{"id":3566,"date":"2015-07-11T10:10:45","date_gmt":"2015-07-11T08:10:45","guid":{"rendered":"http:\/\/reperes-astro.fr\/?p=3566"},"modified":"2025-01-14T20:56:24","modified_gmt":"2025-01-14T19:56:24","slug":"encore-deux-jours-pour-mieux-connaitre-pluton-et-charon","status":"publish","type":"post","link":"https:\/\/reperes-astro.fr\/encore-deux-jours-pour-mieux-connaitre-pluton-et-charon\/","title":{"rendered":"Mieux conna\u00eetre PLUTON et CHARON"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540.png\"><img loading=\"lazy\" decoding=\"async\" width=\"541\" height=\"540\" src=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540.png\" alt=\"\" class=\"wp-image-3600\" title=\"nh-pluto-mountain-range-541x540\" srcset=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540.png 541w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540-300x300.png 300w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540-150x150.png 150w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540-80x80.png 80w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/nh-pluto-mountain-range-541x540-320x320.png 320w\" sizes=\"auto, (max-width: 541px) 100vw, 541px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>C&rsquo;est une image qui nous montre des montagnes. Des montagnes situ\u00e9es sur le bord de Tombaugh Regio, ainsi appel\u00e9 le c\u0153ur de Pluton. Des montagnes de glace faisant entre 800 et 1600 m\u00e8tres de hauteur. Des montagnes beaucoup plus petites <a href=\"http:\/\/www.journaldugeek.com\/2015\/07\/16\/salut-moi-cest-charon-ca-va\/\" target=\"_blank\" rel=\"noopener\">que celles photographi\u00e9es pr\u00e9c\u00e9demment.<\/a> Pour cela, la NASA estime que celles-ci sont beaucoup plus \u00e2g\u00e9es.<\/p>\n\n\n\n<p>De m\u00eame, la NASA estime que le noir pr\u00e9sent sur les photos repr\u00e9sente une r\u00e9gion qui pourrait avoir un milliard d\u2019ann\u00e9es. Au cas o\u00f9 vous poseriez la question, oui, c\u2019est vieux. Tr\u00e8s vieux, m\u00eame pour une formation g\u00e9ologique extraterrestre.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\"><strong>ARTICLES DE SPACE WEATHER<\/strong><\/h2>\n\n\n\n<p>Pluton a deux faces:<\/p>\n\n\n\n<p>la <strong>face visible<\/strong> que New Horizons va voir quand il fr\u00f4lera la plan\u00e8te naine le 14 Juillet<\/p>\n\n\n\n<p>La <strong>face cach\u00e9e<\/strong> qu&rsquo;il ne verra&nbsp; pas. A une distance de 2.5 millions de km,&nbsp; en a&nbsp; pris la meilleure image qu&rsquo; il ne prendra jamais de la face cach\u00e9e de Pluton.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/farside_strip.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"365\" src=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/farside_strip.jpg\" alt=\"\" class=\"wp-image-3577\" srcset=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/farside_strip.jpg 512w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/farside_strip-300x214.jpg 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p><\/p>\n\n\n\n<p>Un int\u00e9r\u00eat particulier sur la face cach\u00e9e est port\u00e9 sur\u00a0 quatre taches sombres connect\u00e9es \u00e0 une ceinture noire qui entoure la r\u00e9gion \u00e9quatoriale de Pluton. Les scientifiques sont surpris de leur taille similaire et m\u00eame espacement r\u00e9gulier.<\/p>\n\n\n\n<p>\u00ab\u00a0Il est \u00e9trange qu&rsquo;ils sont espac\u00e9s de fa\u00e7on r\u00e9guli\u00e8re\u00bb &#8211; \u00abNous ne pouvons pas dire si ce sont des plateaux ou des plaines, ou si elles sont des variations de luminosit\u00e9 sur une surface compl\u00e8tement lisse.\u00a0\u00bb&nbsp;&nbsp;&nbsp;&nbsp; Les taches apparaissent sur le c\u00f4t\u00e9 de Pluton qui toujours fait face \u00e0 sa plus grande lune, Charon.