{"id":7634,"date":"2017-03-30T07:44:59","date_gmt":"2017-03-30T07:44:59","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=7634"},"modified":"2017-04-09T11:43:56","modified_gmt":"2017-04-09T11:43:56","slug":"29-mars-retour-jeune-croissant-de-lune-sur-lhorizon","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/03\/30\/29-mars-retour-jeune-croissant-de-lune-sur-lhorizon\/","title":{"rendered":"29 mars : le retour du jeune croissant de Lune sur l&#8217;horizon"},"content":{"rendered":"<p><strong>La quatri\u00e8me lunaison de l&#8217;ann\u00e9e a d\u00e9but\u00e9 avec un jeune croissant qui surplombait l&#8217;horizon dans la soir\u00e9e du 29 mars, 40 heures apr\u00e8s la Nouvelle Lune.<\/strong><\/p>\n<p>Comme \u00e0 chaque d\u00e9but de lunaison, c\u2019est un spectacle enchanteur qui attend les observateurs quand la nuit tombe. Entre deux et quatre jours apr\u00e8s la Nouvelle Lune, un petit <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/21\/le-croissant-lunaire-et-la-lumiere-cendree-le-20-mai\/\" target=\"_blank\">croissant lunaire<\/a> nous adresse un sourire lumineux, accompagn\u00e9 d\u2019une d\u00e9licate lueur sur le reste du disque lunaire, la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/09\/17\/en-video-un-saisissant-coucher-de-lumiere-cendree\/\" target=\"_blank\">lumi\u00e8re cendr\u00e9e<\/a> ou clair de Terre. Imaginez un astronaute plac\u00e9 sur la Lune \u00e0 cette \u00e9poque\u00a0: il verrait dans le ciel la Pleine Terre presque cent fois plus lumineuse que la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/05\/30\/video-pleine-lune-derriere-pic-teide\/\" target=\"_blank\">Pleine Lune<\/a> lorsque nous l\u2019admirons depuis notre plan\u00e8te\u00a0!<\/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<p>On pouvait en th\u00e9orie tenter de rep\u00e9rer le premier croissant de cette nouvelle lunaison (la quatri\u00e8me de l&#8217;ann\u00e9e) \u00e0 partir du 28 au soir, environ 16 heures seulement apr\u00e8s la Nouvelle Lune.<!--more--><\/p>\n<p>J&#8217;ai tent\u00e9 l&#8217;exp\u00e9rience sans succ\u00e8s : il faut dire que d\u00e9nicher un croissant de 0,7 % dans les lueurs cr\u00e9pusculaires est particuli\u00e8rement d\u00e9licat, m\u00eame arm\u00e9 d&#8217;une paire de jumelles. Pour le moment le plus fin croissant que j&#8217;ai pu immortaliser est celui du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/20\/un-minuscule-croissant-lunaire-age-de-18-heures\/\" target=\"_blank\">19 f\u00e9vrier 2015<\/a> \u00e2g\u00e9 de 18 heures (soit 0,9% du disque lunaire).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant.jpg\" rel=\"lightbox[7634]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7635\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant-450x305.jpg\" alt=\"\" width=\"450\" height=\"305\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant-450x305.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant-768x520.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant-1024x694.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2017\/03\/jeune_croissant.jpg 1330w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Le 29 mars en soir\u00e9e le jeune croissant de Lune \u00e9tait de 4% et devenait visible \u00e0 l&#8217;\u0153il nu sans probl\u00e8me. L&#8217;image ci-dessus (r\u00e9alis\u00e9e avec un bo\u00eetier Finepix HS20, zoom de 720 mm, pose de 2 sec \u00e0 200 iso) permet de le voir se glisser derri\u00e8re un lointain relief vers 21 heures, alors que le ciel est encore clair. \u00a0Environ 5\u00b0 \u00e0 droite de la Lune (en dehors du champ de cette image) brillait le petit point de la plan\u00e8te <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/03\/28\/la-discrete-planete-mercure-est-de-retour-au-crepuscule\/\" target=\"_blank\">Mercure<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>La quatri\u00e8me lunaison de l&#8217;ann\u00e9e a d\u00e9but\u00e9 avec un jeune croissant qui surplombait l&#8217;horizon dans la soir\u00e9e du 29 mars, 40 heures apr\u00e8s la Nouvelle Lune. Comme \u00e0 chaque d\u00e9but de lunaison, c\u2019est un spectacle enchanteur qui attend les observateurs quand la nuit tombe. Entre deux et quatre jours apr\u00e8s la Nouvelle Lune, un petit &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/03\/30\/29-mars-retour-jeune-croissant-de-lune-sur-lhorizon\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">29 mars : le retour du jeune croissant de Lune sur l&#8217;horizon<\/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":7635,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[483,88,140],"class_list":["post-7634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-jeune-croissant","tag-lumiere-cendree","tag-mercure"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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