{"id":4609,"date":"2015-12-31T08:22:48","date_gmt":"2015-12-31T08:22:48","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4609"},"modified":"2016-01-08T05:57:43","modified_gmt":"2016-01-08T05:57:43","slug":"en-video-lairglow-letrange-lumiere-du-ciel-nocturne","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/31\/en-video-lairglow-letrange-lumiere-du-ciel-nocturne\/","title":{"rendered":"En vid\u00e9o : l&#8217;airglow, l&#8217;\u00e9trange lumi\u00e8re du ciel nocturne"},"content":{"rendered":"<p><strong>M\u00eame quand on l&#8217;observe dans le d\u00e9sert, le ciel nocturne n&#8217;est jamais totalement noir. Le responsable est l&#8217;<em>airglow<\/em>, un ph\u00e9nom\u00e8ne de chimiluminescence.<\/strong><\/p>\n<p>Depuis quelques ann\u00e9es les photographies de la vo\u00fbte c\u00e9leste montrent d&#8217;\u00e9tranges lueurs m\u00eame lorsqu&#8217;elles sont r\u00e9alis\u00e9es dans des sites exempts de toute <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/06\/28\/pollution-lumineuse\/\" target=\"_blank\">pollution lumineuse<\/a>, comme au pied du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/28\/en-video-le-centre-galactique-passe-au-zenith-du-vlt\/\" target=\"_blank\">VLT <\/a>dans le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/15\/penitents-de-glace-sous-les-etoiles-dans-le-desert-datacama\/\" target=\"_blank\">d\u00e9sert d&#8217;Atacama<\/a>.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x3hhnlv\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>C&#8217;est le rayonnement du <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/15\/dans-la-mer-le-soleil-est-encore-plus-beau\/\" target=\"_blank\">Soleil<\/a> qui est \u00e0 l&#8217;origine de ces lueurs nocturnes que les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" target=\"_blank\">astronomes <\/a>surnomment l&#8217;<em>airglow<\/em> : les rayons solaires ultraviolets d\u00e9truisent certaines mol\u00e9cules pr\u00e9sentes dans notre atmosph\u00e8re pendant la journ\u00e9e, entra\u00eenant des r\u00e9actions chimiques complexes qui se poursuivent la nuit, avec parfois production de lumi\u00e8re, un ph\u00e9nom\u00e8ne appel\u00e9 chimiluminescence.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/airglow.jpg\" rel=\"lightbox[4609]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4610\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/airglow-450x253.jpg\" alt=\"airglow\" width=\"450\" height=\"253\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/airglow-450x253.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/airglow-1024x576.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/12\/airglow.jpg 1100w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>L&#8217;astrophotographe <a href=\"https:\/\/500px.com\/ybeletsky\" target=\"_blank\">Yuri Beletsky<\/a> voit r\u00e9guli\u00e8rement la signature de l&#8217;<em>airglow<\/em> sur ses images sous forme de draperies lumineuses qui masquent les plus discr\u00e8tes <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/14\/la-nebuleuse-de-la-carene-une-immense-region-h-ii\/\" target=\"_blank\">n\u00e9buleuses<\/a>, une nouvelle forme de pollution lumineuse qui inqui\u00e8te les astronomes de l&#8217;<a href=\"https:\/\/www.eso.org\/public\/france\/\" target=\"_blank\">ESO<\/a> : ces derniers sont en effet install\u00e9s dans une zone o\u00f9 cette chimiluminescence est plus importante en raison d&#8217;une faiblesse du bouclier magn\u00e9tique terrestre connue sous le nom d&#8217;anomalie de l&#8217;Atlantique sud.<\/p>\n<p><!--more-->On a remarqu\u00e9 que l&#8217;<em>airglow<\/em> \u00e9tait devenu un ph\u00e9nom\u00e8ne beaucoup plus important depuis quelques ann\u00e9es. Les scientifiques expliquent cet accroissement par deux facteurs : d&#8217;une part le d\u00e9veloppement des capteurs photographiques de plus en plus sensibles (qui nous montrent d\u00e9sormais des spectacles c\u00e9lestes invisibles \u00e0 l&#8217;\u0153il nu sur de simples poses de quelques secondes), d&#8217;autre part le regain d&#8217;activit\u00e9 qu&#8217;a connu le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/14\/un-filament-circulaire-geant-sest-forme-sur-le-soleil\/\" target=\"_blank\">Soleil <\/a>ces derni\u00e8res ann\u00e9es.<\/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>M\u00eame quand on l&#8217;observe dans le d\u00e9sert, le ciel nocturne n&#8217;est jamais totalement noir. Le responsable est l&#8217;airglow, un ph\u00e9nom\u00e8ne de chimiluminescence. Depuis quelques ann\u00e9es les photographies de la vo\u00fbte c\u00e9leste montrent d&#8217;\u00e9tranges lueurs m\u00eame lorsqu&#8217;elles sont r\u00e9alis\u00e9es dans des sites exempts de toute pollution lumineuse, comme au pied du VLT dans le d\u00e9sert d&#8217;Atacama. &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/31\/en-video-lairglow-letrange-lumiere-du-ciel-nocturne\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">En vid\u00e9o : l&#8217;airglow, l&#8217;\u00e9trange lumi\u00e8re du ciel nocturne<\/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":4615,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[85],"tags":[1433,1434,634,633,1013,637,1016],"class_list":["post-4609","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-meteores","tag-airglow","tag-chimiluminescence","tag-desert-datacama","tag-eso","tag-video","tag-vlt","tag-yuri-beletsky"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>En vid\u00e9o : l&#039;airglow, l&#039;\u00e9trange lumi\u00e8re du ciel nocturne<\/title>\n<meta name=\"description\" content=\"M\u00eame quand on l&#039;observe dans le d\u00e9sert, le ciel nocturne n&#039;est jamais totalement noir. Le responsable est l&#039;airglow, un ph\u00e9nom\u00e8ne de chimiluminescence.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/31\/en-video-lairglow-letrange-lumiere-du-ciel-nocturne\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"En vid\u00e9o : l&#039;airglow, l&#039;\u00e9trange lumi\u00e8re du ciel nocturne\" \/>\n<meta property=\"og:description\" content=\"M\u00eame quand on l&#039;observe dans le d\u00e9sert, le ciel nocturne n&#039;est jamais totalement noir. 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