{"id":20811,"date":"2025-03-06T13:07:02","date_gmt":"2025-03-06T13:07:02","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=20811"},"modified":"2025-04-02T15:44:47","modified_gmt":"2025-04-02T15:44:47","slug":"visualisez-lintense-activite-solaire-de-lannee-2024","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/03\/06\/visualisez-lintense-activite-solaire-de-lannee-2024\/","title":{"rendered":"Visualisez l&#8217;intense activit\u00e9 solaire de l&#8217;ann\u00e9e 2024"},"content":{"rendered":"<p><strong>Il est encore trop t\u00f4t pour en \u00eatre certain, mais 2024 aura peut-\u00eatre \u00e9t\u00e9 l&#8217;ann\u00e9e du maximum d&#8217;activit\u00e9 solaire de ce 25e cycle.<\/strong><\/p>\n<h5>Un nouveau cycle riche en taches :<\/h5>\n<p>L&#8217;activit\u00e9 solaire n&#8217;a cess\u00e9 de s&#8217;intensifier depuis 2019. Cette ann\u00e9e-l\u00e0, les scientifiques ont assist\u00e9 au 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>. C&#8217;\u00e9tait le signal de d\u00e9part d&#8217;un nouveau cycle solaire, le vingt-cinqui\u00e8me. Ces cycles, d&#8217;une dur\u00e9e moyenne de onze ans, ont \u00e9t\u00e9 d\u00e9couverts au XIXe si\u00e8cle par <a href=\"https:\/\/www.astro.umontreal.ca\/~paulchar\/grps\/histoire\/newsite\/bio\/schwabe_f.html\" target=\"_blank\" rel=\"noopener\">Heinrich Schwabe<\/a>. L&#8217;astronome allemand avait remarqu\u00e9 la p\u00e9riodicit\u00e9 de l&#8217;apparition des taches solaires :<\/p>\n<figure id=\"attachment_18048\" aria-describedby=\"caption-attachment-18048\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol.jpg\" rel=\"lightbox[20811]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18048\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2023\/06\/tachesol.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18048\" class=\"wp-caption-text\">La tache AR 3354 photographi\u00e9e le 28 juin 2023 au coucher du Soleil. Bo\u00eetier Panasonic FZ82, focale de 1200 mm, 100 iso, pose 1\/800e de seconde. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Ces derni\u00e8res sont des zones sombres moins chaudes qui trahissent une intense activit\u00e9 magn\u00e9tique \u00e0 la surface de notre \u00e9toile. Elles 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>.<!--more--><\/p>\n<h5>Le maximum est-il pass\u00e9 ?<\/h5>\n<p>L\u2019activit\u00e9 de ce nouveau cycle a \u00e9t\u00e9 beaucoup plus \u00e9lev\u00e9e que ce que les simulations pr\u00e9voyaient. Au point qu&#8217;en 2023, les scientifiques ont corrig\u00e9 leurs pr\u00e9visions. Ils ont estim\u00e9 que le maximum de l\u2019activit\u00e9 solaire pourrait intervenir un peu plus t\u00f4t que pr\u00e9vu, fin 2024. Mais pour en \u00eatre certain, il faudra encore attendre quelques mois. Le temps de constater une diminution r\u00e9guli\u00e8re et irr\u00e9versible du nombre de taches :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2025\/02\/soleil.jpg\" rel=\"lightbox[20811]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20812\" 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><\/p>\n<p>En attendant, <a href=\"https:\/\/ecp.earthsky.org\/community-photos\/entry\/72902\/?\" target=\"_blank\" rel=\"noopener\">Patricio Leon<\/a> a eu la bonne id\u00e9e de superposer les 259 images solaires qu&#8217;il a prises en 2024. Voil\u00e0 de quoi r\u00e9v\u00e9ler de fa\u00e7on spectaculaire l&#8217;intensit\u00e9 de l&#8217;activit\u00e9 de notre \u00e9toile durant l&#8217;ann\u00e9e \u00e9coul\u00e9e.<\/p>\n<p><strong>Attention<\/strong> : l\u2019observation du Soleil n\u00e9cessite imp\u00e9rativement l\u2019adjonction d\u2019un filtre. Vous pouvez par exemple utiliser les 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> qui ne laissent passer que 1\/100.000e du rayonnement solaire. Une protection indispensable sur un <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>, pour admirer notre \u00e9toile en toute s\u00e9curit\u00e9 :<\/p>\n<figure id=\"attachment_16699\" aria-describedby=\"caption-attachment-16699\" style=\"width: 431px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/filtre_soleil.jpg\" rel=\"lightbox[20811]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-16699\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/filtre_soleil-431x450.jpg\" alt=\"\" width=\"431\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/filtre_soleil-431x450.jpg 431w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/filtre_soleil-768x803.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/10\/filtre_soleil.jpg 861w\" sizes=\"auto, (max-width: 431px) 100vw, 431px\" \/><\/a><figcaption id=\"caption-attachment-16699\" class=\"wp-caption-text\">Un t\u00e9lescope solaire \u00e9quip\u00e9 d&#8217;un filtre de protection. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/01\/27\/les-stupefiantes-images-solaires-du-telescope-inouye\/\" target=\"_blank\" rel=\"noopener\">Les stup\u00e9fiantes images solaires du t\u00e9lescope Inouye<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/06\/30\/30-juin-1973-soleil-noir-a-bord-du-concorde\/\" target=\"_blank\" rel=\"noopener\">30 juin 1973 : Soleil noir \u00e0 bord du Concorde<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/25\/leclipse-deinstein-fete-ses-100-ans\/\" target=\"_blank\" rel=\"noopener\">L\u2019\u00e9clipse d\u2019Einstein f\u00eate ses 100 ans<\/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>Il est encore trop t\u00f4t pour en \u00eatre certain, mais 2024 aura peut-\u00eatre \u00e9t\u00e9 l&#8217;ann\u00e9e du maximum d&#8217;activit\u00e9 solaire de ce 25e cycle. Un nouveau cycle riche en taches : L&#8217;activit\u00e9 solaire n&#8217;a cess\u00e9 de s&#8217;intensifier depuis 2019. Cette ann\u00e9e-l\u00e0, les scientifiques ont assist\u00e9 au changement de polarit\u00e9 du magn\u00e9tisme du Soleil. C&#8217;\u00e9tait le signal &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/03\/06\/visualisez-lintense-activite-solaire-de-lannee-2024\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Visualisez l&#8217;intense activit\u00e9 solaire de l&#8217;ann\u00e9e 2024<\/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":20812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[465,3718,3719,97,261],"class_list":["post-20811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-cycle-solaire","tag-heinrich-schwabe","tag-patricio-leon","tag-soleil","tag-tache-solaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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