{"id":4449,"date":"2015-12-10T06:04:17","date_gmt":"2015-12-10T06:04:17","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4449"},"modified":"2015-12-17T05:06:59","modified_gmt":"2015-12-17T05:06:59","slug":"clair-de-terre-sur-la-lune-le-9-decembre","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/10\/clair-de-terre-sur-la-lune-le-9-decembre\/","title":{"rendered":"Clair de Terre sur la Lune le 9 d\u00e9cembre"},"content":{"rendered":"

Depuis trois jours \u00e0 l’aube une douce lueur \u00e9claire la Lune. C’est le clair de Terre ou lumi\u00e8re cendr\u00e9e, un spectacle \u00e0 suivre autour de la Nouvelle Lune.<\/strong><\/p>\n

C’est un spectacle dont on ne se lasse pas : pendant les jours qui pr\u00e9c\u00e8dent (\u00e0 l’aube) ou suivent (le soir) chaque Nouvelle Lune, le visage de S\u00e9l\u00e9n\u00e9 est l\u00e9g\u00e8rement \u00e9clair\u00e9, juste \u00e0 c\u00f4t\u00e9 du croissant tr\u00e8s brillant.<\/p>\n

\"lumiere_cendree2\"<\/a><\/p>\n

Ce ph\u00e9nom\u00e8ne est appel\u00e9 lumi\u00e8re cendr\u00e9e<\/a> ou clair de Terre : alors que le croissant est directement \u00e9clair\u00e9 par le Soleil<\/a>, le reste du disque lunaire re\u00e7oit la lumi\u00e8re solaire que la Terre renvoie dans l’espace.<\/p>\n

\"cendree2\"<\/a><\/p>\n

Vue de la Lune<\/a>, la Terre est quatre fois plus grosse dans le ciel que notre satellite naturel, une spectacle que seuls ont pu admirer les astronautes des missions Apollo et qui a \u00e9t\u00e9 immortalis\u00e9 par diff\u00e9rentes sondes lunaires comme l’orbiteur japonais Kaguya (image ci-dessous). Cet astre dont le diam\u00e8tre apparent est de 2 degr\u00e9s pour un observateur lunaire est entour\u00e9 d’une couche nuageuse variable qui renvoie dans l’espace une quantit\u00e9 de lumi\u00e8re suffisante pour \u00e9clairer les paysages lunaires normalement plong\u00e9s dans la nuit.<\/p>\n

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

Le 19 mai 2015 l’astrophysicien am\u00e9ricain Fred Espenak<\/a> avait film\u00e9 un saisissant coucher de lumi\u00e8re cendr\u00e9e<\/a> dans les montagnes de l’Arizona lors de la jeune Lune. La situation sera identique en soir\u00e9e deux ou trois jours apr\u00e8s la Nouvelle Lune du 11 d\u00e9cembre si vous n’avez pas pu admirer ce ph\u00e9nom\u00e8ne \u00e0 l’aube ces derniers jours.<\/p>\n","protected":false},"excerpt":{"rendered":"

Depuis trois jours \u00e0 l’aube une douce lueur \u00e9claire la Lune. C’est le clair de Terre ou lumi\u00e8re cendr\u00e9e, un spectacle \u00e0 suivre autour de la Nouvelle Lune. C’est un spectacle dont on ne se lasse pas : pendant les jours qui pr\u00e9c\u00e8dent (\u00e0 l’aube) ou suivent (le soir) chaque Nouvelle Lune, le visage de … Continuer la lecture de Clair de Terre sur la Lune le 9 d\u00e9cembre<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":4457,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[181,978,1242,88,82],"class_list":["post-4449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-apollo","tag-clair-de-terre","tag-fred-espenak","tag-lumiere-cendree","tag-lune"],"yoast_head":"\nClair de Terre sur la Lune le 9 d\u00e9cembre<\/title>\n<meta name=\"description\" content=\"Depuis trois jours \u00e0 l'aube une douce lueur \u00e9claire la Lune. 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