{"id":22059,"date":"2025-11-30T13:18:31","date_gmt":"2025-11-30T13:18:31","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=22059"},"modified":"2026-01-01T18:10:30","modified_gmt":"2026-01-01T18:10:30","slug":"ephemerides-le-ciel-du-mois-de-decembre-2025","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/11\/30\/ephemerides-le-ciel-du-mois-de-decembre-2025\/","title":{"rendered":"\u00c9ph\u00e9m\u00e9rides : le ciel du mois de d\u00e9cembre 2025"},"content":{"rendered":"<p><strong>Le maximum d&#8217;activit\u00e9 de l&#8217;essaim d&#8217;\u00e9toiles filantes des G\u00e9minides sera le principal \u00e9v\u00e9nement astronomique de ce mois de d\u00e9cembre 2025.\u00a0<\/strong><\/p>\n<h5>Un jeune essaim m\u00e9t\u00e9oritique :<\/h5>\n<p>C&#8217;est le 14 d\u00e9cembre 2025 qu&#8217;aura lieu le traditionnel pic d\u2019activit\u00e9 des G\u00e9minides. Bien qu&#8217;\u00e9tant l&#8217;un des essaims d&#8217;<a href=\"https:\/\/fr.wikipedia.org\/wiki\/%C3%89toile_filante\" target=\"_blank\" rel=\"noopener\">\u00e9toiles filantes<\/a> les plus actifs, il n\u2019est mentionn\u00e9 que depuis 150 ans. Au moment du maximum, le taux horaire atteint 75 <a href=\"https:\/\/fr.wikipedia.org\/wiki\/M%C3%A9t%C3%A9ore\" target=\"_blank\" rel=\"noopener\">m\u00e9t\u00e9ores<\/a>. Curieusement, cet essaim n\u2019est pas associ\u00e9 \u00e0 une <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Com%C3%A8te\" target=\"_blank\" rel=\"noopener\">com\u00e8te<\/a> mais \u00e0 un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Ast%C3%A9ro%C3%AFde\" target=\"_blank\" rel=\"noopener\">ast\u00e9ro\u00efde<\/a>. Il s\u2019agit de <a href=\"http:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-asteroide-phaeton-associe-geminides-va-froler-terre-43443\/\" target=\"_blank\" rel=\"noopener\">(3200) Pha\u00e9ton<\/a>, d\u00e9couvert le 11 octobre 1983 par le t\u00e9lescope spatial infrarouge <a href=\"http:\/\/irsa.ipac.caltech.edu\/IRASdocs\/iras.html\" target=\"_blank\" rel=\"noopener\">IRAS<\/a>. Comme les m\u00e9t\u00e9ores semblent jaillir de la<a href=\"https:\/\/fr.wikipedia.org\/wiki\/G%C3%A9meaux\" target=\"_blank\" rel=\"noopener\"> constellation des G\u00e9meaux<\/a>, non loin des \u00e9toiles Castor et Pollux, on leur a donn\u00e9 le nom de G\u00e9minides :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-18819\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2-450x338.jpg\" alt=\"\" width=\"450\" height=\"338\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2-768x576.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/12\/geminid2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Admirez cette image, r\u00e9alis\u00e9e en d\u00e9cembre 2023 par <a href=\"https:\/\/noirlab.edu\/public\/images\/iotw2352a\/\" target=\"_blank\" rel=\"noopener\">Rob Sparks<\/a> depuis l\u2019Observatoire de Kitt Peak. \u00a0En d\u00e9cembre 2025, le pic d&#8217;activit\u00e9 de l&#8217;essaim se produira apr\u00e8s le Dernier quartier de Lune, donc dans d&#8217;excellentes conditions. Je vous propose maintenant de d\u00e9couvrir les autres observations possibles.<!--more--><\/p>\n<h5>Ph\u00e9nom\u00e8nes astronomiques du mois :<\/h5>\n<ul>\n<li>\u00a0 La nuit du 3 au 4, veille de la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pleine_lune\" target=\"_blank\" rel=\"noopener\">Pleine Lune<\/a>, notre satellite naturel s&#8217;approche de l&#8217;<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Pl%C3%A9iades_(astronomie)\" target=\"_blank\" rel=\"noopener\">amas des Pl\u00e9iades<\/a> pour en occulter les \u00e9toiles en fin de nuit. Il s&#8217;agit d&#8217;une observation d\u00e9licate (\u00e0 faire aux jumelles) en raison de l&#8217;\u00e9clat lunaire. Notez \u00e9galement la pr\u00e9sence d&#8217;<a href=\"https:\/\/cnes.fr\/dossiers\/planete-uranus\" target=\"_blank\" rel=\"noopener\">Uranus<\/a> \u00e0 proximit\u00e9.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22061\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1-450x233.jpg\" alt=\"\" width=\"450\" height=\"233\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1-450x233.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1-1024x530.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1-768x397.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph1.jpg 1365w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Dans la soir\u00e9e du 6, dirigez un petit <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope<\/a> en direction de <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Jupiter_(plan%C3%A8te)\" target=\"_blank\" rel=\"noopener\">Jupiter<\/a>. Les quatre lunes d\u00e9couvertes par <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/06\/galilee-le-savant-qui-a-ouvert-nos-yeux-sur-lunivers\/\" target=\"_blank\" rel=\"noopener\">Galil\u00e9e<\/a> sont align\u00e9es \u00e0 l&#8217;Est de la plan\u00e8te.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22062\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2-450x235.jpg\" alt=\"\" width=\"450\" height=\"235\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2-450x235.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2-1024x535.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2-768x401.