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\"><strong>Dans la matin\u00e9e du 14 Juillet, New Horizons passera environ 7,800 miles (12.500 kilom\u00e8tres) de la face visible .<\/strong><\/h2>\n\n\n\n<p class=\"has-medium-font-size\"><strong>PLUTON n\u2019est pas seul:<\/strong><\/p>\n\n\n\n<p>Pendant des ann\u00e9es, la plan\u00e8te \u00abnaine\u00bb a \u00e9t\u00e9 une t\u00e2che un peu floue dans les oculaires de t\u00e9lescopes. M\u00eame le t\u00e9lescope spatial Hubble ne pouvait le voir clairement.<\/p>\n\n\n\n<p>Ces temps sont r\u00e9volus.<\/p>\n\n\n\n<p>Le 7 Juillet, \u00ab&nbsp;Nouveaux Horizons&nbsp;\u00bb a pris cette image de Pluton et de &nbsp;sa lune Charon \u00e0 une distance de seulement 5 millions de miles.<\/p>\n\n\n\n<p>Ces images bien nettes r\u00e9v\u00e8lent de nombreuses diff\u00e9rences int\u00e9ressantes: Les mat\u00e9riaux rouge\u00e2tres sur Pluton semblent \u00eatre compl\u00e8tement absents sur Charon. Sur Charon, seule une r\u00e9gion polaire noire interrompt le terrain gris clair.<\/p>\n\n\n\n<p>\u00ab\u00a0Ces deux objets ont \u00e9t\u00e9 ensemble pendant des milliards d&rsquo;ann\u00e9es, dans la m\u00eame orbite, mais ils sont totalement diff\u00e9rents\u00bb, explique Alan Stern du Southwest Research Institute (SwRI) \u00e0 Boulder, Colorado. Stern est le chercheur principal de la mission New Horizons.<\/p>\n\n\n\n<p>Charon est \u00e0 environ1200 km, soit environ la moiti\u00e9 du diam\u00e8tre de Pluton &#8211; ce qui en fait la plus grande lune relative du syst\u00e8me solaire \u00e0 sa plan\u00e8te.<\/p>\n\n\n\n<p>Le 14 Juillet, lorsque New Horizons sera au plus proche du syst\u00e8me Pluton-Charon, les images qu&rsquo;il transmettra seront 500 fois plus pr\u00e9cises\u2026<\/p>\n\n\n\n<p>Restez \u00e0 l&rsquo;\u00e9coute!<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/pluto_strip.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"253\" src=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/pluto_strip.jpg\" alt=\"\" class=\"wp-image-3567\" title=\"pluto_strip\" srcset=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/pluto_strip.jpg 512w, https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/uploads\/2015\/07\/pluto_strip-300x148.jpg 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p><\/p>\n<div class=\"pvc_clear\"><\/div><p id=\"pvc_stats_3566\" class=\"pvc_stats all  \" data-element-id=\"3566\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p><div class=\"pvc_clear\"><\/div>","protected":false},"excerpt":{"rendered":"<p>C&rsquo;est une image qui nous montre des montagnes. Des montagnes situ\u00e9es sur le bord de Tombaugh Regio, ainsi appel\u00e9 le c\u0153ur&#46;&#46;&#46;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_3566\" class=\"pvc_stats all  \" data-element-id=\"3566\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/reperes-astro.fr\/%77%70%2d%63%6f%6e%74%65%6e%74\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":2,"featured_media":3567,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106,102,54],"tags":[],"class_list":["post-3566","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archives-reperes-astro-2015","category-archives-reperes-astro","category-planetes"],"yoast_head":"<title>Mieux conna\u00eetre PLUTON et CHARON - Rep\u00e8res Astro<\/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:\/\/reperes-astro.fr\/encore-deux-jours-pour-mieux-connaitre-pluton-et-charon\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mieux conna\u00eetre PLUTON et CHARON - Rep\u00e8res Astro\" \/>\n<meta property=\"og:description\" content=\"C&rsquo;est une image qui nous montre des montagnes. 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