{"id":8377,"date":"2024-08-26T10:58:13","date_gmt":"2024-08-26T08:58:13","guid":{"rendered":"https:\/\/starbottle.space\/?p=8377"},"modified":"2024-08-26T10:58:15","modified_gmt":"2024-08-26T08:58:15","slug":"un-esopianeta-palla-di-neve-con-un-oceano-di-acqua-liquida","status":"publish","type":"post","link":"https:\/\/starbottle.space\/fr\/une-exoplanete-boule-de-neige-avec-un-ocean-deau-liquide\/","title":{"rendered":"Une exoplan\u00e8te \u201cboule de neige\u201d avec un oc\u00e9an d'eau liquide ?"},"content":{"rendered":"<p>Les derni\u00e8res observations du t\u00e9lescope James Webb ont ouvert un nouveau sc\u00e9nario pour l'exoplan\u00e8te d\u00e9j\u00e0 connue Lhs 1140 b, l'une des plus prometteuses dans la zone habitable de son \u00e9toile, une naine rouge de faible masse, environ cinq fois plus petite que le Soleil, potentiellement capable d'abriter une atmosph\u00e8re et m\u00eame un oc\u00e9an d'eau liquide. Le <a href=\"https:\/\/arxiv.org\/abs\/2406.15136\" data-type=\"link\" data-id=\"https:\/\/arxiv.org\/abs\/2406.15136\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e9sultats<\/a> Les r\u00e9sultats de cette d\u00e9couverte seront bient\u00f4t publi\u00e9s dans The Astrophysical Journal Letters par des chercheurs de l'Universit\u00e9 de Montr\u00e9al, au Canada.<br>Les \u00e9tudes indiquent que s'il avait une atmosph\u00e8re similaire \u00e0 celle de la Terre, Lhs 1140 b pourrait \u00eatre une plan\u00e8te \u201c boule de neige \u201d avec un oc\u00e9an \u201c en forme d'\u0153il de b\u0153uf \u201d d'environ 4 000 kilom\u00e8tres de diam\u00e8tre, soit l'\u00e9quivalent de la moiti\u00e9 de la superficie de l'oc\u00e9an Atlantique. La temp\u00e9rature \u00e0 la surface au centre de cet oc\u00e9an extraterrestre pourrait m\u00eame atteindre 20 degr\u00e9s Celsius.<br>La plan\u00e8te est rarement observable (environ huit fois par an), ce qui rend les \u00e9tudes approfondies complexes, mais si l'intuition des chercheurs canadiens s'av\u00e8re correcte, soyez assur\u00e9s que nous entendrons encore parler de Lhs 1140 b !<\/p>","protected":false},"excerpt":{"rendered":"<p>Le ultime osservazioni del telescopio James Webb hanno aperto un nuovo scenario per il gi\u00e0 noto esopianeta Lhs 1140 b, tra i pi\u00f9 promettenti nella zona abitabile della sua stella, una nana rossa di bassa massa, grande circa un quinto del Sole, potenzialmente in grado di ospitare un\u2019atmosfera e persino un oceano di acqua liquida. [&hellip;]<\/p>\n","protected":false},"author":55,"featured_media":8380,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wds_primary_category":44,"footnotes":""},"categories":[44],"tags":[],"class_list":["post-8377","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vita-nello-spazio"],"acf":[],"_links":{"self":[{"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts\/8377","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/users\/55"}],"replies":[{"embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/comments?post=8377"}],"version-history":[{"count":1,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts\/8377\/revisions"}],"predecessor-version":[{"id":8381,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts\/8377\/revisions\/8381"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/media\/8380"}],"wp:attachment":[{"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/media?parent=8377"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/categories?post=8377"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/tags?post=8377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}