{"id":5151,"date":"2016-02-29T14:27:08","date_gmt":"2016-02-29T14:27:08","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=5151"},"modified":"2016-03-08T14:15:38","modified_gmt":"2016-03-08T14:15:38","slug":"ar-2506-un-petit-groupe-de-taches-solaires","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/29\/ar-2506-un-petit-groupe-de-taches-solaires\/","title":{"rendered":"AR 2506, un petit groupe de taches solaires"},"content":{"rendered":"<p><strong>M\u00eame si le Soleil est actuellement assez calme, on peut y voir quelques taches comme le groupe AR 2506 photographi\u00e9 le 28 f\u00e9vrier.<\/strong><\/p>\n<p>Depuis 2013, date du dernier pic d\u2019activit\u00e9 solaire (pic consid\u00e9r\u00e9 par les scientifiques comme le plus faible depuis un si\u00e8cle), les taches sur le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/14\/un-filament-circulaire-geant-sest-forme-sur-le-soleil\/\" target=\"_blank\">Soleil <\/a>se font de plus en plus discr\u00e8tes. On peut suivre actuellement un petit groupe nomm\u00e9 AR 2506 (AR signifie <em>Active Region<\/em>, les num\u00e9ros \u00e9tant attribu\u00e9s par ordre d\u2019apparition des taches par la <a href=\"http:\/\/www.noaa.gov\/\" target=\"_blank\">NOAA<\/a>, <em>National Oceanic and Atmospheric Administration<\/em>).<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x2hb4go\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : de superbes images du Soleil pour f\u00eater les 5 ans du satellite SDO<\/strong><\/p>\n<p style=\"text-align: left\">Les taches sur le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/15\/dans-la-mer-le-soleil-est-encore-plus-beau\/\" target=\"_blank\">Soleil <\/a>sont des r\u00e9gions d\u2019intense activit\u00e9 magn\u00e9tique pouvant g\u00e9n\u00e9rer des \u00e9ruptions solaires avec \u00e9jection de masse coronale qui s\u2019ach\u00e8vent en beaut\u00e9 sur Terre par des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/17\/en-video-un-parapentiste-danse-avec-les-aurores-boreales\/\" target=\"_blank\">aurores bor\u00e9ales<\/a>.<\/p>\n<p style=\"text-align: left\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3.jpg\"  rel=\"lightbox[5151] attachment wp-att-5152\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5152\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3-450x311.jpg\" alt=\"soleil3\" width=\"450\" height=\"311\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3-450x311.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3-768x531.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3-1024x709.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil3.jpg 1571w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Si vous ne disposez pas d&#8217;un instrument astronomique prot\u00e9g\u00e9 par un filtre (n&#8217;observez JAMAIS le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/11\/un-avion-de-ligne-passe-devant-le-soleil-tache\/\" target=\"_blank\">Soleil <\/a>sans un filtre protecteur), il vous est possible de suivre l\u2019\u00e9volution de cette tache solaire sur la page des satellites solaires <a href=\"http:\/\/sohowww.nascom.nasa.gov\/sunspots\/\" target=\"_blank\">SOHO<\/a> (<em>SOlar and Heliospheric Observatory<\/em>) ou <a href=\"http:\/\/sdo.gsfc.nasa.gov\/\" target=\"_blank\">SDO<\/a> (<em>Solar Dynamics Observatory<\/em>).<!--more--><\/p>\n<p>L&#8217;image ci-dessus a \u00e9t\u00e9 r\u00e9alis\u00e9e en fin d&#8217;apr\u00e8s-midi le 28 f\u00e9vrier avec un bo\u00eetier Finepix HS20 et un zoom de 720 mm de focale prot\u00e9g\u00e9 par un filtre ND (<em>Neutral Density<\/em>). L&#8217;image ci-dessous montre avec une meilleure qualit\u00e9 le groupe de taches AR 2506 photographi\u00e9e \u00e0 la m\u00eame date par le satellite solaire SDO.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil4.jpg\"  rel=\"lightbox[5151] attachment wp-att-5153\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-5153\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil4-450x272.jpg\" alt=\"soleil4\" width=\"450\" height=\"272\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil4-450x272.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/soleil4.jpg 674w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/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>M\u00eame si le Soleil est actuellement assez calme, on peut y voir quelques taches comme le groupe AR 2506 photographi\u00e9 le 28 f\u00e9vrier. Depuis 2013, date du dernier pic d\u2019activit\u00e9 solaire (pic consid\u00e9r\u00e9 par les scientifiques comme le plus faible depuis un si\u00e8cle), les taches sur le Soleil se font de plus en plus discr\u00e8tes. &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/29\/ar-2506-un-petit-groupe-de-taches-solaires\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">AR 2506, un petit groupe de taches solaires<\/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":5152,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1528,257,577,760,97,261],"class_list":["post-5151","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-ar-2506","tag-noaa","tag-sdo","tag-soho","tag-soleil","tag-tache-solaire"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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