{"id":20213,"date":"2024-09-29T09:42:52","date_gmt":"2024-09-29T09:42:52","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=20213"},"modified":"2024-10-09T13:01:32","modified_gmt":"2024-10-09T13:01:32","slug":"rayon-vert-au-pied-du-mont-blanc","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/29\/rayon-vert-au-pied-du-mont-blanc\/","title":{"rendered":"Rayon vert au pied du Mont-Blanc"},"content":{"rendered":"<h5>Le Soleil qui pointe son museau derri\u00e8re les sommets du massif du Mont-Blanc, et c&#8217;est un rayon vert qui s&#8217;invite bri\u00e8vement.<\/h5>\n<h5>Un curieux ph\u00e9nom\u00e8ne :<\/h5>\n<p>Le rayon vert est un\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/22\/en-images-les-phenomenes-lumineux-atmospheriques\/\" target=\"_blank\" rel=\"noopener noreferrer\">photom\u00e9t\u00e9ore<\/a>\u00a0qui a \u00e9t\u00e9 rendu c\u00e9l\u00e8bre dans un roman de\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/personnalites\/homme-jules-verne-427\/\" target=\"_blank\" rel=\"noopener noreferrer\">Jules Verne<\/a>\u00a0au titre \u00e9ponyme. Publi\u00e9 en 1882, ce r\u00e9cit relate les p\u00e9r\u00e9grinations d\u2019un couple parti en Ecosse pour tenter d\u2019observer ce curieux ph\u00e9nom\u00e8ne. De quoi s\u2019agit-il ? R\u00e9ponse avec cette vid\u00e9o :<\/p>\n<p><iframe loading=\"lazy\" title=\"LE RAYON VERT : Quel est ce rare ph\u00e9nom\u00e8ne ? \u2600\ufe0f\" width=\"474\" height=\"267\" src=\"https:\/\/www.youtube.com\/embed\/BA4qFJ22yTU?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Le rayon vert est donc la combinaison de deux ph\u00e9nom\u00e8nes optiques diff\u00e9rents, la dispersion et la diffusion de la lumi\u00e8re solaire par l\u2019atmosph\u00e8re\u00a0 terrestre. Cette derni\u00e8re, beaucoup plus \u00e9paisse \u00e0 l\u2019horizon, joue le r\u00f4le d\u2019un prisme. <!--more--><\/p>\n<h5>Au pied du Mont-Blanc :<\/h5>\n<p>Depuis mon site d&#8217;observation sur les hauteurs du Beaujolais, le Mont-Blanc se situe \u00e0 160 kilom\u00e8tres \u00e0 vol d&#8217;oiseau. On le voit donc r\u00e9guli\u00e8rement, surtout \u00e0 l&#8217;aube quand il se d\u00e9tache sur le ciel qui s&#8217;\u00e9claircit. Ma position me permet d&#8217;assister au lever du Soleil derri\u00e8re ce massif montagneux aux alentours des \u00e9quinoxes :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc.jpg\" rel=\"lightbox[20213]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20214\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/rayonvert_montblanc.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Ce 29 septembre, j&#8217;ai d\u00e9couvert sur ma s\u00e9rie d&#8217;images du lever de Soleil un rayon vert qui s&#8217;est bri\u00e8vement form\u00e9 aux premiers rayons. Le clich\u00e9 a \u00e9t\u00e9 r\u00e9alis\u00e9 avec un bo\u00eetier Panasonic FZ 82 et son zoom r\u00e9gl\u00e9 sur 500 millim\u00e8tres de focale.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/02\/20\/pilier-de-lumiere-au-dessus-de-letna-en-eruption\/\" target=\"_blank\" rel=\"noopener\">Pilier de lumi\u00e8re au-dessus de l\u2019Etna en \u00e9ruption<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/07\/13\/festival-de-nuages-noctiluques-depuis-le-beaujolais\/\" target=\"_blank\" rel=\"noopener\">Festival de nuages noctiluques depuis le Beaujolais<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/08\/25\/insolite-mirage-solaire-et-rayon-vert\/\" target=\"_blank\" rel=\"noopener\">Insolite : mirage solaire et rayon vert<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/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>Le Soleil qui pointe son museau derri\u00e8re les sommets du massif du Mont-Blanc, et c&#8217;est un rayon vert qui s&#8217;invite bri\u00e8vement. Un curieux ph\u00e9nom\u00e8ne : Le rayon vert est un\u00a0photom\u00e9t\u00e9ore\u00a0qui a \u00e9t\u00e9 rendu c\u00e9l\u00e8bre dans un roman de\u00a0Jules Verne\u00a0au titre \u00e9ponyme. Publi\u00e9 en 1882, ce r\u00e9cit relate les p\u00e9r\u00e9grinations d\u2019un couple parti en Ecosse pour &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/29\/rayon-vert-au-pied-du-mont-blanc\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Rayon vert au pied du Mont-Blanc<\/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":20214,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[85],"tags":[2450,2623,709],"class_list":["post-20213","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-meteores","tag-mont-blanc","tag-panasonic-dc-fz82","tag-rayon-vert"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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