{"id":23184,"date":"2026-08-29T14:49:23","date_gmt":"2026-08-29T14:49:23","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=23184"},"modified":"2026-08-29T14:49:23","modified_gmt":"2026-08-29T14:49:23","slug":"ephemerides-le-ciel-du-mois-de-septembre-2026","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/08\/29\/ephemerides-le-ciel-du-mois-de-septembre-2026\/","title":{"rendered":"\u00c9ph\u00e9m\u00e9rides : le ciel du mois de septembre 2026"},"content":{"rendered":"<p><strong>Apr\u00e8s un mois d&#8217;ao\u00fbt astronomique exceptionnel, septembre 2026 s&#8217;annonce plus calme. L&#8217;occasion de jeter un dernier regard au ciel d&#8217;\u00e9t\u00e9.<\/strong><\/p>\n<h5>Triangle d&#8217;\u00e9t\u00e9 :<\/h5>\n<p>En ce mois de septembre 2026, l\u2019\u00e9t\u00e9 touche doucement \u00e0 sa fin. Pourtant, les nuits sont encore cl\u00e9mentes, et vous avez envie de veiller sous les \u00e9toiles. Choisissez donc une soir\u00e9e sans <a href=\"https:\/\/cnes.fr\/dossiers\/lune\" target=\"_blank\" rel=\"noopener\">Lune<\/a> et rendez-vous dans un endroit loin de la <a href=\"https:\/\/avex-asso.org\/dossiers\/pl\/europe-2016\/\" target=\"_blank\" rel=\"noopener\">pollution lumineuse<\/a>. Puis levez les yeux : vous remarquerez sans peine au-dessus de votre t\u00eate la\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/08\/19\/bivouac-voie-lactee-pied-de-leverest\/\" target=\"_blank\" rel=\"noopener noreferrer\">Voie lact\u00e9e<\/a>. Imm\u00e9diatement, votre regard est attir\u00e9 par trois \u00e9toiles brillantes :<\/p>\n<figure id=\"attachment_14057\" aria-describedby=\"caption-attachment-14057\" style=\"width: 327px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/04\/fleche.jpg\" rel=\"lightbox[23184]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14057\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/04\/fleche-327x450.jpg\" alt=\"\" width=\"327\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/04\/fleche-327x450.jpg 327w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/04\/fleche-743x1024.jpg 743w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2021\/04\/fleche.jpg 768w\" sizes=\"auto, (max-width: 327px) 100vw, 327px\" \/><\/a><figcaption id=\"caption-attachment-14057\" class=\"wp-caption-text\">Randonn\u00e9e c\u00e9leste dans le Triangle d&#8217;\u00e9t\u00e9. \u00a9 <a href=\"https:\/\/www.stelvision.com\/astro\/randonnee-celeste-dans-le-triangle-ete\/\" target=\"_blank\" rel=\"noopener\">Stelvision<\/a><\/figcaption><\/figure>\n<p>Il s&#8217;agit de Deneb, V\u00e9ga et Alta\u00efr, qui forment ce qu&#8217;on appelle le Triangle d&#8217;\u00e9t\u00e9. Ne manquez pas de faire cette jolie <a href=\"https:\/\/www.stelvision.com\/astro\/randonnee-celeste-dans-le-triangle-ete\/\" target=\"_blank\" rel=\"noopener\">randonn\u00e9e c\u00e9leste propos\u00e9e par Stelvision<\/a>, avant de d\u00e9couvrir le ciel du mois.<\/p>\n<h5>Le ciel en septembre 2026 :<\/h5>\n<ul>\n<li>Le 1er au cr\u00e9puscule, cherchez sur l&#8217;horizon Ouest l&#8217;\u00e9toile <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Alpha_Virginis\" target=\"_blank\" rel=\"noopener\">Spica<\/a> juste au-dessus de <a href=\"https:\/\/cnes.fr\/dossiers\/planete-venus\" target=\"_blank\" rel=\"noopener\">V\u00e9nus<\/a>.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st1.jpg\" rel=\"lightbox[23184]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23186\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st1-450x283.jpg\" alt=\"\" width=\"450\" height=\"283\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st1-450x283.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st1-768x483.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st1.jpg 923w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 4, c&#8217;est le Dernier quartier de Lune dans le <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Taureau_(constellation)\" target=\"_blank\" rel=\"noopener\">Taureau<\/a>.<\/li>\n<li>Le 7 \u00e0 l&#8217;aube, rep\u00e9rez \u00e0 l&#8217;Est le point orang\u00e9 de la plan\u00e8te <a href=\"https:\/\/cnes.fr\/dossiers\/planete-mars\" target=\"_blank\" rel=\"noopener\">Mars<\/a> \u00e0 c\u00f4t\u00e9 du dernier croissant de Lune. <a href=\"https:\/\/cnes.fr\/dossiers\/planete-jupiter\" target=\"_blank\" rel=\"noopener\">Jupiter<\/a> pointe son nez \u00e0 l&#8217;horizon.