{"id":4008,"date":"2015-11-20T05:50:29","date_gmt":"2015-11-20T05:50:29","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4008"},"modified":"2015-11-26T05:30:45","modified_gmt":"2015-11-26T05:30:45","slug":"la-grande-lunette-de-lobservatoire-de-nice","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/20\/la-grande-lunette-de-lobservatoire-de-nice\/","title":{"rendered":"La Grande Lunette de l’Observatoire de Nice"},"content":{"rendered":"

Mise en service en 1887, La quatri\u00e8me plus grande lunette astronomique du monde est toujours op\u00e9rationnelle \u00e0 l’Observatoire de Nice.\u00a0<\/strong><\/p>\n

Quand on arrive sur Nice depuis Antibes, le regard est attir\u00e9 de loin par une coupole astronomique.<\/p>\n

\"coupole_nice2\"<\/a><\/p>\n

Elle est le symbole de l’Observatoire de Nice<\/a>, construit au sommet du Mont Gros (374 m au-dessus de la Baie des Anges) \u00e0 partir de 1878 gr\u00e2ce \u00e0 l’argent du banquier philanthrope Rapha\u00ebl Bischoffsheim .<\/p>\n

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

Rapha\u00ebl Bischoffsheim fit appel \u00e0 son ami l’architecte Charles Garnier pour la r\u00e9alisation des b\u00e2timents de l’observatoire. Celui destin\u00e9 \u00e0 accueillir la Grande Lunette devait \u00eatre, pour son commanditaire, “un temple de l’Astronomie plac\u00e9 sous le signe de la lumi\u00e8re solaire”. L’\u00e9difice, de 26,4 m de large pour 10 m de haut, appuie ses fondations sur le rocher 7 m plus bas. L’entr\u00e9e est surmont\u00e9 d’un bronze de Paul Armand Bayard de la Vingtrie repr\u00e9sentant Apollon qui \u00e9merge du Zodiaque.<\/p>\n

\"lunette2\"<\/a><\/p>\n

La coupole de 23 m de diam\u00e8tre est l’\u0153uvre de Gustave Eiffel. D’un poids de 95 tonnes, elle pouvait \u00eatre d\u00e9plac\u00e9e tr\u00e8s facilement par un seul homme gr\u00e2ce \u00e0 un ing\u00e9nieux syst\u00e8me : elle flottait sur une cuve annulaire contenant 95 000 litres d’eau additionn\u00e9e de chlorure de magn\u00e9sium pour ne pas geler (en 1969 on a supprim\u00e9 ce liquide et la coupole a \u00e9t\u00e9 motoris\u00e9e).<\/p>\n

La Grande Lunette a un objectif de 76 cm de diam\u00e8tre et une focale de 17,89 m ; taill\u00e9 par les fr\u00e8res Paul et Prosper Henry, son grossissement peut atteindre 2250 fois. Lors de sa mise en service en 1887, la \u00a0Grande Lunette de Nice \u00e9tait la plus grande du monde, ex-aequo avec celle de l’Observatoire de Poulkovo<\/a> \u00e0 Saint-Petersbourg. C’est aujourd’hui la quatri\u00e8me derri\u00e8re les lunettes de Yerkes<\/a>, Lick <\/a>(USA) et Meudon <\/a>(France).<\/p>\n","protected":false},"excerpt":{"rendered":"

Mise en service en 1887, La quatri\u00e8me plus grande lunette astronomique du monde est toujours op\u00e9rationnelle \u00e0 l’Observatoire de Nice.\u00a0 Quand on arrive sur Nice depuis Antibes, le regard est attir\u00e9 de loin par une coupole astronomique. Elle est le symbole de l’Observatoire de Nice, construit au sommet du Mont Gros (374 m au-dessus de … Continuer la lecture de La Grande Lunette de l’Observatoire de Nice<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":4009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[1330,1331,1327,1326,1328,1329,1325],"class_list":["post-4008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-charles-garnier","tag-gustave-eiffel","tag-mont-gros","tag-observatoire-de-nice","tag-paul-henry","tag-prosper-henry","tag-raphael-bischoffsheim"],"yoast_head":"\nLa grande lunette de l'Observatoire de Nice<\/title>\n<meta name=\"description\" content=\"Mise en service en 1887, La quatri\u00e8me plus grande lunette astronomique du monde est toujours op\u00e9rationnelle \u00e0 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