{"id":9682,"date":"2018-10-07T07:53:47","date_gmt":"2018-10-07T07:53:47","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9682"},"modified":"2018-10-17T13:23:20","modified_gmt":"2018-10-17T13:23:20","slug":"partie-de-cache-cache-pour-la-lumiere-cendree","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/10\/07\/partie-de-cache-cache-pour-la-lumiere-cendree\/","title":{"rendered":"Partie de cache-cache pour la lumi\u00e8re cendr\u00e9e"},"content":{"rendered":"<p><strong>Retour sur la fin de nuit du 6 octobre alors que la vieille Lune accompagn\u00e9e de la lumi\u00e8re cendr\u00e9e jouait \u00e0 cache-cache avec les nuages.<\/strong><\/p>\n<p>Avez-vous d\u00e9j\u00e0 entendu parler de la lumi\u00e8re cendr\u00e9e ? Cette\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/12\/en-images-lumiere-cendree\/\" target=\"_blank\" rel=\"noopener noreferrer\">douce clart\u00e9<\/a>, environ 10.000 fois plus faible que la\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/14\/pleine-lune-loups-a-murrays-bay\/\" target=\"_blank\" rel=\"noopener noreferrer\">Pleine Lune<\/a>, permet de distinguer le reste du disque lunaire juste avant ou apr\u00e8s la Nouvelle Lune, quand le croissant est assez fin pour ne pas trop nous \u00e9blouir.\u00a0Alors que ce croissant re\u00e7oit directement les rayons solaires, le reste de la surface lunaire est tr\u00e8s l\u00e9g\u00e8rement \u00e9clair\u00e9 par la lumi\u00e8re solaire que la Terre renvoie dans l\u2019espace (les oc\u00e9ans et les nuages terrestres jouent un peu un r\u00f4le de miroir).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/lumiere_cendree2.jpg\" rel=\"lightbox[9682]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2839\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/lumiere_cendree2-450x364.jpg\" alt=\"\" width=\"450\" height=\"364\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/lumiere_cendree2-450x364.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/lumiere_cendree2.jpg 840w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Le disque lunaire semble gris clair comme de la cendre, ce qui explique le nom de lumi\u00e8re cendr\u00e9e.<!--more--><\/p>\n<p>Pour photographier la faible lueur de la lumi\u00e8re cendr\u00e9e, vous avez deux possibilit\u00e9s : soit\u00a0faire une pose photographique assez longue en fixant votre bo\u00eetier photo sur une monture \u00e9quatoriale motoris\u00e9e pour compenser la rotation de la Terre, soit utiliser une tr\u00e8s haute sensibilit\u00e9.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree.jpg\" rel=\"lightbox[9682]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9683\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree-450x279.jpg\" alt=\"\" width=\"450\" height=\"279\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree-450x279.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree-768x476.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree-1024x635.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/10\/cendree.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>C&#8217;est cette seconde option qui a \u00e9t\u00e9 choisie pour r\u00e9aliser ce clich\u00e9 o\u00f9 notre satellite naturel joue \u00e0 cache-cache avec les nuages : 1 seconde de pose \u00e0 6200 iso avec un bo\u00eetier Nikon D7100 install\u00e9 sur pied photo, objectif de 300 mm de focale ouvert \u00e0 5,6.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" src=\"https:\/\/player.vimeo.com\/video\/134736291\" width=\"640\" height=\"480\" frameborder=\"0\" 0=\"webkitallowfullscreen\" 1=\"mozallowfullscreen\" 2=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Retour sur la fin de nuit du 6 octobre alors que la vieille Lune accompagn\u00e9e de la lumi\u00e8re cendr\u00e9e jouait \u00e0 cache-cache avec les nuages. Avez-vous d\u00e9j\u00e0 entendu parler de la lumi\u00e8re cendr\u00e9e ? Cette\u00a0douce clart\u00e9, environ 10.000 fois plus faible que la\u00a0Pleine Lune, permet de distinguer le reste du disque lunaire juste avant ou &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/10\/07\/partie-de-cache-cache-pour-la-lumiere-cendree\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Partie de cache-cache pour la lumi\u00e8re cendr\u00e9e<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":9683,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[978,88,2571],"class_list":["post-9682","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-clair-de-terre","tag-lumiere-cendree","tag-nikon"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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