{"id":1310,"date":"2014-12-14T13:18:13","date_gmt":"2014-12-14T13:18:13","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1310"},"modified":"2014-12-22T07:30:31","modified_gmt":"2014-12-22T07:30:31","slug":"lumiere-rouge-les-astronomes","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/","title":{"rendered":"Lumi\u00e8re rouge pour les astronomes"},"content":{"rendered":"<p>Vous avez peut-\u00eatre remarqu\u00e9 que les observateurs nocturnes utilisent une lumi\u00e8re rouge pour \u00e9clairer cartes c\u00e9lestes et <a title=\"En images : les t\u00e9lescopes des amateurs\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/14\/en-images-les-telescopes-amateurs\/\" target=\"_blank\">instruments astronomiques<\/a>. Savez-vous pourquoi ?<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg\" rel=\"lightbox[1310]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1311\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353-450x337.jpg\" alt=\"DSCF6353\" width=\"450\" height=\"337\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353-450x337.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg 1199w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Lorsqu&#8217;on observe la nuit, on cherche \u00e0 optimiser au maximum les capacit\u00e9s oculaires de fa\u00e7on \u00e0 percevoir des astres peu lumineux (<a title=\"La galaxie d\u2019Androm\u00e8de\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/26\/galaxie-dandromede\/\" target=\"_blank\">galaxies<\/a>, <a title=\"La com\u00e8te Hyakutake au printemps 1996\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/04\/comete-hyakutake-au-printemps-1996\/\" target=\"_blank\">com\u00e8tes <\/a>&#8230;ou tout astre de faible magnitude).<\/p>\n<p><!--more-->En passant plusieurs dizaines de minutes dans le noir notre pupille se dilate et les b\u00e2tonnets (les cellules les plus sensibles) qui tapissent le fond de notre r\u00e9tine se mettent en action \u00e0 la place des c\u00f4nes qui nous servent en vision diurne.<\/p>\n<p>Malheureusement tout \u00e9clairage violent annule instantan\u00e9ment cette adaptation oculaire. Comme on a parfois besoin d&#8217;un peu de lumi\u00e8re, on choisit un \u00e9clairage rouge car les b\u00e2tonnets sont insensibles \u00e0 cette couleur.<\/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>Vous avez peut-\u00eatre remarqu\u00e9 que les observateurs nocturnes utilisent une lumi\u00e8re rouge pour \u00e9clairer cartes c\u00e9lestes et instruments astronomiques. Savez-vous pourquoi ? Lorsqu&#8217;on observe la nuit, on cherche \u00e0 optimiser au maximum les capacit\u00e9s oculaires de fa\u00e7on \u00e0 percevoir des astres peu lumineux (galaxies, com\u00e8tes &#8230;ou tout astre de faible magnitude).<!-- 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":1311,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[94,539,614,93,613,616,112,192,615,612,540],"class_list":["post-1310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-astronome","tag-batonnet","tag-carte-celeste","tag-comete","tag-cone","tag-diurne","tag-galaxie","tag-magnitude","tag-nocturne","tag-pupille","tag-retine"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>lumiere rouge<\/title>\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\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"lumiere rouge\" \/>\n<meta property=\"og:description\" content=\"Vous avez peut-\u00eatre remarqu\u00e9 que les observateurs nocturnes utilisent une lumi\u00e8re rouge pour \u00e9clairer cartes c\u00e9lestes et instruments astronomiques. Savez-vous pourquoi ? Lorsqu&#8217;on observe la nuit, on cherche \u00e0 optimiser au maximum les capacit\u00e9s oculaires de fa\u00e7on \u00e0 percevoir des astres peu lumineux (galaxies, com\u00e8tes &#8230;ou tout astre de faible magnitude).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2014-12-14T13:18:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-12-22T07:30:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1199\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\",\"name\":\"lumiere rouge\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg\",\"datePublished\":\"2014-12-14T13:18:13+00:00\",\"dateModified\":\"2014-12-22T07:30:31+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/DSCF6353.jpg\",\"width\":1199,\"height\":900},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\"&quot;J&#039;ai en moi un besoin terrible. 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