{"id":931,"date":"2014-10-03T12:41:50","date_gmt":"2014-10-03T12:41:50","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=931"},"modified":"2014-10-17T11:32:40","modified_gmt":"2014-10-17T11:32:40","slug":"jupiter-procyon-sirius","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/10\/03\/jupiter-procyon-sirius\/","title":{"rendered":"Jupiter, Procyon, Sirius"},"content":{"rendered":"

Trois astres d’\u00e9clat sensiblement identique jalonnent le ciel en fin de nuit, comme le montre ce clich\u00e9.<\/p>\n

\"ciel2\"<\/a><\/p>\n

Jupiter <\/a>est le plus brillant (magnitude -1,9) : la plan\u00e8te g\u00e9ante gazeuse se rapproche de nous et sera \u00e0 l’opposition le 6 f\u00e9vrier 2015. Jupiter est actuellement dans la constellation du Cancer, non loin de l’amas ouvert d’\u00e9toiles Messier 44<\/a>.<\/p>\n

En allant vers l’ouest nous trouvons ensuite Procyon (magnitude 0,4), une \u00e9toile g\u00e9ante double, la plus brillante \u00e9toile de la constellation du Petit Chien et la septi\u00e8me plus brillante du ciel nocturne.<\/p>\n

Toujours plus \u00e0 l’ouest se trouve Sirius. Apr\u00e8s le Soleil<\/a>, Sirius est la plus brillante \u00e9toile vue de la Terre. Elle est situ\u00e9e \u00e0 un peu moins de 9 ann\u00e9es-lumi\u00e8re de nous et sa magnitude apparente est de -1,5.<\/p>\n

Sirius (Alpha Canis Majoris<\/em>) est la principale \u00e9toile de la constellation du Grand Chien ; son apparition \u00e0 l’aube en \u00e9t\u00e9 est \u00e0 l’origine du mot canicule. Chez les Egyptiens le retour de Sirius le matin annon\u00e7ait la prochaine crue du Nil.<\/p>\n

Sur cette image prise avec un bo\u00eetier Nikon D 3200 et un objectif 18-105 mm de focale (10 secondes de pose \u00e0 3200 iso) on constate une nouvelle fois que la pollution lumineuse<\/a> emp\u00eache d’obtenir un ciel bien noir piquet\u00e9 d’\u00e9toiles<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Trois astres d’\u00e9clat sensiblement identique jalonnent le ciel en fin de nuit, comme le montre ce clich\u00e9. Jupiter est le plus brillant (magnitude -1,9) : la plan\u00e8te g\u00e9ante gazeuse se rapproche de nous et sera \u00e0 l’opposition le 6 f\u00e9vrier 2015. Jupiter est actuellement dans la constellation du Cancer, non loin de l’amas ouvert d’\u00e9toiles … Continuer la lecture de Jupiter, Procyon, Sirius<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":933,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[134,438,411,440,89,90,192,433,114,167,439,410,97,175],"class_list":["post-931","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-amas-ouvert","tag-constellation-du-cancer","tag-constellation-du-grand-chien","tag-constellation-du-petit-chien","tag-etoile","tag-jupiter","tag-magnitude","tag-messier-44","tag-planete","tag-pollution-lumineuse","tag-procyon","tag-sirius","tag-soleil","tag-terre"],"yoast_head":"\nJupiter, Procyon, Sirius<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/10\/03\/jupiter-procyon-sirius\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jupiter, Procyon, Sirius\" \/>\n<meta property=\"og:description\" content=\"Trois astres d’\u00e9clat sensiblement identique jalonnent le ciel en fin de nuit, comme le montre ce clich\u00e9. 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