour l’admirer dans le ciel hivernal en vous aidant de la carte ci-dessous.<\/p>\n

\"stelvision\"<\/p>\n

L\u2019amas des Pl\u00e9iades<\/a> (dans la mythologie grecque, les Pl\u00e9iades \u00e9taient les sept filles d\u2019Atlas et de Pl\u00e9ion\u00e9) s\u2019\u00e9tend sur une surface apparente de 2\u00b0 dans le ciel, l\u2019\u00e9quivalent de quatre fois la Pleine Lune<\/a>.<\/p>\n

<\/p>\n

Les \u00e9toiles de l\u2019amas sont n\u00e9es ensemble il y a une centaine de millions d\u2019ann\u00e9es et certaines sont encore entour\u00e9es de n\u00e9bulosit\u00e9s qui s\u2019effilochent peu \u00e0 peu. Depuis leur naissance elles s\u2019\u00e9loignent les unes des autres ; dans 250 millions d\u2019ann\u00e9es il ne restera plus rien de l\u2019amas et les \u00e9toiles poursuivront solitairement leur \u00e9volution.<\/p>\n

L’amas des Pl\u00e9iades<\/a> est \u00e9galement appel\u00e9 Messier 45, la r\u00e9f\u00e9rence de cet objet c\u00e9leste dans le catalogue qu’a \u00e9tabli au XVIIIe si\u00e8cle l\u2019astronome fran\u00e7ais Charles Messier.<\/p>\n

\u00c0 l’\u0153il nu Messier 45 ressemble \u00e0 une petite tache laiteuse (voir l’image plus haut) constitu\u00e9e de7 \u00e9toiles brillantes qui sont\u00a0 Ast\u00e9rope, M\u00e9rope, \u00c9lectre, Ma\u00efa, Tayg\u00e8te, C\u00e9la\u00e9no et Alcyoneb. Les observateurs ayant une vue per\u00e7ante parviennent \u00e0 d\u00e9nombrer jusqu’\u00e0 12 \u00e9toiles quand ils observent sous un excellent ciel sans aucune pollution lumineuse<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le d\u00e9but de l’ann\u00e9e est la p\u00e9riode id\u00e9ale pour observer le plus bel amas d’\u00e9toiles, celui des Pl\u00e9iades (Messier 45). Il vous attend loin des lumi\u00e8res parasites. Vous avez devant vous une belle soir\u00e9e et vous avez envie de d\u00e9couvrir une curiosit\u00e9 c\u00e9leste ? C\u2019est le moment de profiter de l’absence de la Lune (qui … Continuer la lecture de Observez l’amas d’\u00e9toiles des Pl\u00e9iades en d\u00e9but de nuit<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":4829,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[713,133,132,437,167],"class_list":["post-4828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-amas-des-pleiades","tag-charles-messier","tag-constellation-du-taureau","tag-messier-45","tag-pollution-lumineuse"],"yoast_head":"\nObservez l'amas d'\u00e9toiles des Pl\u00e9iades en d\u00e9but de nuit<\/title>\n<meta name=\"description\" content=\"Le d\u00e9but de l'ann\u00e9e est la p\u00e9riode id\u00e9ale pour observer le plus bel amas d'\u00e9toiles, celui des Pl\u00e9iades. 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