{"id":6494,"date":"2016-10-12T05:05:43","date_gmt":"2016-10-12T05:05:43","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6494"},"modified":"2016-10-24T07:15:19","modified_gmt":"2016-10-24T07:15:19","slug":"vignes-aux-couleurs-de-lautomne-liss","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/10\/12\/vignes-aux-couleurs-de-lautomne-liss\/","title":{"rendered":"Des vignes aux couleurs de l&#8217;automne sous l&#8217;ISS"},"content":{"rendered":"<p><strong>Le 11 octobre en d\u00e9but de soir\u00e9e la Station spatiale internationale (ISS) \u00e9tait visible en Bourgogne au-dessus des vignes aux couleurs d&#8217;automne.<\/strong><\/p>\n<p>Cela ne vous a pas \u00e9chapp\u00e9 : nous sommes en automne depuis le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/09\/21\/changement-de-saison-22-septembre-jour-de-lequinoxe\/\" target=\"_blank\">22 septembre, jour de l&#8217;\u00e9quinoxe<\/a>. Les journ\u00e9es continuent de raccourcir et les nuits sont plus longues et plus fra\u00eeches. L&#8217;automne est sans doute la plus belle saison en Bourgogne, quand les feuilles de vignes se parent de mille couleurs apr\u00e8s les vendanges. Pourquoi ce festival de couleurs ? Tout simplement parce que la chlorophylle (qui donne aux feuilles leur couleur verte l&#8217;\u00e9t\u00e9) cesse d&#8217;\u00eatre produite lorsque les jours raccourcissent, laissant la place \u00e0 d&#8217;autres pigments, principalement du jaune produit par des\u00a0flavono\u00efdes et de l&#8217;orange lib\u00e9r\u00e9 par les carot\u00e9no\u00efdes.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne.jpg\" rel=\"lightbox[6494]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6495\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne-450x270.jpg\" alt=\"iss_automne\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/10\/iss_automne.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Le 11 octobre en d\u00e9but de soir\u00e9e la Station spatiale internationale (dont c&#8217;est actuellement l&#8217;<a href=\"https:\/\/www.nasa.gov\/mission_pages\/station\/expeditions\/expedition49\/index.html\" target=\"_blank\">exp\u00e9dition 49<\/a>) a eu la bonne id\u00e9e de faire une apparition au-dessus des vignes du c\u00f4t\u00e9 de la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/10\/10\/constellation-grande-ourse\/\" target=\"_blank\">constellation de la Grande Ourse<\/a> (pos\u00e9e sur l&#8217;horizon NORD-OUEST) puis de traverser le ciel en fr\u00f4lant l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/31\/astuce-comment-reperer-la-celebre-etoile-polaire\/\" target=\"_blank\">\u00e9toile polaire<\/a>, un passage annonc\u00e9\u00a0 comme d&#8217;habitude sur <a href=\"http:\/\/www.heavens-above.com\/\" target=\"_blank\">Heavens-Above<\/a>. Le clich\u00e9 ci-dessus est l&#8217;addition de 5 poses de 30 secondes \u00e0 800 iso avec un objectif Samyang de 8 millim\u00e8tres de focale (m\u00eame pris \u00e0 la suite les 5 clich\u00e9s montrent des coupures dans la trace lumineuse laiss\u00e9e par l&#8217;ISS en mouvement).<!--more--><\/p>\n<p>La Station spatiale internationale (<a href=\"https:\/\/www.nasa.gov\/mission_pages\/station\/main\/index.html\" target=\"_blank\"><em>International Space Station<\/em><\/a> ou ISS) est une structure artificielle qui mesure 110 m\u00e8tres de long pour 74 de large. Elle fait un tour de la Terre environ toutes les 90 minutes \u00e0 400 kilom\u00e8tres d\u2019altitude. Pr\u00e8s de 2.500 m\u00e8tres carr\u00e9s de panneaux solaires fournissent l\u2019\u00e9lectricit\u00e9 de la Station et r\u00e9fl\u00e9chissent la lumi\u00e8re solaire, <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/07\/6-fevrier-iss-traverse-le-ciel-au-crepuscule\/\" target=\"_blank\">ce qui permet de suivre les passages de l\u2019ISS dans le ciel nocturne<\/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 11 octobre en d\u00e9but de soir\u00e9e la Station spatiale internationale (ISS) \u00e9tait visible en Bourgogne au-dessus des vignes aux couleurs d&#8217;automne. Cela ne vous a pas \u00e9chapp\u00e9 : nous sommes en automne depuis le 22 septembre, jour de l&#8217;\u00e9quinoxe. Les journ\u00e9es continuent de raccourcir et les nuits sont plus longues et plus fra\u00eeches. L&#8217;automne &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/10\/12\/vignes-aux-couleurs-de-lautomne-liss\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Des vignes aux couleurs de l&#8217;automne sous l&#8217;ISS<\/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":6495,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[418,455,456,98,1873,308,196,197,206],"class_list":["post-6494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-automne","tag-chlorophylle","tag-constellation-de-la-grande-ourse","tag-etoile-polaire","tag-expedition-49","tag-heavens-above","tag-iss","tag-station-spatiale-internationale","tag-vigne"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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