{"id":9435,"date":"2018-07-14T16:24:59","date_gmt":"2018-07-14T16:24:59","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9435"},"modified":"2018-08-18T09:07:28","modified_gmt":"2018-08-18T09:07:28","slug":"vacances-etoilees-sous-le-ciel-du-livradois","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/07\/14\/vacances-etoilees-sous-le-ciel-du-livradois\/","title":{"rendered":"Vacances \u00e9toil\u00e9es sous le ciel du Livradois"},"content":{"rendered":"

La semaine du 7 au 14 juillet a \u00e9t\u00e9 pour moi l’occasion de d\u00e9couvrir le ciel nocturne du Livradois \u00e0 l’occasion d’un s\u00e9jour en g\u00eete.<\/strong><\/p>\n

Limit\u00e9 \u00e0 l’EST par les monts du Forez, le Livradois est une r\u00e9gion naturelle fran\u00e7aise situ\u00e9e au centre du Massif central, dans le d\u00e9partement du Puy-de-D\u00f4me. La ville la plus importante est Thiers,\u00a0capitale de la coutellerie. C’est \u00e0 c\u00f4t\u00e9 de Courpi\u00e8re, \u00e0 une dizaine de kilom\u00e8tres au SUD de Thiers, que se trouve le g\u00eete du Grillon<\/a>, un endroit id\u00e9al pour passer des vacances en famille… et tester les qualit\u00e9s du ciel nocturne de cette r\u00e9gion (voir ci-dessous la carte de pollution lumineuse<\/a> propos\u00e9e par l’association\u00a0AVEX<\/a>).<\/p>\n

\"\"<\/a>
Carte de la pollution lumineuse dans la r\u00e9gion de Courpi\u00e8re. \u00a9 AVEX<\/figcaption><\/figure>\n

Voici quelques images r\u00e9alis\u00e9es depuis le g\u00eete au cours de la seconde semaine de juillet avec un ciel bien d\u00e9gag\u00e9.<\/p>\n

On commence avec cette rotation d’\u00e9toiles<\/a> r\u00e9alis\u00e9e depuis le jardin du g\u00eete en pointant l’objectif (un Samyang de 12 mm de focale ouvert \u00e0 5.6) c\u00f4t\u00e9 NORD en direction de l’\u00e9toile polaire<\/a> et en additionnant pr\u00e8s de 300 poses de 30 secondes (sensibilit\u00e9 de 3.200 iso) \u00e0 l’aide du logiciel StarMax<\/a>\u00a0(un flash Iridium<\/a> est visible l\u00e9g\u00e8rement \u00e0 droite au-dessus de l’arbre). Le premier plan est \u00e9clair\u00e9 avec une lampe rouge :<\/p>\n

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

En pointant le bo\u00eetier en direction du SUD, on peut admirer en pleine nuit la Voie lact\u00e9e<\/a> et la brillante plan\u00e8te Mars<\/a> au-dessus de l’arbre (addition de 2 poses de 30 secondes \u00e0 6.400 iso, objectif Samyang 12 mm ouvert \u00e0 5.6) :<\/p>\n

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

En s’\u00e9loignant \u00e0 quelques centaines de m\u00e8tres du g\u00eete un \u00e9tang permet de r\u00e9aliser des images originales (addition de 2 poses de 30 secondes \u00e0 6.400 iso, objectif Samyang 12 mm ouvert \u00e0 5.6, le ponton est \u00e9clair\u00e9 par une lampe de poche) :<\/p>\n

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

Ce s\u00e9jour \u00e9tait id\u00e9al pour photographier le ciel \u00e9toil\u00e9 en l’absence de Lune, le vieux croissant ne se levant qu’avant l’aube au-dessus des monts du Forez :<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

La semaine du 7 au 14 juillet a \u00e9t\u00e9 pour moi l’occasion de d\u00e9couvrir le ciel nocturne du Livradois \u00e0 l’occasion d’un s\u00e9jour en g\u00eete. Limit\u00e9 \u00e0 l’EST par les monts du Forez, le Livradois est une r\u00e9gion naturelle fran\u00e7aise situ\u00e9e au centre du Massif central, dans le d\u00e9partement du Puy-de-D\u00f4me. La ville la plus … Continuer la lecture de Vacances \u00e9toil\u00e9es sous le ciel du Livradois<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":9436,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[52,2544,2545,2543,963],"class_list":["post-9435","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-auvergne","tag-courpiere","tag-gite-du-grillon","tag-livradois","tag-starmax"],"yoast_head":"\nVacances \u00e9toil\u00e9es sous le ciel du Livradois<\/title>\n<meta name=\"description\" content=\"La semaine du 7 au 14 juillet a \u00e9t\u00e9 pour moi l'occasion de d\u00e9couvrir le ciel nocturne du Livradois \u00e0 l'occasion d'un s\u00e9jour en g\u00eete.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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