{"id":1857,"date":"2015-02-11T06:18:15","date_gmt":"2015-02-11T06:18:15","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=1857"},"modified":"2015-02-17T06:03:59","modified_gmt":"2015-02-17T06:03:59","slug":"un-filament-geant-sest-forme-sur-le-soleil","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/","title":{"rendered":"Un filament g\u00e9ant s’est form\u00e9 sur le Soleil"},"content":{"rendered":"

Les astronomes <\/a>amateurs et les observatoires professionnels suivent depuis quelques jours le d\u00e9veloppement d’un tr\u00e8s grand filament solaire dont la longueur est estim\u00e9e actuellement \u00e0 1 million de \u00a0kilom\u00e8tres.<\/p>\n

\"SDO2\"<\/a><\/p>\n

Ce filament, compos\u00e9 de mati\u00e8re solaire (hydrog\u00e8ne, calcium et quelques m\u00e9taux sous forme gazeuse), est environ 100 fois plus froid et plus dense que le reste de la couronne solaire, cette derni\u00e8re n’\u00e9tant visible qu’au moment d’une \u00e9clipse totale<\/a>.<\/p>\n

Ce filament est maintenu en suspension par de puissants champs magn\u00e9tiques, de telle sorte qu’un hypoth\u00e9tique observateur plac\u00e9 \u00e0 la surface du Soleil <\/a>verrait ce filament comme un mur.<\/p>\n

On ne peut observer les filaments solaires que dans certaines longueurs d’onde, comme la c\u00e9l\u00e8bre raie H alpha (centr\u00e9e sur 656,3 nanom\u00e8tres), caract\u00e9ristique de l’hydrog\u00e8ne ionis\u00e9. C’est ce que fait en continu l’observatoire spatial SDO <\/a>(Solar Dynamics Observatory<\/em>) qui photographie notre \u00e9toile dans diff\u00e9rentes longueurs d’onde depuis qu’il a \u00e9t\u00e9 plac\u00e9 en f\u00e9vrier 2010 sur une orbite g\u00e9osynchrone (36 000 km au-dessus de la Terre).<\/p>\n

M\u00eame s’il est imposant, ce filament est encore loin d’\u00e9galer la taille de celui qui est apparu au d\u00e9but du mois d’octobre 2014 (sa longueur avait \u00e9t\u00e9 estim\u00e9e \u00e0 1,6 million de kilom\u00e8tres).<\/p>\n","protected":false},"excerpt":{"rendered":"

Les astronomes amateurs et les observatoires professionnels suivent depuis quelques jours le d\u00e9veloppement d’un tr\u00e8s grand filament solaire dont la longueur est estim\u00e9e actuellement \u00e0 1 million de \u00a0kilom\u00e8tres. Ce filament, compos\u00e9 de mati\u00e8re solaire (hydrog\u00e8ne, calcium et quelques m\u00e9taux sous forme gazeuse), est environ 100 fois plus froid et plus dense que le reste … Continuer la lecture de Un filament g\u00e9ant s’est form\u00e9 sur le Soleil<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":1859,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[94,787,320,316,832,104,577,97],"class_list":["post-1857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-astronome","tag-champ-magnetique","tag-couronne-solaire","tag-eclipse","tag-filament-solaire","tag-observatoire","tag-sdo","tag-soleil"],"yoast_head":"\nUn filament g\u00e9ant s'est form\u00e9 sur le Soleil<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Un filament g\u00e9ant s'est form\u00e9 sur le Soleil\" \/>\n<meta property=\"og:description\" content=\"Les astronomes amateurs et les observatoires professionnels suivent depuis quelques jours le d\u00e9veloppement d’un tr\u00e8s grand filament solaire dont la longueur est estim\u00e9e actuellement \u00e0 1 million de \u00a0kilom\u00e8tres. Ce filament, compos\u00e9 de mati\u00e8re solaire (hydrog\u00e8ne, calcium et quelques m\u00e9taux sous forme gazeuse), est environ 100 fois plus froid et plus dense que le reste … Continuer la lecture de Un filament g\u00e9ant s’est form\u00e9 sur le Soleil →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2015-02-11T06:18:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-02-17T06:03:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/SDO1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jean-Baptiste FELDMANN\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jean-Baptiste FELDMANN\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/\",\"name\":\"Un filament g\u00e9ant s'est form\u00e9 sur le Soleil\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/SDO1.jpg\",\"datePublished\":\"2015-02-11T06:18:15+00:00\",\"dateModified\":\"2015-02-17T06:03:59+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#\/schema\/person\/62b391b709c307783237b759b62731ea\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/02\/11\/un-filament-geant-sest-forme-sur-le-soleil\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/SDO1.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/02\/SDO1.jpg\",\"width\":1200,\"height\":900},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/\",\"name\":\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\",\"description\":\""J'ai en moi un besoin terrible. 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