{"id":4230,"date":"2015-12-05T09:05:04","date_gmt":"2015-12-05T09:05:04","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4230"},"modified":"2015-12-12T07:31:56","modified_gmt":"2015-12-12T07:31:56","slug":"la-constellation-dorion-comme-vous-ne-la-verrez-jamais","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/05\/la-constellation-dorion-comme-vous-ne-la-verrez-jamais\/","title":{"rendered":"La constellation d’Orion comme vous ne la verrez jamais"},"content":{"rendered":"

En combinant l’usage d’un filtre et une tr\u00e8s longue pose photographique, Stanislav Volskiy nous offre une vision in\u00e9dite de la constellation d’Orion.<\/strong><\/p>\n

Beaucoup d’entre nous ont d\u00e9j\u00e0 admir\u00e9 dans le ciel hivernal la belle constellation d’Orion<\/a>. Nous connaissons les principaux astres qui d\u00e9limitent le corps du vaniteux chasseur de la mythologie grecque : ses \u00e9paules sont marqu\u00e9es par B\u00e9telgeuse et Bellatrix, sa taille est repr\u00e9sent\u00e9e par 3 \u00e9toiles align\u00e9es et Sa\u00efph et Rigel symbolisent ses pieds.\u00a0 Si nous n’avons pas trop de pollution lumineuse<\/a> et que nos yeux sont bien habitu\u00e9s \u00e0 l’obscurit\u00e9, nous pouvons m\u00eame distinguer la petite tache diffuse de Messier 42<\/a>.<\/p>\n

\"orion1\"<\/a><\/p>\n

Mais jamais personne ne verra la constellation d’Orion<\/a> comme sur cette image de Stanislav Volskiy<\/a>.\u00a0 Par quelle op\u00e9ration magique cet astrophotographe est-il parvenu \u00e0 obtenir ces immenses n\u00e9bulosit\u00e9s multicolores qui m\u00e9tamorphosent la constellation ?<\/p>\n

\"orion2\"<\/a><\/p>\n

Stanislav Volskiy a deux atouts ; tout d’abord il dispose d’un petit observatoire automatis\u00e9 au Chili, au milieu du d\u00e9sert d’Atacama<\/a>. Cette r\u00e9gion, avec un ciel d\u00e9gag\u00e9 plus de 300 nuits par an, loin de toute lumi\u00e8re parasite, est un paradis pour astronomes <\/a>qui ne s’y sont pas tromp\u00e9s puisque les plus grands t\u00e9lescopes de la plan\u00e8te y sont install\u00e9s ( ALMA<\/a>, VLT<\/a>, GMT<\/a>, E-ELT<\/a>…).<\/p>\n

Deuxi\u00e8me atout pour Stanislav Volskiy : c’est un photographe patient. Pour cette image de la constellation d’Orion il a additionn\u00e9 de nombreux clich\u00e9s repr\u00e9sentant l’\u00e9quivalent d’une pose unique de 212 heures ! Ces clich\u00e9s ont \u00e9t\u00e9 pris \u00e0 l’aide d’un filtre H-alpha destin\u00e9 \u00e0 mieux restituer les n\u00e9buleuses en \u00e9mission dont la plupart ont une dominante rouge, la couleur de la raie de l’hydrog\u00e8ne alpha (656,3 nanom\u00e8tres de longueur d’onde).<\/p>\n","protected":false},"excerpt":{"rendered":"

En combinant l’usage d’un filtre et une tr\u00e8s longue pose photographique, Stanislav Volskiy nous offre une vision in\u00e9dite de la constellation d’Orion. Beaucoup d’entre nous ont d\u00e9j\u00e0 admir\u00e9 dans le ciel hivernal la belle constellation d’Orion. Nous connaissons les principaux astres qui d\u00e9limitent le corps du vaniteux chasseur de la mythologie grecque : ses \u00e9paules … Continuer la lecture de La constellation d’Orion comme vous ne la verrez jamais<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":4231,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[635,354,634,1003,353,1360,1359],"class_list":["post-4230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-chili","tag-constellation-dorion","tag-desert-datacama","tag-h-alpha","tag-messier-42","tag-nebuleuse-en-emission","tag-stanislav-volskiy"],"yoast_head":"\nLa constellation d'Orion comme vous ne la verrez jamais<\/title>\n<meta name=\"description\" content=\"En combinant l'usage d'un filtre et une tr\u00e8s longue pose photographique, Stanislav 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