{"id":11168,"date":"2021-09-27T16:33:46","date_gmt":"2021-09-27T16:33:46","guid":{"rendered":"https:\/\/snipool.com\/?p=11168"},"modified":"2021-09-27T16:33:46","modified_gmt":"2021-09-27T16:33:46","slug":"les-satelites-des-planetes","status":"publish","type":"post","link":"https:\/\/snipool.com\/fr\/les-satelites-des-planetes\/","title":{"rendered":"Les satelites des plan\u00e8tes"},"content":{"rendered":"<p>Les satelites ou les lunes (en r\u00e9f\u00e9rance \u00e0 notre Lune) sont des corps c\u00e9lestes gravitants autour d\u2019une plan\u00e8te. Ils tournent autour de presque toutes les plan\u00e8tes de notre syst\u00e8me solaire. Les satellites sont \u00a0faits de roches, de roches couverts de glace ou de roche et glace. Beaucoup entre eux sont couverts de crat\u00e8res form\u00e9s apr\u00e8s l\u2019\u00e9crasement des m\u00e9t\u00e9orites sur leur surface.<\/p>\n<p>En 1610, Galileo Galilei, dit Galil\u00e9e (1564- 1642), astronome, math\u00e9maticien et physicien italien decouvrit les tout premiers satelites. Il costruisit une lunette astronomique, un long tube muni de lentilles de verre, avec laquelle il observa le Soleil, Jupiter et Saturne. Il remarqua la pr\u00e9sence de quatre gros satelites autour de Jupiter. Plus tard, on a baptis\u00e9 les quatres lunes de cette plan\u00e8te Io, Europe, Galym\u00e8de et Callisto.<\/p>\n<p>Aujourd\u2019hui on compte 99 Lunes\u00a0: la Terre a une,\u00a0Mars a deux, Uranus a 21, Jupiter poss\u00e8de 30, Saturne 36, on connait 8 satellites de Neptune, Pluton en poss\u00e8de qu\u2019un. Mercure et V\u00e9nus n\u2019ont pas de lunes.<\/p>\n<p>Le plus gros satellite est celui de Jupiter, Ganym\u00e8de avec ces 5 276 km de diam\u00e8tre.<\/p>\n<p>Les plus petits lunes tournent autour de Jupiter, de Saturne et d\u2019Uranus. Elle mesurent moins de 10 km de diam\u00e8tre.<\/p>\n<p>La plus proche lune, qui gravite \u00e0 seulement 9 000 km de sa plan\u00e8te Mars, est Phobos.<\/p>\n<p>La plus froide lune que nous connaissons jusqu\u2019\u00e0 pr\u00e9sent, Triton, tourne autour de Neptune. Il y fait 235<sup>0 <\/sup>C au- dessous de z\u00e9ro. Triton est ainsi la plus grande lune de Neptune. Elle a la surface completement glac\u00e9e. Mais sur les images prises par la sonde Voyager 2, on a d\u00e9couvert des sortes de geysers de glace, r\u00e9v\u00e9l\u00e9s par des tra\u00een\u00e9es noires.<\/p>\n<p>Le satellite le plus cass\u00e9 qui gravite autour de sa plan\u00e8te, Uranus, est Miranda. Elle semble \u00eatre fait de morceaux recoll\u00e9s et on pense que cette lune a \u00e9t\u00e9 fracass\u00e9e plusieurs fois \u00e0 la suite de collisions avec d\u2019autres corps c\u00e9lestes.<\/p>\n<p>L\u2019une des plus \u00e9tonnantes lunes sont Europe et Ganym\u00e8de. Elles gravitent autour de Jupiter et cacheraient sous leur cro\u00fbte de glace un gigantesque oc\u00e9an. Io, une autre lune de Jupiter, a \u00e9t\u00e9 observ\u00e9 par les sondes Voyager et Galileo. Les images prises par les sondes, montrent Io cribl\u00e9 de centaines de volcans aux couleurs blanc jaune, dont beuacoup sont en activit\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les satelites ou les lunes (en r\u00e9f\u00e9rance \u00e0 notre Lune) sont des corps c\u00e9lestes gravitants autour d\u2019une plan\u00e8te. Ils tournent autour de presque toutes les plan\u00e8tes de notre syst\u00e8me solaire. Les satellites sont \u00a0faits de roches, de roches couverts de glace ou de roche et glace. Beaucoup entre eux sont couverts de crat\u00e8res form\u00e9s apr\u00e8s &hellip;<\/p>\n","protected":false},"author":1,"featured_media":11169,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1089],"tags":[1319,3105,2819,3104,3106,3107,2817,2815],"class_list":["post-11168","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-le-monde","tag-europe","tag-galileo-galilei","tag-jupiter","tag-mars","tag-neptune","tag-triton","tag-uranus","tag-voyager"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les satelites des plan\u00e8tes - Snipool<\/title>\n<meta name=\"description\" content=\"Les satelites ou les lunes (en r\u00e9f\u00e9rance \u00e0 notre Lune) sont des corps c\u00e9lestes gravitants autour d\u2019une plan\u00e8te.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/snipool.com\/fr\/les-satelites-des-planetes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les satelites des plan\u00e8tes - 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