{"id":5398,"date":"2016-04-06T16:01:06","date_gmt":"2016-04-06T16:01:06","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=5398"},"modified":"2016-04-17T13:29:34","modified_gmt":"2016-04-17T13:29:34","slug":"video-lumiere-zodiacale-desert-datacama","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/04\/06\/video-lumiere-zodiacale-desert-datacama\/","title":{"rendered":"En vid\u00e9o : la lumi\u00e8re zodiacale dans le d\u00e9sert d&#8217;Atacama"},"content":{"rendered":"<p><strong>Une nouvelle vid\u00e9o propos\u00e9e par l&#8217;ESO nous explique ce qu&#8217;est la lumi\u00e8re zodiacale, cette faible lueur qui se r\u00e9v\u00e8le sous le ciel noir du d\u00e9sert d&#8217;Atacama.\u00a0<\/strong><\/p>\n<p>L&#8217;observation de la lumi\u00e8re zodiacale remonte fort loin ; \u00a0le savant et po\u00e8te persan Omar Khayyam, qui v\u00e9cut au XI\u00e8me si\u00e8cle, l&#8217;avait surnomm\u00e9e la main gauche de l&#8217;aube. On l&#8217;appelle aussi fausse aurore, tant sa forme triangulaire point\u00e9e vers le z\u00e9nith en fin de nuit peut cr\u00e9er la confusion avec l&#8217;aube naissante. Mais le ph\u00e9nom\u00e8ne est observable \u00e9galement le soir :<\/p>\n<p><em>Avant d&#8217;aller dormir, nous avons fait ensemble quelques pas sur le sentier qui conduit au cimeti\u00e8re&#8230; Maman a dit : &#8220;Cette clart\u00e9 du ciel est la lumi\u00e8re zodiacale, l&#8217;\u00e9t\u00e9 sera long et chaud&#8221;.<\/em> (extrait de l&#8217;\u00c2me de l&#8217;\u00e9pervier de Jean Carri\u00e8re).<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/eoFn_YLqFpQ\" frameborder=\"0\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>La lumi\u00e8re zodiacale est la diffusion de la lumi\u00e8re solaire par la poussi\u00e8re interplan\u00e9taire constitu\u00e9e de minuscules grains de glace et de poussi\u00e8re abandonn\u00e9s par les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/03\/25\/printemps-1996-la-comete-hyakutake-fait-le-spectacle\/\" target=\"_blank\">com\u00e8tes<\/a>. Ces particules se concentrent principalement dans le plan de l&#8217;\u00e9cliptique, une bande c\u00e9leste o\u00f9 l&#8217;on trouve le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/15\/dans-la-mer-le-soleil-est-encore-plus-beau\/\" target=\"_blank\">Soleil<\/a>, la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/03\/15\/lundi-14-mars-la-lune-passe-devant-lamas-des-hyades\/\" target=\"_blank\">Lune<\/a>, les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/31\/festival-de-planetes-dans-le-ciel-du-haut-beaujolais\/\" target=\"_blank\">plan\u00e8tes<\/a> et les constellations du zodiaque, d&#8217;o\u00f9 son nom.<!--more--><\/p>\n<p>Ce sont les astronomes Jean-Dominique Cassini en France et Nicolas Fatio de Duillier en Suisse qui furent les premiers \u00e0 s&#8217;y int\u00e9resser \u00e0 la fin du XIV\u00e8me si\u00e8cle et on pouvait l&#8217;observer tout au long de l&#8217;ann\u00e9e en d\u00e9but ou en fin de nuit jusqu&#8217;\u00e0 l&#8217;invasion de l&#8217;\u00e9clairage nocturne au cours du XX\u00e8me si\u00e8cle.<\/p>\n<p>Sans aucune <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/06\/28\/pollution-lumineuse\/\" target=\"_blank\">pollution lumineuse<\/a>, le d\u00e9sert de l&#8217;Atacama (dans les Andes chiliennes, l\u00e0 o\u00f9 sont implant\u00e9s les t\u00e9lescopes de l&#8217;<a href=\"https:\/\/www.eso.org\/public\/france\/\" target=\"_blank\">ESO<\/a>) est un endroit id\u00e9al pour admirer cette lueur tout comme \u00e0 l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/21\/la-lumiere-zodiacale-en-majeste-sur-le-mauna-kea\/\" target=\"_blank\">observatoire du Mauna Kea<\/a> sur l&#8217;\u00eele d&#8217;Hawaii. Un ph\u00e9nom\u00e8ne qui existe ailleurs que dans notre Syst\u00e8me solaire : le VLT est en effet parvenu \u00e0 d\u00e9tecter<a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/exoplanetes-lumiere-exozodiacale-autre-systeme-planetaire-55893\/\" target=\"_blank\"> la lumi\u00e8re exozodiacale d&#8217;un autre syst\u00e8me plan\u00e9taire<\/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>Une nouvelle vid\u00e9o propos\u00e9e par l&#8217;ESO nous explique ce qu&#8217;est la lumi\u00e8re zodiacale, cette faible lueur qui se r\u00e9v\u00e8le sous le ciel noir du d\u00e9sert d&#8217;Atacama.\u00a0 L&#8217;observation de la lumi\u00e8re zodiacale remonte fort loin ; \u00a0le savant et po\u00e8te persan Omar Khayyam, qui v\u00e9cut au XI\u00e8me si\u00e8cle, l&#8217;avait surnomm\u00e9e la main gauche de l&#8217;aube. On &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/04\/06\/video-lumiere-zodiacale-desert-datacama\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">En vid\u00e9o : la lumi\u00e8re zodiacale dans le d\u00e9sert d&#8217;Atacama<\/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":5399,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[634,633,621,1578,829,1577,1575,1013],"class_list":["post-5398","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-desert-datacama","tag-eso","tag-jean-dominique-cassini","tag-lumiere-exozodiacale","tag-lumiere-zodiacale","tag-nicolas-fatio-de-duillier","tag-omar-khayyam","tag-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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