{"id":1172,"date":"2014-11-19T09:54:33","date_gmt":"2014-11-19T09:54:33","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1172"},"modified":"2014-11-24T16:05:16","modified_gmt":"2014-11-24T16:05:16","slug":"nebuleuse-dorion","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/19\/nebuleuse-dorion\/","title":{"rendered":"La n\u00e9buleuse d’Orion"},"content":{"rendered":"

La plus belle n\u00e9buleuse du ciel se situe dans la constellation d’Orion<\/a>. Cette n\u00e9buleuse, qui ressemble \u00e0 une aile de papillon, porte le num\u00e9ro 42 dans le catalogue de l’astronome fran\u00e7ais Charles Messier.<\/p>\n

\"ciel6b\"<\/a><\/p>\n

Sous un tr\u00e8s bon ciel (ci-dessus dans les Hautes-Alpes<\/a>), la n\u00e9buleuse Messier 42 est d\u00e9j\u00e0 visible \u00e0 l’\u0153il nu comme une petite tache floue (un peu plus haut que la croix du clocher).<\/p>\n

Il y a sans doute tr\u00e8s longtemps que les hommes ont remarqu\u00e9 la pr\u00e9sence de cette n\u00e9buleuse bien qu’on attribue sa d\u00e9couverte en 1610 \u00e0 Nicolas-Claude Fabri de Peiresc .<\/p>\n

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

Dans une lunette astronomique<\/a>\u00a0ou un t\u00e9lescope<\/a>\u00a0la forme caract\u00e9ristique de la n\u00e9buleuse devient \u00e9vidente avec en son centre plusieurs \u00e9toiles <\/a>formant l’amas<\/a> du Trap\u00e8ze (image ci-dessus).<\/p>\n

Seule la photographie peut r\u00e9v\u00e9ler les couleurs des n\u00e9buleuses. En vision nocturne notre\u00a0\u0153il utilise les b\u00e2tonnets au fond de la r\u00e9tine comme cellules r\u00e9ceptrices : ces derniers ne permettent que la vision en noir et blanc, avec des nuances de gris. Dans les gros t\u00e9lescopes qui collectent beaucoup de lumi\u00e8re on peut commencer \u00e0 d\u00e9tecter visuellement de p\u00e2les couleurs dans la n\u00e9buleuse.<\/p>\n","protected":false},"excerpt":{"rendered":"

La plus belle n\u00e9buleuse du ciel se situe dans la constellation d’Orion. Cette n\u00e9buleuse, qui ressemble \u00e0 une aile de papillon, porte le num\u00e9ro 42 dans le catalogue de l’astronome fran\u00e7ais Charles Messier. Sous un tr\u00e8s bon ciel (ci-dessus dans les Hautes-Alpes), la n\u00e9buleuse Messier 42 est d\u00e9j\u00e0 visible \u00e0 l’\u0153il nu comme une petite … Continuer la lecture de La n\u00e9buleuse d’Orion<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":1173,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[536,94,539,133,354,89,460,148,353,355,535,538,540,96,537],"class_list":["post-1172","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-amas-du-trapeze","tag-astronome","tag-batonnet","tag-charles-messier","tag-constellation-dorion","tag-etoile","tag-hautes-alpes","tag-lunette-astronomique","tag-messier-42","tag-nebuleuse-dorion","tag-nicolas-claude-fabri-de-peiresc","tag-oeil","tag-retine","tag-telescope","tag-vision-nocturne"],"yoast_head":"\nLa n\u00e9buleuse d'Orion<\/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\/11\/19\/nebuleuse-dorion\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"La n\u00e9buleuse d'Orion\" \/>\n<meta property=\"og:description\" content=\"La plus belle n\u00e9buleuse du ciel se situe dans la constellation d’Orion. Cette n\u00e9buleuse, qui ressemble \u00e0 une aile de papillon, porte le num\u00e9ro 42 dans le catalogue de l’astronome fran\u00e7ais Charles Messier. 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