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph2.jpg 1362w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>\u00c0 l&#8217;aube du 10 d\u00e9cembre, l&#8217;\u00e9toile <a href=\"https:\/\/fr.wikipedia.org\/wiki\/R%C3%A9gulus_(%C3%A9toile)\" target=\"_blank\" rel=\"noopener\">R\u00e9gulus<\/a> du Lion brille juste \u00e0 c\u00f4t\u00e9 de la Lune gibbeuse d\u00e9croissante. L&#8217;occultation de l&#8217;\u00e9toile (\u00e0 suivre dans une paire de jumelles) a lieu apr\u00e8s le lever du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22063\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3-450x235.jpg\" alt=\"\" width=\"450\" height=\"235\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3-450x235.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3-1024x534.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3-768x401.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph3.jpg 1366w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 11, c&#8217;est le Dernier quartier de Lune.<\/li>\n<li>Le 14, maximum de l&#8217;essaim des G\u00e9minides (voir plus haut).<\/li>\n<li>Le 20, c&#8217;est la Nouvelle Lune. Profitez des nuits sans Lune pour admirer la majestueuse <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/15\/vision-insolite-de-la-constellation-dorion\/\" target=\"_blank\" rel=\"noopener\">constellation d&#8217;Orion<\/a> en d\u00e9but de nuit.<\/li>\n<\/ul>\n<figure id=\"attachment_15355\" aria-describedby=\"caption-attachment-15355\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15355\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/01\/orion.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15355\" class=\"wp-caption-text\">La constellation d&#8217;Orion est la plus belle du ciel d&#8217;hiver. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<ul>\n<li>Le 21 marque le d\u00e9but de l&#8217;hiver dans l&#8217;h\u00e9misph\u00e8re Nord, c&#8217;est le <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Solstice_de_d%C3%A9cembre\" target=\"_blank\" rel=\"noopener\">solstice de d\u00e9cembre<\/a>.<\/li>\n<li>Les 26 et 27 d\u00e9cembre, admirez enfin le gros croissant de Lune qui accompagne <a href=\"https:\/\/cnes.fr\/dossiers\/planete-saturne\" target=\"_blank\" rel=\"noopener\">Saturne<\/a>. La plan\u00e8te <a href=\"https:\/\/cnes.fr\/dossiers\/planete-neptune\" target=\"_blank\" rel=\"noopener\">Neptune<\/a> n&#8217;est pas loin.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4.jpg\" rel=\"lightbox[22059]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22064\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4-450x236.jpg\" alt=\"\" width=\"450\" height=\"236\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4-450x236.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4-1024x537.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4-768x403.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/11\/eph4.jpg 1365w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p><em>Les captures d\u2019\u00e9cran qui illustrent ces \u00e9ph\u00e9m\u00e9rides ont \u00e9t\u00e9 r\u00e9alis\u00e9es \u00e0 l\u2019aide du logiciel\u00a0<a href=\"https:\/\/stellarium.org\/fr\/\" target=\"_blank\" rel=\"noopener\">Stellarium<\/a>, indispensable pour vos soir\u00e9es d\u2019astronomie.<\/em><\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/10\/30\/ciel-aux-jumelles-guide-decouvrir-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">Le Ciel aux jumelles, un guide pour d\u00e9couvrir le ciel nocturne<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/06\/12\/j-30-la-lune-dans-une-paire-de-jumelles-mode-demploi\/\" target=\"_blank\" rel=\"noopener\">La Lune dans une paire de jumelles, mode d\u2019emploi<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/11\/13\/les-yeux-de-hibou-detonnantes-jumelles\/\" target=\"_blank\" rel=\"noopener\">Les \u201cYeux de hibou\u201d, d\u2019\u00e9tonnantes jumelles<\/a><\/li>\n<\/ul>\n<p>Je vous invite \u00e0 suivre l\u2019actualit\u00e9 astronomique et d\u00e9couvrir mes images du ciel en vous abonnant \u00e0 Cielmania sur <a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/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 maximum d&#8217;activit\u00e9 de l&#8217;essaim d&#8217;\u00e9toiles filantes des G\u00e9minides sera le principal \u00e9v\u00e9nement astronomique de ce mois de d\u00e9cembre 2025.\u00a0 Un jeune essaim m\u00e9t\u00e9oritique : C&#8217;est le 14 d\u00e9cembre 2025 qu&#8217;aura lieu le traditionnel pic d\u2019activit\u00e9 des G\u00e9minides. Bien qu&#8217;\u00e9tant l&#8217;un des essaims d&#8217;\u00e9toiles filantes les plus actifs, il n\u2019est mentionn\u00e9 que depuis 150 ans. &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/11\/30\/ephemerides-le-ciel-du-mois-de-decembre-2025\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c9ph\u00e9m\u00e9rides : le ciel du mois de d\u00e9cembre 2025<\/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":22060,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3877,149,725],"class_list":["post-22059","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-decembre-2025","tag-ephemerides","tag-geminides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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