{"id":8379,"date":"2024-08-26T11:01:20","date_gmt":"2024-08-26T09:01:20","guid":{"rendered":"https:\/\/starbottle.space\/?p=8379"},"modified":"2024-08-26T11:01:23","modified_gmt":"2024-08-26T09:01:23","slug":"epsilon-indi-ab-il-gigante-freddo-immaginato-da-star-trek","status":"publish","type":"post","link":"https:\/\/starbottle.space\/fr\/epsilon-indi-ab-le-geant-froid-imagine-par-star-trek\/","title":{"rendered":"Epsilon Indi AB, le g\u00e9ant froid imagin\u00e9 par Star Trek"},"content":{"rendered":"<p>Parmi les nombreux modes d'observation pr\u00e9vus par le t\u00e9lescope spatial James Webb, celui appel\u00e9 \u201c MIRI avec chronographe \u201d permet de d\u00e9tecter dans l'infrarouge moyen des plan\u00e8tes qui seraient autrement obscurcies par la lumi\u00e8re de leur propre \u00e9toile.<br>C'est le cas d'Epsilon Indi AB, une g\u00e9ante gazeuse six fois plus grande que Jupiter, avec une temp\u00e9rature moyenne l\u00e9g\u00e8rement sup\u00e9rieure \u00e0 z\u00e9ro degr\u00e9 Celsius, ce qui en fait la plan\u00e8te la plus froide jamais observ\u00e9e en dehors du syst\u00e8me solaire.<br>Le <a href=\"https:\/\/www.nature.com\/articles\/s41586-024-07837-8\" target=\"_blank\" rel=\"noreferrer noopener\">\u00e9tude<\/a>, men\u00e9e par Elisabeth Matthews de l'Institut Max Planck d'astronomie \u00e0 Heidelberg (Allemagne) et publi\u00e9e dans Nature, a r\u00e9ussi \u00e0 prendre une image d'Epsilon Indi AB au cours de son impressionnante orbite de deux cents ans autour de son \u00e9toile de r\u00e9f\u00e9rence.<br>Depuis des d\u00e9cennies, les astronomes imaginent des plan\u00e8tes dans ce syst\u00e8me, froides mais tout de m\u00eame plus de cent degr\u00e9s plus chaudes que Jupiter et Saturne, donc tr\u00e8s utiles pour des \u00e9tudes comparatives. Mais les amateurs de science-fiction s'int\u00e9ressent \u00e9galement \u00e0 cette d\u00e9couverte : les plan\u00e8tes imaginaires qui orbitent autour d'Epsilon Indi ont fait l'objet d'\u00e9pisodes de Star Trek, de romans et de jeux vid\u00e9o tels que Halo.<\/p>","protected":false},"excerpt":{"rendered":"<p>Tra le tante modalit\u00e0 di osservazione previste dal telescopio spaziale James Webb, quella chiamata \u201cMIRI con cronografo\u201d permette di individuare nel medio infrarosso pianeti che altrimenti sarebbero oscurati dalla luce della propria stella.\u00c8 il caso di Epsilon Indi AB, un gigante gassoso grande sei volte Giove, con una temperatura media di poco pi\u00f9 di zero [&hellip;]<\/p>\n","protected":false},"author":55,"featured_media":8382,"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-8379","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\/8379","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=8379"}],"version-history":[{"count":1,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts\/8379\/revisions"}],"predecessor-version":[{"id":8383,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/posts\/8379\/revisions\/8383"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/media\/8382"}],"wp:attachment":[{"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/media?parent=8379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/categories?post=8379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starbottle.space\/fr\/wp-json\/wp\/v2\/tags?post=8379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}