{"id":21186,"date":"2025-05-07T16:56:48","date_gmt":"2025-05-07T16:56:48","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=21186"},"modified":"2025-05-21T13:57:40","modified_gmt":"2025-05-21T13:57:40","slug":"admirez-ar-4079-une-impressionnante-tache-solaire","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/05\/07\/admirez-ar-4079-une-impressionnante-tache-solaire\/","title":{"rendered":"Admirez AR 4079, une impressionnante tache solaire"},"content":{"rendered":"<p><strong>S\u2019\u00e9tirant actuellement sur pr\u00e8s de 140.000 kilom\u00e8tres, la tache g\u00e9ante AR 4079 est suivie avec int\u00e9r\u00eat par tous les observateurs du Soleil.\u00a0<\/strong><\/p>\n<h5>Soleil encore actif :<\/h5>\n<p>La tr\u00e8s belle tache AR 4079 nous apporte la preuve que le cycle solaire en cours n&#8217;a pas dit son dernier mot. Rappelons que ce cycle, le vingt-cinqui\u00e8me, a d\u00e9but\u00e9 fin 2019, lorsque l&#8217;on a not\u00e9 un changement de polarit\u00e9 du <a href=\"https:\/\/www.futura-sciences.com\/sciences\/breves\/soleil-explosions-magnetiques-inconnues-surface-soleil-1700\/\" target=\"_blank\" rel=\"noopener noreferrer\">magn\u00e9tisme du Soleil<\/a>. Chaque cycle ayant une dur\u00e9e moyenne de onze ans, les astronomes estiment que le maximum du cycle actuel s&#8217;est produit fin 2024 :<\/p>\n<figure id=\"attachment_20812\" aria-describedby=\"caption-attachment-20812\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil.jpg\" rel=\"lightbox[21186]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-20812 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-20812\" class=\"wp-caption-text\"><a href=\"https:\/\/ecp.earthsky.org\/community-photos\/entry\/72902\/?\" target=\"_blank\" rel=\"noopener\">Patricio Leon<\/a> a superpos\u00e9 les 259 images solaires qu\u2019il a prises en 2024. Voil\u00e0 de quoi r\u00e9v\u00e9ler de fa\u00e7on spectaculaire l\u2019intensit\u00e9 de l\u2019activit\u00e9 de notre \u00e9toile durant l\u2019ann\u00e9e \u00e9coul\u00e9e.<\/figcaption><\/figure>\n<p>Logiquement, l&#8217;activit\u00e9 solaire est donc en train de d\u00e9cro\u00eetre. Cela signifie que les taches,\u00a0 ces zones sombres moins chaudes qui trahissent une intense activit\u00e9 magn\u00e9tique, vont \u00eatre moins nombreuses. Avec sans doute quelques belles surprises, comme actuellement :<\/p>\n<figure id=\"attachment_21187\" aria-describedby=\"caption-attachment-21187\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2.jpg\" rel=\"lightbox[21186]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-21187\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-21187\" class=\"wp-caption-text\">La tache solaire AR 4079 photographi\u00e9e le 7 mai 2025. \u00a9 <a href=\"https:\/\/spaceweathergallery2.com\/indiv_upload.php?upload_id=222614\" target=\"_blank\" rel=\"noopener\">Maximilian-Vlad Teodorescu<\/a><\/figcaption><\/figure>\n<p>Pour m\u00e9moire, les taches sont num\u00e9rot\u00e9es dans l\u2019ordre d\u2019apparition, le num\u00e9ro \u00e9tant pr\u00e9c\u00e9d\u00e9 par les lettres AR qui signifient <em>Active Region<\/em>.<\/p>\n<h5>\u00c0 savoir :<\/h5>\n<ul>\n<li>L\u2019observation du Soleil n\u00e9cessite imp\u00e9rativement l\u2019adjonction d\u2019un filtre. La soci\u00e9t\u00e9 Stelvision vous propose par exemple deux mod\u00e8les (<a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/filtre-solaire-astf80-pour-lunette-astronomique-stelescope-70-ou-equivalent\/\" target=\"_blank\" rel=\"noopener\">ASTF 80<\/a>\u00a0ou\u00a0<a href=\"https:\/\/www.stelvision.com\/astro\/boutique\/filtre-solaire-astf140-pour-telescope-stelescope-130-ou-equivalent\/\" target=\"_blank\" rel=\"noopener\">ASTF 140<\/a>) adaptables sur un\u00a0<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>, qui ne laissent passer que 1\/100.000e du rayonnement solaire.<\/li>\n<li>En l\u2019absence de filtre, il est quand m\u00eame possible de suivre sans danger l\u2019activit\u00e9 de notre \u00e9toile. Pour cela, il suffit de se rendre sur la page du satellite solaire <a href=\"http:\/\/sohowww.nascom.nasa.gov\/sunspots\/\" target=\"_blank\" rel=\"noopener noreferrer\">SOHO<\/a>\u00a0(<em>SOlar and Heliospheric Observatory<\/em>).<\/li>\n<li>C\u2019est\u00a0<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>\u00a0qui le premier observa des taches solaires avec une\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/05\/bien-choisir-sa-premiere-lunette-astronomique\/\" target=\"_blank\" rel=\"noopener\">lunette astronomique<\/a>\u00a0en 1612. Heinrich Schwabe remarqua la p\u00e9riodicit\u00e9 de ces taches en 1848. Puis l\u2019astronome Rudolph Wolf d\u00e9termina la dur\u00e9e moyenne d\u2019un cycle solaire : environ 11 ans.<\/li>\n<\/ul>\n<figure id=\"attachment_21189\" aria-describedby=\"caption-attachment-21189\" style=\"width: 338px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil.jpg\" rel=\"lightbox[21186]\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-21189 size-medium\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil-338x450.jpg\" alt=\"\" width=\"338\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil-338x450.jpg 338w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil-768x1024.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/05\/soleil.jpg 900w\" sizes=\"auto, (max-width: 338px) 100vw, 338px\" \/><\/a><figcaption id=\"caption-attachment-21189\" class=\"wp-caption-text\">Dessin de la tache solaire AR 4079 r\u00e9alis\u00e9 avec un t\u00e9lescope le 30 avril 2025. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/09\/26\/uy-scuti-la-supergeante-1-700-fois-plus-grande-que-le-soleil\/\" target=\"_blank\" rel=\"noopener\">UY Scuti, la superg\u00e9ante 1.700 fois plus grande que le Soleil<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/08\/23\/video-famille-francaise-soleil-noir\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : une famille fran\u00e7aise sous le Soleil noir<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/25\/une-eclipse-solaire-vue-de-lespace\/\" target=\"_blank\" rel=\"noopener\">Une \u00e9clipse solaire vue de l\u2019espace<\/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> \u00a0et 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>S\u2019\u00e9tirant actuellement sur pr\u00e8s de 140.000 kilom\u00e8tres, la tache g\u00e9ante AR 4079 est suivie avec int\u00e9r\u00eat par tous les observateurs du Soleil.\u00a0 Soleil encore actif : La tr\u00e8s belle tache AR 4079 nous apporte la preuve que le cycle solaire en cours n&#8217;a pas dit son dernier mot. Rappelons que ce cycle, le vingt-cinqui\u00e8me, a &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/05\/07\/admirez-ar-4079-une-impressionnante-tache-solaire\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Admirez AR 4079, une impressionnante tache solaire<\/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":21187,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[3770,97,261],"class_list":["post-21186","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-ar-4079","tag-soleil","tag-tache-solaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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