{"id":5703,"date":"2011-02-18T20:46:17","date_gmt":"2011-02-18T18:46:17","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=5703"},"modified":"2015-04-15T20:48:07","modified_gmt":"2015-04-15T18:48:07","slug":"une-planete-geante-cachee-dans-notre-systeme-solaire","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/une-planete-geante-cachee-dans-notre-systeme-solaire\/","title":{"rendered":"Une plan\u00e8te g\u00e9ante cach\u00e9e dans notre syst\u00e8me solaire?"},"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 align=\"justify\"><span style=\"font-size: small;\">L\u2019id\u00e9e para\u00eet saugrenue et la question sonne comme un canular. Et pourtant&#8230;<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Cette plan\u00e8te du nom de Tyche serait m\u00eame plus grande que la plus grande des plan\u00e8tes connues de notre syst\u00e8me solaire. Les scientifiques pensent avoir d\u00e9couvert la plus grosse plan\u00e8te du syst\u00e8me solaire. Tyche serait quatre fois plus grosse que Jupiter.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Ce sont deux astrophysiciens, John Matese et Daniel Whitmire de l\u2019universit\u00e9 de Louisiane, qui avancent cette id\u00e9e. Ils se basent sur des donn\u00e9es r\u00e9colt\u00e9es par le t\u00e9l\u00e9scope WISE de la NASA (Wide-field Infrared Survey Explorer) mais qui demandent encore \u00e0 \u00eatre d\u00e9cortiqu\u00e9es.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">A la question de savoir comment une telle plan\u00e8te n\u2019aurait pas encore \u00e9t\u00e9 d\u00e9couverte, ils r\u00e9pondent tout simplement qu\u2019elle se trouve aux confins du syst\u00e8me solaire dans le nuage de Oort. Parmi les plan\u00e8tes de notre syst\u00e8me solaire, Pluton est celle qui est la plus \u00e9loign\u00e9e du soleil. Or Tyche serait 375 fois \u00e9loign\u00e9e du soleil que ne l\u2019est Pluton et 14,700 fois plus \u00e9loign\u00e9e du soleil que la Terre ne l\u2019est. Son orbite serait des centaines de fois plus loin du Soleil que la Terre, ce qui pourrait expliquer qu\u2019elle n\u2019ait pas \u00e9t\u00e9 d\u00e9couverte plus t\u00f4t.<\/span><\/p>\n<p align=\"center\"><span style=\"font-size: small;\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/tyche-orbite.jpg\" alt=\"\" \/><\/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 align=\"justify\"><span style=\"font-size: small;\">Bien entendu, \u00e0 une telle distance du soleil la temp\u00e9rature y serait extr\u00eamement basse. <span style=\"font-size: small;\">Selon le professeur Daniel Whitmire, Tyche serait essentiellement compos\u00e9e d\u2019hydrog\u00e8ne et d\u2019h\u00e9lium avec une atmosph\u00e8re semblable \u00e0 celle de Jupiter. Il esp\u00e8re \u00e9galement que la plan\u00e8te poss\u00e8de des lunes, comme toutes les plan\u00e8tes ext\u00e9rieures. Situ\u00e9e dans le nuage d&rsquo;Oort, ce dernier constitue une sph\u00e8re d\u2019un rayon d\u2019une ann\u00e9e-lumi\u00e8re, indique le Daily Mail.<\/span><\/span><\/p>\n<p align=\"center\"><span style=\"font-size: small;\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/nuage-d-oort.jpg\" alt=\"\" \/><\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Tych\u00e9 (Tyche en Anglais) est la divinit\u00e9 grecque symbolisant fortune et prosp\u00e9rit\u00e9 d\u2019une cit\u00e9.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">Si l\u2019existence de Tyche se voit confirm\u00e9e, il s\u2019agira de la neuvi\u00e8me (et certainement de la plus grande) plan\u00e8te de notre syst\u00e8me. Elle devra encore \u00eatre accept\u00e9e par l\u2019union astronomique internationale et sera susceptible de changer de nom.<\/span><\/p>\n<p align=\"justify\"><span style=\"font-size: small;\">sources : <\/span><a href=\"http:\/\/www.20minutes.fr\/\"><span style=\"font-size: small;\">http:\/\/www.20minutes.fr<\/span><\/a>\u00a0\/ <a href=\"http:\/\/www.maxisciences.com\/\">http:\/\/www.maxisciences.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"5703\">(621)<\/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>L\u2019id\u00e9e para\u00eet saugrenue et la question sonne comme un canular. Et pourtant&#8230; Cette plan\u00e8te du nom de Tyche serait m\u00eame&#8230;<\/p>\n","protected":false},"author":1,"featured_media":5704,"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":"Une plan\u00e8te g\u00e9ante cach\u00e9e dans notre syst\u00e8me solaire?","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":[252,117,2981,4042,2136,420,363,4041],"class_list":["post-5703","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-atmosphere","tag-espace","tag-geante","tag-helium","tag-hydrogene","tag-nouveaute","tag-systeme-solaire","tag-tyche","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/tyche.jpg?fit=200%2C115&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-1tZ","jetpack-related-posts":[{"id":11671,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-systeme-solaire-une-neuvieme-planete\/","url_meta":{"origin":5703,"position":0},"title":"Le syst\u00e8me solaire : Une neuvi\u00e8me plan\u00e8te","author":"Admin","date":"13 avril 2016","format":false,"excerpt":"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. Les plus proches du Soleil sont les quatre plan\u00e8tes rocheuses, relativement petites : Mercure, V\u00e9nus, la Terre\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\/2016\/01\/pluton-ciel-bleu-glace-nasa-1.jpg?fit=648%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"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&resize=350%2C200 1x, 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&resize=525%2C300 1.5x"},"classes":[]},{"id":2899,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-planete-au-dela-du-nuage-de-oort\/","url_meta":{"origin":5703,"position":1},"title":"Une plan\u00e8te au del\u00e0 du nuage de Oort","author":"Admin","date":"9 mai 2005","format":false,"excerpt":"Une Nouvelle plan\u00e8te d\u00e9couverte dans notre syst\u00e8me solaire en 2003. Un astronome BRITANNIQUE a d\u00e9couvert une nouvelle et bizarre plan\u00e8te en orbite autour de notre soleil, elle serait 1.000 fois plus loin que la plan\u00e8te connue la plus \u00e9loign\u00e9e (Pluton). Mais le nouveau corps serait 30.000 fois plus \u00e9loign\u00e9 du\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\/spaw\/images\/457711.