{"id":6072,"date":"2016-07-19T05:05:08","date_gmt":"2016-07-19T05:05:08","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6072"},"modified":"2016-07-27T07:24:28","modified_gmt":"2016-07-27T07:24:28","slug":"deux-grosses-taches-solaires-face-a-terre","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/07\/19\/deux-grosses-taches-solaires-face-a-terre\/","title":{"rendered":"Deux grosses taches solaires font face \u00e0 la Terre"},"content":{"rendered":"

Apparues depuis quelques jours, deux imposantes taches solaires viennent nous rappeler que notre \u00e9toile n’est jamais calme bien longtemps.<\/strong><\/p>\n

L’ activit\u00e9 solaire a \u00e9t\u00e9 faible ces derniers mois mais les choses pourraient bient\u00f4t changer. Apr\u00e8s AR 2529, la belle tache solaire en forme de c\u0153ur<\/a> que je vous invitais \u00e0 suivre au mois d’avril, voici deux grands groupes de taches qui sont actuellement bien visibles au milieu du disque solaire, comme le montrent les images r\u00e9alis\u00e9es par l’astronome amateur Alain Brodin<\/a> le 17 juillet \u00e0 l’aide d’un t\u00e9lescope de 150 millim\u00e8tres de diam\u00e8tre : il s’agit de AR 2565 \u00e0 droite et AR 2567 dont une partie s’est s\u00e9par\u00e9e.<\/p>\n

\"soleil4\"<\/a><\/p>\n

Rappelons que les taches solaires (num\u00e9rot\u00e9es dans l\u2019ordre d\u2019apparition par laNOAA<\/a>, National Oceanic and Atmospheric Administration<\/em>, AR signifiant Active Region<\/em>)\u00a0sont des anomalies magn\u00e9tiques moins chaudes que le reste de la surface du Soleil<\/a>, ce qui les rend plus sombres.\u00a0Ces taches sont \u00e0 l\u2019origine d\u2019\u00e9jection de mati\u00e8re solaire dans l\u2019espace qui se traduit sur Terre par de tr\u00e8s belles aurores bor\u00e9ales<\/a>.<\/p>\n

\"soleil3\"<\/a><\/p>\n

N’oubliez pas que comme \u00e0 l’occasion d’une \u00e9clipse de Soleil<\/a>, l’observation des taches n\u00e9cessite une filtration particuli\u00e8rement efficace pour ne pas subir de graves l\u00e9sions oculaires. On trouve des filtres solaires \u00e0 installer \u00e0 l’avant d’une lunette astronomique<\/a>, d’un t\u00e9lescope <\/a>ou d’un appareil photo dans tous les magasins de mat\u00e9riel astronomique.<\/p>\n

\"astrosolar\"<\/a><\/p>\n

\"astrosolar2\"<\/a><\/p>\n

Vous pouvez \u00e9galement suivre l’\u00e9volution de ce groupe de taches sur\u00a0la page des satellites solaires SOHO <\/a>(SOlar and Heliospheric Observatory<\/em>) ou SDO <\/a>(Solar Dynamics Observatory<\/em>).<\/p>\n","protected":false},"excerpt":{"rendered":"

Apparues depuis quelques jours, deux imposantes taches solaires viennent nous rappeler que notre \u00e9toile n’est jamais calme bien longtemps. L’ activit\u00e9 solaire a \u00e9t\u00e9 faible ces derniers mois mais les choses pourraient bient\u00f4t changer. Apr\u00e8s AR 2529, la belle tache solaire en forme de c\u0153ur que je vous invitais \u00e0 suivre au mois d’avril, voici … Continuer la lecture de Deux grosses taches solaires font face \u00e0 la Terre<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":6076,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1757,1598,257,577,760,97,261],"class_list":["post-6072","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-alain-brodin","tag-filtre-solaire","tag-noaa","tag-sdo","tag-soho","tag-soleil","tag-tache-solaire"],"yoast_head":"\nDeux grosses taches solaires font face \u00e0 la Terre<\/title>\n<meta name=\"description\" content=\"Apparues depuis quelques jours, deux imposantes taches solaires viennent nous rappeler que notre \u00e9toile n'est jamais calme bien 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