{"id":134653,"date":"2023-07-12T16:24:05","date_gmt":"2023-07-12T16:24:05","guid":{"rendered":"https:\/\/sftarticles.wpenginepowered.com\/es\/?p=297748"},"modified":"2025-06-12T11:14:14","modified_gmt":"2025-06-12T10:14:14","slug":"tenir-sur-le-systeme-solaire-pourrait-avoir-une-nouvelle-planete-inconnue-inconnue-jusqua-maintenant","status":"publish","type":"post","link":"https:\/\/cms-articles.softonic.io\/fr\/tenir-sur-le-systeme-solaire-pourrait-avoir-une-nouvelle-planete-inconnue-inconnue-jusqua-maintenant\/","title":{"rendered":"Attendez: le syst\u00e8me solaire pourrait avoir une nouvelle plan\u00e8te inconnue jusqu&#039;\u00e0 pr\u00e9sent"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Le nuage d&#8217;Oort est une structure nuageuse qui, selon les scientifiques, entoure le syst\u00e8me solaire et se comporte comme la limite ext\u00e9rieure de l&#8217;influence gravitationnelle du Soleil sur la Voie lact\u00e9e.<\/p>\n\n\n<div class=\"sc-card-program\">\r\n  <div class=\"sc-card-program__body\">\r\n    <div class=\"sc-card-program__row clearfix\">\r\n      <div class=\"sc-card-program__col-logo\">\r\n        <img decoding=\"async\" class=\"sc-card-program__img\" src=\"https:\/\/images.sftcdn.net\/images\/t_app-icon-s\/p\/2cddcc48-a4d6-11e6-88af-00163ec9f5fa\/3678680588\/nasa-app-logo\" alt=\"Application NASA\" width=\"100px\" height=\"100px\">\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-title\">\r\n        <span class=\"sc-card-program__title\">Application NASA<\/span>\r\n        <a class=\"sc-card-program__button sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\">Tel\u00e8charg\u00e8r<\/a>\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-rating\">\r\n        \r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <span class=\"sc-card-program__description\"><\/span>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <img decoding=\"async\" class=\"sc-card-program__bigpic\" src=\"\">\r\n    <\/div>\r\n    <a class=\"sc-card-program__link track-link sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\"><\/a>\r\n  <\/div>\r\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La structure nuageuse est compos\u00e9e principalement de restes glac\u00e9s qui alimentent le syst\u00e8me solaire avec ses com\u00e8tes \u00e0 longue p\u00e9riode, mais elle pourrait aussi abriter une plan\u00e8te g\u00e9ante encore inconnue.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les sp\u00e9culations sur une neuvi\u00e8me plan\u00e8te hypoth\u00e9tique (d\u00e9sol\u00e9, Pluton) dans le syst\u00e8me solaire se sont longtemps concentr\u00e9es sur la plan\u00e8te X, mais une \u00e9tude r\u00e9cemment publi\u00e9e propose qu&#8217;une grande plan\u00e8te inconnue pourrait se cacher bien au-del\u00e0 des orbites plan\u00e9taires standard.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/articles-img.sftcdn.net\/sft\/articles\/auto-mapping-folder\/sites\/2\/2023\/07\/Planeta-desconocido-del-Sistema-Solar-1024x576.jpg\" alt=\"\" class=\"wp-image-297751\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Une neuvi\u00e8me plan\u00e8te apr\u00e8s le d\u00e9part de Pluton<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cette plan\u00e8te semblable \u00e0 Uranus ou Jupiter serait en orbite autour du syst\u00e8me solaire, et pas seulement du Soleil, \u00e0 l&#8217;int\u00e9rieur du nuage d&#8217;Oort, ce qui signifie qu&#8217;elle habiterait \u00e0 la limite la plus externe de l&#8217;attraction gravitationnelle du Soleil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Selon l&#8217;\u00e9tude, ces plan\u00e8tes th\u00e9oriques du nuage d&#8217;Oort (exo) pourraient \u00eatre une caract\u00e9ristique standard d&#8217;une sur 200\/3.000 \u00e9toiles, ce qui est probablement une surestimation, puisque les chercheurs n&#8217;ont pas pris en compte les instabilit\u00e9s qui se produisent lors de la formation d&#8217;une \u00e9toile et de son disque plan\u00e9taire.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-block-embed-Youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"The Oort Cloud | The Solar System&#039;s Shell\" width=\"840\" height=\"473\" src=\"https:\/\/www.youtube.com\/embed\/q4mc-alL92U?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Des scientifiques du Centre national de la recherche scientifique (CNRS) et d&#8217;autres instituts de recherche ont men\u00e9 des simulations complexes d&#8217;instabilit\u00e9s dynamiques pour \u00e9valuer comment une grande plan\u00e8te pourrait \u00eatre \u00e9ject\u00e9e d&#8217;un syst\u00e8me solaire ou comment un syst\u00e8me plan\u00e9taire d\u00e9j\u00e0 \u00e9tabli pourrait capturer une plan\u00e8te en fuite qui traverse le plan galactique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La fraction estim\u00e9e de plan\u00e8tes \u00e9ject\u00e9es qui sont pi\u00e9g\u00e9es dans les nuages d&#8217;Oort varie de 1 \u00e0 10%, selon l&#8217;\u00e9tude, en fonction de la distribution initiale de la masse plan\u00e9taire lors de la cr\u00e9ation du syst\u00e8me.