{"id":1334,"date":"2014-12-08T14:23:22","date_gmt":"2014-12-08T14:23:22","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1334"},"modified":"2014-12-11T11:31:47","modified_gmt":"2014-12-11T11:31:47","slug":"saturne-dans-lombre-des-anneaux","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/","title":{"rendered":"Saturne dans l’ombre des anneaux"},"content":{"rendered":"

Saturne <\/a>est la sixi\u00e8me plan\u00e8te du Syst\u00e8me solaire en partant du Soleil<\/a>, la seconde par la taille apr\u00e8s Jupiter <\/a>(ces deux plan\u00e8tes sont des g\u00e9antes gazeuses). Mais ce sont ses anneaux qui rendent la plan\u00e8te Saturne fascinante.<\/p>\n

Galil\u00e9e les d\u00e9couvre en 1610 \u00e0 l’aide de sa petite lunette astronomique<\/a> mais ne comprend pas ce dont il s’agit. Christian Huygens suppose le premier en 1654 que Saturne est une plan\u00e8te entour\u00e9e par des anneaux, et 20 ans plus tard Jean Dominique Cassini imagine que ces anneaux sont constitu\u00e9s d’une multitude de petits corps en orbite autour de la plan\u00e8te.<\/p>\n

En hommage \u00e0 ces deux scientifiques, on a surnomm\u00e9 Cassini <\/a>l\u2019orbiteur qui survole Saturne et ses satellites depuis 2004, et Huygens la sonde qui s\u2019est pos\u00e9e sur le satellite Titan <\/a>en janvier 2005.<\/p>\n

\"saturne2\"<\/a><\/p>\n

La sonde Cassini a r\u00e9alis\u00e9 cette image au mois d’ao\u00fbt dernier, alors qu’elle se trouvait \u00e0 1,7 million de kilom\u00e8tres de Saturne (la r\u00e9solution est de 102 km par pixel). Le satellite T\u00e9thys est visible en bas \u00e0 droite.<\/p>\n

Contrairement \u00e0 ce que pourrait laisser penser ce clich\u00e9, la r\u00e9gion du p\u00f4le sud de Saturne (en bas \u00e0 gauche) n’est pas entour\u00e9e de bandes. Il s’agit seulement de l’ombre des anneaux \u00e9clair\u00e9s par le Soleil qui se projette sur cet h\u00e9misph\u00e8re. Quant aux anneaux eux-m\u00eame, ils sont visibles de profil sous la forme d’une mince bande lumineuse au niveau de l’\u00e9quateur de Saturne.<\/p>\n","protected":false},"excerpt":{"rendered":"

Saturne est la sixi\u00e8me plan\u00e8te du Syst\u00e8me solaire en partant du Soleil, la seconde par la taille apr\u00e8s Jupiter (ces deux plan\u00e8tes sont des g\u00e9antes gazeuses). Mais ce sont ses anneaux qui rendent la plan\u00e8te Saturne fascinante. Galil\u00e9e les d\u00e9couvre en 1610 \u00e0 l’aide de sa petite lunette astronomique mais ne comprend pas ce dont … Continuer la lecture de Saturne dans l’ombre des anneaux<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":1335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[622,569,158,621,90,148,570,534,568,136,97,623,624],"class_list":["post-1334","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-anneau","tag-christian-huygens","tag-galilee","tag-jean-dominique-cassini","tag-jupiter","tag-lunette-astronomique","tag-mission-cassini-huygens","tag-orbiteur","tag-satellite","tag-saturne","tag-soleil","tag-sonde","tag-tethys"],"yoast_head":"\nsaturne anneau<\/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\/08\/saturne-dans-lombre-des-anneaux\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"saturne anneau\" \/>\n<meta property=\"og:description\" content=\"Saturne est la sixi\u00e8me plan\u00e8te du Syst\u00e8me solaire en partant du Soleil, la seconde par la taille apr\u00e8s Jupiter (ces deux plan\u00e8tes sont des g\u00e9antes gazeuses). Mais ce sont ses anneaux qui rendent la plan\u00e8te Saturne fascinante. Galil\u00e9e les d\u00e9couvre en 1610 \u00e0 l’aide de sa petite lunette astronomique mais ne comprend pas ce dont … Continuer la lecture de Saturne dans l’ombre des anneaux →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2014-12-08T14:23:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2014-12-11T11:31:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/saturne2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"946\" \/>\n\t<meta property=\"og:image:height\" content=\"946\" \/>\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\/08\/saturne-dans-lombre-des-anneaux\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/\",\"name\":\"saturne anneau\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/saturne2.jpg\",\"datePublished\":\"2014-12-08T14:23:22+00:00\",\"dateModified\":\"2014-12-11T11:31:47+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\/08\/saturne-dans-lombre-des-anneaux\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/08\/saturne-dans-lombre-des-anneaux\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/saturne2.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/12\/saturne2.jpg\",\"width\":946,\"height\":946,\"caption\":\"Saturne dans l'ombre des anneaux\"},{\"@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\":\""J'ai en moi un besoin terrible. 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