{"id":21515,"date":"2025-08-20T09:19:18","date_gmt":"2025-08-20T09:19:18","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=21515"},"modified":"2025-09-06T12:03:21","modified_gmt":"2025-09-06T12:03:21","slug":"une-nouvelle-lune-decouverte-autour-de-la-lointaine-uranus","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/08\/20\/une-nouvelle-lune-decouverte-autour-de-la-lointaine-uranus\/","title":{"rendered":"Une nouvelle lune d\u00e9couverte autour de la lointaine Uranus"},"content":{"rendered":"<p><strong>Le t\u00e9lescope spatial James Webb a d\u00e9couvert une vingt-neuvi\u00e8me lune autour d&#8217;Uranus, la septi\u00e8me plan\u00e8te du Syst\u00e8me solaire.<\/strong><\/p>\n<h5>La plan\u00e8te d\u2019Herschel :<\/h5>\n<p>Uranus a \u00e9t\u00e9 d\u00e9couverte le 13 mars 1781 par\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/personnalites\/astronomie-william-herschel-521\/\" target=\"_blank\" rel=\"noopener\">William Herschel<\/a>, lui assurant une immense c\u00e9l\u00e9brit\u00e9. L\u2019astronome-musicien utilisait alors un t\u00e9lescope de 160 millim\u00e8tres de diam\u00e8tre. Avec un rayon d\u2019un peu plus de 25.000 kilom\u00e8tres, cette plan\u00e8te gazeuse g\u00e9ante arrive en troisi\u00e8me position apr\u00e8s <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/06\/19\/jupiter-lage-de-la-grande-tache-rouge-remis-en-cause\/\" target=\"_blank\" rel=\"noopener\">Jupiter<\/a>\u00a0et\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/07\/spectacle-saturne-au-plus-pres-de-la-terre\/\" target=\"_blank\" rel=\"noopener\">Saturne<\/a>\u00a0:<\/p>\n<figure id=\"attachment_20399\" aria-describedby=\"caption-attachment-20399\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2.jpg\" rel=\"lightbox[21515]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-20399\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2-450x316.jpg\" alt=\"\" width=\"450\" height=\"316\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2-450x316.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2-1024x719.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2-768x540.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/11\/uranus2.jpg 1200w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-20399\" class=\"wp-caption-text\">Uranus et quelques-uns de ses satellites. \u00a9 <a href=\"https:\/\/app.astrobin.com\/search?p=eJy7Ob0ktaLEVtXcSdXIqCwxpzQVSKsaO4JIEHIGkrmJJckZIZUFCClHHx%2B4bH5eTmVwamJRcoZnXkhmSU5qsWNeiktqcXJRZkFJZn5eMURXWmJOcaqquYtacWlSVmpySXwJ0EDb0CBHv9BgtYLE9FRbQzAVnFkFZBoYAAA48jC3&amp;i=4e11vi\" target=\"_blank\" rel=\"noopener\">Georges Astrophotography<\/a><\/figcaption><\/figure>\n<p>Uranus met un peu plus de 84 ans pour effectuer une r\u00e9volution autour du\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/univers-soleil-3727\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>. Depuis quelques ann\u00e9es, les instruments de plus en plus performants ont permis d\u2019observer des modifications de la m\u00e9t\u00e9o sur Uranus :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/uranus.jpg\" rel=\"lightbox[21515]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1200 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/uranus-450x338.jpg\" alt=\"\" width=\"450\" height=\"338\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/uranus-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/uranus-1024x769.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2014\/11\/uranus.jpg 1198w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>On a photographi\u00e9 d\u2019\u00e9normes temp\u00eates (image ci-dessus) sous forme de nuages clairs. Une couleur qui s\u2019explique probablement par la remont\u00e9e de glace de m\u00e9thane. Par ailleurs, ces temp\u00eates sont pouss\u00e9es par des vents pouvant atteindre 900 km\/h. On a \u00e9galement d\u00e9couvert (en 1977) <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-telescope-james-webb-revele-toute-beaute-uranus-anneaux-104591\/\" target=\"_blank\" rel=\"noopener\">un syst\u00e8me d\u2019anneaux<\/a> autour de la plan\u00e8te.<!