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"550\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">The Oort Cloud. <a href=\"https:\/\/twitter.com\/hashtag\/space?src=hash&amp;ref_src=twsrc%5Etfw\">#space<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/solarsystem?src=hash&amp;ref_src=twsrc%5Etfw\">#solarsystem<\/a> <a href=\"https:\/\/t.co\/eNdXYjW9e9\">pic.twitter.com\/eNdXYjW9e9<\/a><\/p>&mdash; Cosmoknowledge (@cosmoknowledge) <a href=\"https:\/\/twitter.com\/cosmoknowledge\/status\/1676258204894806016?ref_src=twsrc%5Etfw\">July 4, 2023<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Si l&#8217;instabilit\u00e9 dynamique du syst\u00e8me solaire &#8220;survenu apr\u00e8s la dissolution du groupe de naissance&#8221;, poursuit l&#8217;\u00e9tude, il y a 7% de chance qu&#8217;une g\u00e9ante des glaces soit pi\u00e9g\u00e9e dans le nuage d&#8217;Oort du Soleil.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Par cons\u00e9quent, la plan\u00e8te g\u00e9ante inconnue au bord du syst\u00e8me solaire pourrait probablement \u00eatre une exoplan\u00e8te voyou qui a \u00e9t\u00e9 captur\u00e9e par l&#8217;influence gravitationnelle du Soleil apr\u00e8s la formation du syst\u00e8me solaire.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le nuage d&#8217;Oort entoure le Soleil \u00e0 des distances allant de 2.000 et 200.000 UA, c&#8217;est-\u00e0-dire entre 0,03 et 3,2 ann\u00e9es-lumi\u00e8re, ce qui signifie que l&#8217;attraction gravitationnelle susmentionn\u00e9e est assez faible par rapport \u00e0 celle qui maintient en place les huit plan\u00e8tes (confirm\u00e9es) du syst\u00e8me solaire.<\/p>\n\n\n<div class=\"sc-card-program\">\r\n  <div class=\"sc-card-program__body\">\r\n    <div class=\"sc-card-program__row clearfix\">\r\n      <div class=\"sc-card-program__col-logo\">\r\n        <img decoding=\"async\" class=\"sc-card-program__img\" src=\"https:\/\/images.sftcdn.net\/images\/t_app-icon-s\/p\/2cddcc48-a4d6-11e6-88af-00163ec9f5fa\/3678680588\/nasa-app-logo\" alt=\"Application NASA\" width=\"100px\" height=\"100px\">\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-title\">\r\n        <span class=\"sc-card-program__title\">Application NASA<\/span>\r\n        <a class=\"sc-card-program__button sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\">Tel\u00e8charg\u00e8r<\/a>\r\n      <\/div>\r\n      <div class=\"sc-card-program__col-rating\">\r\n        \r\n      <\/div>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <span class=\"sc-card-program__description\"><\/span>\r\n    <\/div>\r\n    <div class=\"sc-card-program__row\">\r\n      <img decoding=\"async\" class=\"sc-card-program__bigpic\" src=\"\">\r\n    <\/div>\r\n    <a class=\"sc-card-program__link track-link sc-card-program-internal\" href=\"https:\/\/nasa-app.fr.softonic.com\/android\" target=\"_self\" rel=\"noopener noreferrer\"><\/a>\r\n  <\/div>\r\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Certains des liens ajout\u00e9s dans l&#8217;article font partie de campagnes d&#8217;affiliation et peuvent repr\u00e9senter des avantages pour Softonic.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans le syst\u00e8me solaire, ils se sont longtemps concentr\u00e9s sur la plan\u00e8te X, mais une \u00e9tude r\u00e9cemment publi\u00e9e propose que&#8230;<\/p>\n","protected":false},"author":9265,"featured_media":134654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","wpcf-pageviews":0},"categories":[16761],"tags":[17024],"usertag":[],"vertical":[],"content-category":[],"class_list":["post-134653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-app-subdomain-redirectionnasa-app"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134653","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/users\/9265"}],"replies":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/comments?post=134653"}],"version-history":[{"count":1,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134653\/revisions"}],"predecessor-version":[{"id":162003,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/posts\/134653\/revisions\/162003"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/media\/134654"}],"wp:attachment":[{"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/media?parent=134653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/categories?post=134653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/tags?post=134653"},{"taxonomy":"usertag","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/usertag?post=134653"},{"taxonomy":"vertical","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/vertical?post=134653"},{"taxonomy":"content-category","embeddable":true,"href":"https:\/\/cms-articles.softonic.io\/fr\/wp-json\/wp\/v2\/content-category?post=134653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}