{"id":7026,"date":"2017-01-25T15:05:47","date_gmt":"2017-01-25T15:05:47","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=7026"},"modified":"2017-02-02T13:19:40","modified_gmt":"2017-02-02T13:19:40","slug":"le-planetarium-une-alternative-pour-decouvrir-les-etoiles","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/25\/le-planetarium-une-alternative-pour-decouvrir-les-etoiles\/","title":{"rendered":"Le plan\u00e9tarium, une alternative pour d\u00e9couvrir les \u00e9toiles"},"content":{"rendered":"

Que faire quand on habite en ville et qu’on a envie de d\u00e9couvrir le ciel \u00e9toil\u00e9 ? Une s\u00e9ance de plan\u00e9tarium offre d\u00e9j\u00e0 d’int\u00e9ressantes possibilit\u00e9s.<\/strong><\/p>\n

Tout le monde n’a pas la chance d’habiter en pleine campagne ou \u00e0 la montagne, loin de toute pollution lumineuse<\/a> et de pouvoir admirer depuis le pas de sa porte la Voie lact\u00e9e<\/a> ou m\u00eame la lumi\u00e8re zodiacale<\/a>. Il y a quelques mois une publication de la revue Science Advances<\/em> intitul\u00e9e\u00a0The new world atlas of artificial night sky brightness<\/em><\/a> avait tir\u00e9 la sonnette d’alarme, rappelant que plus de 80% de la surface de notre plan\u00e8te \u00e9tait touch\u00e9e par la pollution lumineuse, un chiffre qui grimpait \u00e0 99% pour l’Europe !<\/p>\n

\"planetarium1\"<\/a><\/p>\n

Pour ceux dont le ciel nocturne se r\u00e9sume \u00e0 un voile lumineux, il reste la possibilit\u00e9 d’aller faire un tour dans un plan\u00e9tarium.<\/p>\n

Un plan\u00e9tarium est constitu\u00e9 d’une salle circulaire surmont\u00e9e d’un d\u00f4me h\u00e9misph\u00e9rique sur lequel on projette l’image du ciel nocturne. Le proc\u00e9d\u00e9 a \u00e9t\u00e9 imagin\u00e9 au d\u00e9but du XXe si\u00e8cle par l’astronome allemand Max Wolf, alors directeur de l’Observatoire de Heidelberg<\/a>, puis r\u00e9alis\u00e9 par la firme Carl Zeiss<\/a> dont les projecteurs \u00e9quipent toujours certains plan\u00e9tariums comme celui de Reims<\/a>.<\/p>\n

L’Association des Plan\u00e9tariums de Langue Fran\u00e7aise (APLF<\/a>) recense toutes les structures fixes (plan\u00e9tariums sous un d\u00f4me) et mobiles (plan\u00e9tariums gonflables) qui vous accueillent en France. Du plus haut (ouvert \u00e0 l’Observatoire du Pic du Midi<\/a>) au plus grand (\u00e0 la Cit\u00e9 des sciences et de l’industrie, qui accueille aussi les RCE<\/a> tous les deux ans), il y en a pour tous les go\u00fbts. Certains sont \u00e9quip\u00e9s d’un dispositif opto-m\u00e9canique traditionnel (projecteurs Zeiss par exemple) alors que d’autres ont fait le choix du num\u00e9rique, un moyen de proposer r\u00e9guli\u00e8rement de nouveaux spectacles.<\/p>\n

Les plan\u00e9tariums sont de merveilleux outils de vulgarisation qui permettent de d\u00e9couvrir l’espace qui nous entoure en \u00e9tant confortablement install\u00e9. Il ne faudrait pas pour autant qu’ils deviennent des sortes de mus\u00e9es o\u00f9 l’on se rendrait pour d\u00e9couvrir une esp\u00e8ce disparue, le ciel \u00e9toil\u00e9 !<\/p>\n","protected":false},"excerpt":{"rendered":"

Que faire quand on habite en ville et qu’on a envie de d\u00e9couvrir le ciel \u00e9toil\u00e9 ? Une s\u00e9ance de plan\u00e9tarium offre d\u00e9j\u00e0 d’int\u00e9ressantes possibilit\u00e9s. Tout le monde n’a pas la chance d’habiter en pleine campagne ou \u00e0 la montagne, loin de toute pollution lumineuse et de pouvoir admirer depuis le pas de sa porte … Continuer la lecture de Le plan\u00e9tarium, une alternative pour d\u00e9couvrir les \u00e9toiles<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":7046,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[1999,1857,1991,167,1806,2000],"class_list":["post-7026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-association-des-planetariums-de-langue-francaise","tag-observatoire-de-heidelberg","tag-planetarium","tag-pollution-lumineuse","tag-science-advances","tag-zeiss"],"yoast_head":"\nLe plan\u00e9tarium, une alternative pour d\u00e9couvrir les \u00e9toiles<\/title>\n<meta name=\"description\" content=\"Que faire quand on habite en ville et qu'on a envie de d\u00e9couvrir le ciel \u00e9toil\u00e9 ? 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