--more--><\/p>\n<h5>Nouvelle lune :<\/h5>\n<p>Jusqu&#8217;\u00e0 pr\u00e9sent, on connaissait 28 lunes autour de la plan\u00e8te. Sachez que cinq d&#8217;entre elles sont qualifi\u00e9es de majeures : il s&#8217;agit de Titania, Ob\u00e9ron, Miranda, Ariel et Umbriel. Les deux premi\u00e8res ont d&#8217;abord \u00e9t\u00e9 d\u00e9couvertes en 1787 par William Herschel, puis Ariel et Umbriel par <a href=\"https:\/\/fr.wikipedia.org\/wiki\/William_Lassell\" target=\"_blank\" rel=\"noopener\">William Lassell<\/a> en 1851 et Miranda par <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/12\/23\/gerard-kuiper-une-passion-pour-le-systeme-solaire\/\" target=\"_blank\" rel=\"noopener\">Gerard Kuiper<\/a> en 1948. Les autres, beaucoup plus petites, sont rep\u00e9r\u00e9es depuis une quarantaine d&#8217;ann\u00e9es par les sondes plan\u00e9taires et les t\u00e9lescopes au sol. S\/2025 U1 a \u00e9t\u00e9 identifi\u00e9e par l&#8217;\u00e9quipe de <a href=\"https:\/\/science.nasa.gov\/blogs\/webb\/2025\/08\/19\/new-moon-discovered-orbiting-uranus-using-nasas-webb-telescope\/\" target=\"_blank\" rel=\"noopener\">Maryame El Moutamid<\/a>, astrophysicienne marocaine, qui utilisait le <a href=\"https:\/\/esawebb.org\/images\/uranus-moon-S2025U1\/\" target=\"_blank\" rel=\"noopener\">JWST<\/a>. Reste \u00e0 trouver un nom \u00e0 cette petite lune, probablement en piochant dans les \u0153uvres de <a href=\"https:\/\/fr.wikipedia.org\/wiki\/William_Shakespeare\" target=\"_blank\" rel=\"noopener\">Shakespeare<\/a>, comme c&#8217;est d\u00e9sormais la tradition pour ces astres.<\/p>\n<figure id=\"attachment_21516\" aria-describedby=\"caption-attachment-21516\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2.jpg\" rel=\"lightbox[21515]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21516\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2-450x338.jpg\" alt=\"\" width=\"450\" height=\"338\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2-768x576.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/08\/uranus2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21516\" class=\"wp-caption-text\">S\/2025 U1 est la derni\u00e8re d\u00e9couverte du JWST. \u00a9 NASA\/ESA<\/figcaption><\/figure>\n<p>Enfin, si vous avez envie de rep\u00e9rer Uranus, c&#8217;est possible avant l&#8217;aube. Une paire de jumelles vous montrera le petit point bleu verd\u00e2tre de cette plan\u00e8te non loin de l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/03\/31\/lamas-detoiles-des-pleiades-dans-la-poussiere\/\" target=\"_blank\" rel=\"noopener\">amas d&#8217;\u00e9toiles des Pl\u00e9iades<\/a> (utilisez une application comme <a href=\"https:\/\/stellarium-web.org\/\" target=\"_blank\" rel=\"noopener\">Stellarium<\/a>). Malgr\u00e9 tout, n&#8217;esp\u00e9rez pas voir les satellites, beaucoup trop peu lumineux :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7.jpg\" rel=\"lightbox[21515]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-21405\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7-450x248.jpg\" alt=\"\" width=\"450\" height=\"248\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7-450x248.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7-1024x565.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7-768x424.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7-672x372.jpg 672w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/07\/stell7.jpg 1059w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/11\/08\/08-novembre-en-asie-on-a-admire-une-eclipse-de-lune-et-duranus\/\" target=\"_blank\" rel=\"noopener\">En Asie, on a admir\u00e9 une \u00e9clipse de Lune et d\u2019Uranus<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/28\/feerie-celeste-au-dessus-du-wiyn-telescope\/\" target=\"_blank\" rel=\"noopener\">F\u00e9\u00e9rie c\u00e9leste au-dessus du WIYN Telescope<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/20\/comment-reperer-neptune-au-plus-pres-de-la-terre\/\" target=\"_blank\" rel=\"noopener\">Comment rep\u00e9rer Neptune au plus pr\u00e8s de la Terre<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a> et sur\u00a0<a href=\"https:\/\/bsky.app\/profile\/cielmania.bsky.social\" target=\"_blank\" rel=\"noopener\">Bluesky<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Le t\u00e9lescope spatial James Webb a d\u00e9couvert une vingt-neuvi\u00e8me lune autour d&#8217;Uranus, la septi\u00e8me plan\u00e8te du Syst\u00e8me solaire. La plan\u00e8te d\u2019Herschel : Uranus a \u00e9t\u00e9 d\u00e9couverte le 13 mars 1781 par\u00a0William Herschel, lui assurant une immense c\u00e9l\u00e9brit\u00e9. L\u2019astronome-musicien utilisait alors un t\u00e9lescope de 160 millim\u00e8tres de diam\u00e8tre. Avec un rayon d\u2019un peu plus de 25.000 &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/08\/20\/une-nouvelle-lune-decouverte-autour-de-la-lointaine-uranus\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Une nouvelle lune d\u00e9couverte autour de la lointaine Uranus<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":21516,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[2608,3251,3812,3810,128,129,3811],"class_list":["post-21515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-gerard-kuiper","tag-james-webb-space-telescope","tag-maryame-el-moutamid","tag-s-2025-u1","tag-uranus","tag-william-herschel","tag-william-lassell"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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