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":12873,"url":"https:\/\/www.laterredufutur.com\/accueil\/lunivers-et-ses-mysteres-neptune-uranus-et-pluton\/","url_meta":{"origin":5703,"position":2},"title":"L&rsquo;Univers Et Ses Myst\u00e8res &#8211; Neptune, Uranus Et Pluton","author":"Admin","date":"23 juillet 2016","format":false,"excerpt":"La s\u00e9rie \u00ab L'univers et ses myst\u00e8res \u00bb est une s\u00e9rie documentaire d'une tr\u00e8s grande qualit\u00e9 sur l'univers et l'astronomie. Depuis que l'homme s'est aventur\u00e9 dans l'espace pour la premi\u00e8re fois ,il y a plus de cinquante ans, la d\u00e9couverte spatiale n'a cess\u00e9 de progresser sans arr\u00eat gr\u00e2ce aux prodigieuses\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\/2016\/01\/pluton-ciel-bleu-glace-nasa-3.jpg?fit=1024%2C576&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/pluton-ciel-bleu-glace-nasa-3.jpg?fit=1024%2C576&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/pluton-ciel-bleu-glace-nasa-3.jpg?fit=1024%2C576&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/pluton-ciel-bleu-glace-nasa-3.jpg?fit=1024%2C576&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":21550,"url":"https:\/\/www.laterredufutur.com\/accueil\/nouvelle-preuve-une-autre-planete-du-systeme-solaire-a-ete-expulsee\/","url_meta":{"origin":5703,"position":3},"title":"Nouvelle preuve: une autre plan\u00e8te du syst\u00e8me solaire a \u00e9t\u00e9 expuls\u00e9e","author":"Admin","date":"5 novembre 2020","format":false,"excerpt":"Les chercheurs disent qu'une troisi\u00e8me g\u00e9ante, entre Uranus et Neptune, a \u00e9t\u00e9 expuls\u00e9 de notre syst\u00e8me solaire. Selon l'\u00e9quipe de scientifiques de la Carnegie Institution for Science, une plan\u00e8te suppl\u00e9mentaire situ\u00e9e entre Saturne et Uranus a \u00e9t\u00e9 projet\u00e9e hors du syst\u00e8me solaire alors qu'elle en \u00e9tait encore \u00e0 ses balbutiements.\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-neptune.jpg?fit=1024%2C682&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus-neptune.jpg?fit=1024%2C682&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus-neptune.jpg?fit=1024%2C682&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/11\/uranus-neptune.jpg?fit=1024%2C682&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":17136,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-dune-nouvelle-planete-naine-dans-notre-systeme-solaire\/","url_meta":{"origin":5703,"position":4},"title":"D\u00e9couverte d\u2019une nouvelle plan\u00e8te naine dans notre syst\u00e8me solaire","author":"Admin","date":"9 novembre 2018","format":false,"excerpt":"Des scientifiques ont rep\u00e9r\u00e9, bien au-del\u00e0 de Pluton, une plan\u00e8te naine qu\u2019ils ont baptis\u00e9e \u00ab The goblin \u00bb (le gobelin). Sa d\u00e9couverte relance les th\u00e9ories sur l\u2019existence d\u2019une neuvi\u00e8me plan\u00e8te dans notre syst\u00e8me solaire. Le \u00ab gobelin \u00bb, ou 2015 TG387, est le troisi\u00e8me objet transneptunien extr\u00eame avec Sedna et\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\/2018\/11\/planet-goblin.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/11\/planet-goblin.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/11\/planet-goblin.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/11\/planet-goblin.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/11\/planet-goblin.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":24759,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-planete-geante-semble-se-cacher-quelque-part-dans-notre-systeme-solaire\/","url_meta":{"origin":5703,"position":5},"title":"Une plan\u00e8te g\u00e9ante semble se cacher quelque part dans notre syst\u00e8me solaire","author":"Admin","date":"19 f\u00e9vrier 2023","format":false,"excerpt":"Notre syst\u00e8me solaire est un endroit tr\u00e8s int\u00e9ressant. Des millions d'objets s'y d\u00e9placent, des plan\u00e8tes aux lunes, en passant par les com\u00e8tes et les ast\u00e9ro\u00efdes. Et chaque ann\u00e9e, nous d\u00e9couvrons de plus en plus d'objets (g\u00e9n\u00e9ralement de petits ast\u00e9ro\u00efdes ou des com\u00e8tes rapides) qui ont \u00e9lu domicile dans le syst\u00e8me\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\/2021\/11\/planete-9.jpg?fit=1024%2C683&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/planete-9.jpg?fit=1024%2C683&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/planete-9.jpg?fit=1024%2C683&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/11\/planete-9.jpg?fit=1024%2C683&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/5703","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=5703"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/5703\/revisions"}],"predecessor-version":[{"id":5705,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/5703\/revisions\/5705"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/5704"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=5703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=5703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=5703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}