{"id":11671,"date":"2016-04-13T00:00:06","date_gmt":"2016-04-12T22:00:06","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=11671"},"modified":"2016-04-03T17:24:01","modified_gmt":"2016-04-03T15:24:01","slug":"le-systeme-solaire-une-neuvieme-planete","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/le-systeme-solaire-une-neuvieme-planete\/","title":{"rendered":"Le syst\u00e8me solaire : Une neuvi\u00e8me plan\u00e8te"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p style=\"text-align: justify;\">Le syst\u00e8me solaire comprend le Soleil et tous les objets plus petits qui tournent autour de lui. \u00c0 part le Soleil, les plus gros objets du syst\u00e8me solaire sont les huit grandes plan\u00e8tes.<\/p>\n<p style=\"text-align: justify;\">Les plus proches du Soleil sont les quatre plan\u00e8tes rocheuses, relativement petites : Mercure, V\u00e9nus, la Terre et Mars. Au-del\u00e0 de Mars et Jupiter se trouve la ceinture d&rsquo;ast\u00e9ro\u00efdes \u2013 une r\u00e9gion peupl\u00e9e de millions de cailloux. Ce sont les restes de la formation des plan\u00e8tes il y a 4,5 milliards d&rsquo;ann\u00e9es.<\/p>\n<p style=\"text-align: justify;\">A l\u2019extr\u00e9mit\u00e9 de la ceinture d&rsquo;ast\u00e9ro\u00efdes se trouvent les quatre g\u00e9antes gazeuses que sont Jupiter, Saturne, Uranus et Neptune. Ces plan\u00e8tes sont bien plus grosses que la Terre mais tr\u00e8s l\u00e9g\u00e8res par rapport \u00e0 leur taille. Elles sont essentiellement form\u00e9es d&rsquo;hydrog\u00e8ne et d&rsquo;h\u00e9lium.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/RTuykTWGEm8?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=fr-FR&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p style=\"text-align: justify;\">La plan\u00e8te la plus \u00e9loign\u00e9e que nous connaissions jusqu&rsquo;\u00e0 r\u00e9cemment \u00e9tait un corps glac\u00e9 appel\u00e9 Pluton. Toutefois, Pluton est \u00e9clips\u00e9e par la lune de la Terre et certains astronomes pensent qu&rsquo;elle est trop petite pour \u00eatre consid\u00e9r\u00e9e comme une vraie plan\u00e8te. Un objet appel\u00e9 Eris, au moins aussi gros que Pluton, a \u00e9t\u00e9 d\u00e9couvert tr\u00e8s loin du Soleil en 2005.<\/p>\n<p style=\"text-align: justify;\">Ces derni\u00e8res ann\u00e9es, plus de 1000 corps glac\u00e9s ont \u00e9t\u00e9 d\u00e9couverts au-del\u00e0 de Pluton. On les appelle les objets de la ceinture de Kuiper. En 2006, L\u2019Union astronomique internationale les a class\u00e9s dans la cat\u00e9gories de \u00ab plan\u00e8tes naines \u00bb.<\/p>\n<p style=\"text-align: justify;\">Plus loin encore, on trouve les com\u00e8tes du nuage d&rsquo;Oort. Elles sont tellement loin qu&rsquo;on ne peut pas les voir, m\u00eame avec les plus gros t\u00e9lescopes. De temps \u00e0 autre, l&rsquo;une de ces com\u00e8tes est d\u00e9rang\u00e9e et se dirige vers le Soleil. Elle devient alors visible la nuit dans le ciel.<\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"11671\">(608)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Le syst\u00e8me solaire comprend le Soleil et tous les objets plus petits qui tournent autour de lui. \u00c0 part le&#8230;<\/p>\n","protected":false},"author":1,"featured_media":10515,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Le syst\u00e8me solaire : Une neuvi\u00e8me plan\u00e8te @laterredufutur","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[22],"tags":[915,124,5710,121,1627,1628,363],"class_list":["post-11671","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-documentaire","tag-jupiter","tag-neptune","tag-planete","tag-pluton","tag-saturne","tag-systeme-solaire","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/pluton-ciel-bleu-glace-nasa-1.jpg?fit=648%2C415&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-32f","jetpack-related-posts":[{"id":21741,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-astronomes-viennent-de-trouver-des-autoroutes-cosmiques-pour-voyager-rapidement-a-travers-le-systeme-solaire\/","url_meta":{"origin":11671,"position":0},"title":"Les astronomes viennent de trouver des \u00ab\u00a0autoroutes\u00a0\u00bb cosmiques pour voyager rapidement \u00e0 travers le syst\u00e8me solaire","author":"Admin","date":"18 d\u00e9cembre 2020","format":false,"excerpt":"Les structures invisibles g\u00e9n\u00e9r\u00e9es par les interactions gravitationnelles dans le syst\u00e8me solaire ont cr\u00e9\u00e9 un r\u00e9seau \u00abd'autoroute spatiale\u00bb, ont d\u00e9couvert les astronomes. Ces canaux permettent le voyage rapide d'objets dans l'espace et pourraient \u00eatre exploit\u00e9s \u00e0 nos propres fins d'exploration spatiale, ainsi que pour l'\u00e9tude des com\u00e8tes et des ast\u00e9ro\u00efdes.\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/12\/autoroute-celeste-systeme-solaire.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/12\/autoroute-celeste-systeme-solaire.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/12\/autoroute-celeste-systeme-solaire.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/12\/autoroute-celeste-systeme-solaire.