{"id":2971,"date":"2015-06-12T04:48:51","date_gmt":"2015-06-12T04:48:51","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2971"},"modified":"2015-06-13T04:36:25","modified_gmt":"2015-06-13T04:36:25","slug":"ce-soir-venus-sapproche-de-lamas-de-la-creche","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/12\/ce-soir-venus-sapproche-de-lamas-de-la-creche\/","title":{"rendered":"Ce soir V\u00e9nus s’approche de l’amas de la Cr\u00e8che"},"content":{"rendered":"

V\u00e9nus, la plus brillante plan\u00e8te du Syst\u00e8me solaire, sera ce soir \u00e0 moins de 1\u00b0 de Messier 44, le c\u00e9l\u00e8bre amas de la Cr\u00e8che dans la constellation du Cancer.<\/strong><\/p>\n

C’est \u00e0 un nouveau rendez-vous c\u00e9leste que nous convie l’\u00e9clatante V\u00e9nus <\/a>(magnitude -4)\u00a0: vers 23 h (heure locale), lorsque le ciel sera assez sombre, vous retrouverez la seconde plan\u00e8te du Syst\u00e8me solaire juste \u00e0 c\u00f4t\u00e9 de l’amas de la Cr\u00e8che<\/a>, au-dessus de l’horizon ouest.<\/p>\n

\"venus_amascreche\"<\/a><\/p>\n

Depuis le d\u00e9but de l’ann\u00e9e V\u00e9nus remonte dans le ciel le long de l’\u00e9cliptique, ce qui lui donne l’occasion de croiser au plus pr\u00e8s de nombreux astres\u00a0: ce fut d’abord Mercure <\/a>en janvier, puis la Plan\u00e8te rouge<\/a> en f\u00e9vrier, Uranus <\/a>au mois de mars, l’amas d’\u00e9toiles des Pl\u00e9iades <\/a>en avril et enfin Messier 35<\/a> courant mai.<\/p>\n

Ce soir c’est au tour de Messier 44, l’amas de la Cr\u00e8che, de recevoir la visite de V\u00e9nus, plus d’un mois apr\u00e8s celle de Jupiter<\/a>.<\/p>\n

Le montage ci-dessus repr\u00e9sente le champ stellaire que vous verrez dans une paire de jumelles ou une petite lunette astronomique<\/a>, mais les observateurs install\u00e9s loin de toute pollution lumineuse<\/a> devineront sans peine l’amas de la Cr\u00e8che \u00e0 l’\u0153il nu (sa magnitude moyenne est estim\u00e9e \u00e0 3,7).<\/p>\n

V\u00e9nus va ensuite s’\u00e9loigner de l’amas mais nous promet d’autres belles rencontres\u00a0: les 19 et 20 juin ce sera avec le croissant de Lune et Jupiter, et 10 jours plus tard Jupiter et V\u00e9nus<\/a> ne seront plus qu’\u00e0 22 minutes d’arc l’une de l’autre.<\/p>\n

Je vous rappelle que tous ces rapprochements ne sont qu’apparents\u00a0: si nous voyons depuis notre observatoire terrestre des astres serr\u00e9s l’un contre l’autre c’est qu’ils sont dans la m\u00eame direction, mais la distance qui les s\u00e9pare est \u00e9norme\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"

V\u00e9nus, la plus brillante plan\u00e8te du Syst\u00e8me solaire, sera ce soir \u00e0 moins de 1\u00b0 de Messier 44, le c\u00e9l\u00e8bre amas de la Cr\u00e8che dans la constellation du Cancer. C’est \u00e0 un nouveau rendez-vous c\u00e9leste que nous convie l’\u00e9clatante V\u00e9nus (magnitude -4)\u00a0: vers 23 h (heure locale), lorsque le ciel sera assez sombre, vous retrouverez … Continuer la lecture de Ce soir V\u00e9nus s’approche de l’amas de la Cr\u00e8che<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":2972,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[434,438,433,114,159],"class_list":["post-2971","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-amas-de-la-creche","tag-constellation-du-cancer","tag-messier-44","tag-planete","tag-venus"],"yoast_head":"\nCe soir V\u00e9nus s'approche de l'amas de la Cr\u00e8che<\/title>\n<meta name=\"description\" content=\"V\u00e9nus, la plus brillante plan\u00e8te du Syst\u00e8me solaire, sera ce soir 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