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st2.jpg\" rel=\"lightbox[23184]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23187\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st2-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st2-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st2-768x478.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st2.jpg 933w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 11, c&#8217;est la Nouvelle Lune. Profitez-en pour effectuer la randonn\u00e9e c\u00e9leste dans le Triangle d&#8217;\u00e9t\u00e9.<\/li>\n<li>Le 14 au cr\u00e9puscule, Le jeune croissant de Lune rejoint V\u00e9nus. Cette derni\u00e8re va continuer sa descente en direction du <a href=\"https:\/\/cnes.fr\/dossiers\/soleil\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>, puis nous la retrouverons \u00e0 l&#8217;aube sur l&#8217;horizon Est d\u00e9but novembre.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st3.jpg\" rel=\"lightbox[23184]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23188\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st3-450x279.jpg\" alt=\"\" width=\"450\" height=\"279\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st3-450x279.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st3-768x477.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st3.jpg 929w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<ul>\n<li>Le 18, c&#8217;est le Premier quartier de Lune dans <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Ophiuchus\" target=\"_blank\" rel=\"noopener\">Ophiuchus<\/a>.<\/li>\n<li>Le 23, c&#8217;est l&#8217;<a href=\"https:\/\/fr.wikipedia.org\/wiki\/%C3%89quinoxe_de_septembre\" target=\"_blank\" rel=\"noopener\">\u00e9quinoxe d&#8217;automne<\/a>.<\/li>\n<li>Le 26, c&#8217;est la Pleine Lune dans les <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Poissons_(constellation)\" target=\"_blank\" rel=\"noopener\">Poissons<\/a>. Elle est accompagn\u00e9e toute la nuit par <a href=\"https:\/\/cnes.fr\/dossiers\/planete-saturne\" target=\"_blank\" rel=\"noopener\">Saturne<\/a>, qui ne cesse de se rapprocher de nous avant son opposition le 4 octobre.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st4.jpg\" rel=\"lightbox[23184]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23189\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st4-450x281.jpg\" alt=\"\" width=\"450\" height=\"281\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st4-450x281.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st4-768x480.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/08\/st4.jpg 928w\" 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\/2026\/08\/21\/acuter-elite-phoenix-une-etonnante-lunette-solaire\/\" target=\"_blank\" rel=\"noopener\">Acuter Elite Phoenix, une \u00e9tonnante lunette solaire<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/12\/28\/2025-une-annee-riche-en-astrodessins\/\" target=\"_blank\" rel=\"noopener\">2025, une ann\u00e9e riche en astrodessins<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/06\/29\/premieres-images-de-louverture-des-anneaux-de-saturne\/\" target=\"_blank\" rel=\"noopener\">Premi\u00e8res images de l\u2019ouverture des anneaux de Saturne<\/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>.<\/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>Apr\u00e8s un mois d&#8217;ao\u00fbt astronomique exceptionnel, septembre 2026 s&#8217;annonce plus calme. L&#8217;occasion de jeter un dernier regard au ciel d&#8217;\u00e9t\u00e9. Triangle d&#8217;\u00e9t\u00e9 : En ce mois de septembre 2026, l\u2019\u00e9t\u00e9 touche doucement \u00e0 sa fin. Pourtant, les nuits sont encore cl\u00e9mentes, et vous avez envie de veiller sous les \u00e9toiles. Choisissez donc une soir\u00e9e sans &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/08\/29\/ephemerides-le-ciel-du-mois-de-septembre-2026\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c9ph\u00e9m\u00e9rides : le ciel du mois de septembre 2026<\/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":23202,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[149,4013],"class_list":["post-23184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-ephemerides","tag-septembre-2026"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00c9ph\u00e9m\u00e9rides : le ciel du mois de septembre 2026<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s un mois d&#039;ao\u00fbt astronomique exceptionnel, septembre 2026 s&#039;annonce plus calme. 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