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":24007,"url":"https:\/\/www.laterredufutur.com\/accueil\/objectif-uranus\/","url_meta":{"origin":11671,"position":1},"title":"Objectif Uranus","author":"Admin","date":"2 mai 2022","format":false,"excerpt":"Le 19 avril 2022, les Acad\u00e9mies am\u00e9ricaines des sciences, de l\u2019ing\u00e9nierie et de la m\u00e9decine ont publi\u00e9 un imposant rapport de pr\u00e8s de 800 pages sur les explorations plan\u00e9taires \u00e0 mener dans les dix ans \u00e0 venir. Elles estiment que, en plus de la mission de retour d\u2019\u00e9chantillons martiens, priorit\u00e9\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus.jpg?fit=1200%2C705&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus.jpg?fit=1200%2C705&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus.jpg?fit=1200%2C705&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus.jpg?fit=1200%2C705&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus.jpg?fit=1200%2C705&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":8522,"url":"https:\/\/www.laterredufutur.com\/accueil\/apres-mars-et-pluton-en-route-pour-venus\/","url_meta":{"origin":11671,"position":2},"title":"Apr\u00e8s Mars et Pluton, en route pour V\u00e9nus","author":"Admin","date":"3 octobre 2015","format":false,"excerpt":"La voisine de la Terre est l\u2019objectif de deux des cinq missions pressenties pour \u00eatre lanc\u00e9es par l\u2019agence spatiale am\u00e9ricaine la NASA. Objectif V\u00e9nus. La Nasa a d\u00e9voil\u00e9 mercredi soir la liste des cinq projets d\u2019exploration spatiale pressentis pour \u00eatre financ\u00e9s et concr\u00e9tis\u00e9s, dont deux concernent notre voisine. Chacun va\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/10\/super-terre-venus.jpg?fit=1200%2C769&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":1270,"url":"https:\/\/www.laterredufutur.com\/accueil\/rechauffement-du-systeme-solaire\/","url_meta":{"origin":11671,"position":3},"title":"R\u00e9chauffement du syst\u00e8me solaire","author":"Admin","date":"3 mars 2013","format":false,"excerpt":"Les humains pourraient-ils \u00eatre responsables des changements climatiques sur les autres plan\u00e8tes du syst\u00e8me solaire, ou le soleil en serait-il le grand responsable ? Ce qui suit n'enl\u00e8ve en rien de la responsabilit\u00e9 de l'Homme sur le Climat et l'Environnement de notre bonne vieille Terre. L'Homme reste responsable de la\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2013\/03\/laterredufutur.com_spaw_images_systemesolaire.jpg?fit=430%2C282&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":26733,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-nouvelle-theorie-explique-comment-la-terre-primitive-est-devenue-si-humide\/","url_meta":{"origin":11671,"position":4},"title":"Une nouvelle th\u00e9orie explique comment la Terre primitive est devenue si humide","author":"Admin","date":"3 mars 2025","format":false,"excerpt":"Lorsque la Terre s'est form\u00e9e, elle \u00e9tait trop chaude pour retenir la glace. Cela signifie que toute l'eau pr\u00e9sente sur notre plan\u00e8te doit provenir de sources extraterrestres. Des \u00e9tudes men\u00e9es sur d'anciennes roches terrestres sugg\u00e8rent que de l'eau liquide existait sur Terre d\u00e8s 100 millions d'ann\u00e9es apr\u00e8s la formation du\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/03\/pluies.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/03\/pluies.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/03\/pluies.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/03\/pluies.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23618,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-soleil-avait-des-anneaux-semblables-a-ceux-de-saturne\/","url_meta":{"origin":11671,"position":5},"title":"Le Soleil avait des anneaux semblables \u00e0 ceux de Saturne","author":"Admin","date":"9 janvier 2022","format":false,"excerpt":"Selon une nouvelle \u00e9tude, avant que la Terre et les autres plan\u00e8tes de notre syst\u00e8me solaire n'existent, le Soleil \u00e9tait peut-\u00eatre entour\u00e9 d'anneaux g\u00e9ants de poussi\u00e8re semblables \u00e0 ceux de Saturne. Ces anneaux de poussi\u00e8re ont peut-\u00eatre emp\u00each\u00e9 la Terre de devenir une \"super-Terre\" - un type de plan\u00e8te qui\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/soleil-et-supers-anneaux.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/soleil-et-supers-anneaux.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/soleil-et-supers-anneaux.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/soleil-et-supers-anneaux.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/11671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=11671"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/11671\/revisions"}],"predecessor-version":[{"id":11672,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/11671\/revisions\/11672"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/10515"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=11671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=11671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=11671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}