{"id":6884,"date":"2017-01-04T13:27:13","date_gmt":"2017-01-04T13:27:13","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6884"},"modified":"2017-01-11T12:32:22","modified_gmt":"2017-01-11T12:32:22","slug":"latmosphere-deforme-un-jeune-croissant-de-lune","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/04\/latmosphere-deforme-un-jeune-croissant-de-lune\/","title":{"rendered":"L’atmosph\u00e8re d\u00e9forme un jeune croissant de Lune"},"content":{"rendered":"

Il s’en passe de belles dans le d\u00e9sert d’Atacama o\u00f9 l’on peut observer les \u00e9tranges contorsions d’un jeune croissant de Lune \u00e0 l’horizon.<\/strong><\/p>\n

L’astrophotographe Petr Hor\u00e1lek est l’un des ambassadeurs de l’ESO<\/a> qui nous r\u00e9gale r\u00e9guli\u00e8rement de belles images c\u00e9lestes. Il a par exemple photographi\u00e9 une chapelle tch\u00e8que sous la galaxie d’Androm\u00e8de<\/a>, une f\u00e9erie cosmique dans le ciel de La Silla<\/a> ou encore les beaut\u00e9s du ciel nocturne dans le d\u00e9sert du Kalahari<\/a>. \u00a0Cette fois c’est l’\u00e9trange coucher d’un jeune croissant de Lune qu’il a saisi dans le d\u00e9sert d’Atacama au Chili.<\/p>\n

\"croissant2\"<\/a><\/p>\n

Comment le fin croissant peut-il changer d’apparence et sembler se briser \u00e0 l’horizon de cette fa\u00e7on ?<\/p>\n

Encore une fois c’est l’atmosph\u00e8re terrestre qui nous joue des tours. Il faut imaginer cette atmosph\u00e8re comme un empilement de couches d’air aux propri\u00e9t\u00e9s diff\u00e9rentes (temp\u00e9rature, pression, humidit\u00e9). Ces diff\u00e9rentes couches sont parfaitement mises en \u00e9vidence sur cette photographie de franges solaires<\/a> r\u00e9alis\u00e9e en Bourgogne \u00e0 l’occasion d’un lever de Soleil :<\/p>\n

\"Franges<\/a>
Franges solaires<\/figcaption><\/figure>\n

Les rayons de lumi\u00e8re qui traversent chacune de ces couches subissent une r\u00e9fraction diff\u00e9rente, ils ne sont pas d\u00e9vi\u00e9s de la m\u00eame fa\u00e7on. C’est le m\u00eame ph\u00e9nom\u00e8ne qui est \u00e0 l’origine du Soleil en vase \u00e9trusque sur la mer de Marmara<\/a>.<\/p>\n

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

N’h\u00e9sitez pas \u00e0 faire un tour dans la galerie des ph\u00e9nom\u00e8nes lumineux atmosph\u00e9riques<\/a> qui vous r\u00e9serve quelques belles surprises !<\/p>\n","protected":false},"excerpt":{"rendered":"

Il s’en passe de belles dans le d\u00e9sert d’Atacama o\u00f9 l’on peut observer les \u00e9tranges contorsions d’un jeune croissant de Lune \u00e0 l’horizon. L’astrophotographe Petr Hor\u00e1lek est l’un des ambassadeurs de l’ESO qui nous r\u00e9gale r\u00e9guli\u00e8rement de belles images c\u00e9lestes. Il a par exemple photographi\u00e9 une chapelle tch\u00e8que sous la galaxie d’Androm\u00e8de, une f\u00e9erie cosmique … Continuer la lecture de L’atmosph\u00e8re d\u00e9forme un jeune croissant de Lune<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":6885,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[635,634,633,483,1154,1420],"class_list":["post-6884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-chili","tag-desert-datacama","tag-eso","tag-jeune-croissant","tag-jeune-lune","tag-petr-horalek"],"yoast_head":"\nL'atmosph\u00e8re d\u00e9forme un jeune croissant de Lune<\/title>\n<meta name=\"description\" content=\"Il s'en passe de belles dans le d\u00e9sert d'Atacama o\u00f9 l'on peut observer les \u00e9tranges contorsions d'un jeune croissant de Lune \u00e0 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