{"id":6313,"date":"2016-09-11T11:30:30","date_gmt":"2016-09-11T11:30:30","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6313"},"modified":"2016-09-21T15:49:27","modified_gmt":"2016-09-21T15:49:27","slug":"suivez-mercure-champ-coronographe-de-soho","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/09\/11\/suivez-mercure-champ-coronographe-de-soho\/","title":{"rendered":"Suivez Mercure dans le champ du coronographe de SOHO"},"content":{"rendered":"<p><strong>Mercure, la premi\u00e8re plan\u00e8te du Syst\u00e8me solaire, \u00a0est visible dans le champ du coronographe LASCO C3 de l\u2019observatoire solaire SOHO.<\/strong><\/p>\n<p>SOHO (<em><a href=\"http:\/\/sohowww.nascom.nasa.gov\/\" target=\"_blank\">Solar and Heliospheric Observatory<\/a><\/em>) est un satellite d\u2019une masse de 1,8 tonne qui a \u00e9t\u00e9 plac\u00e9 au point de Lagrange L1 \u00e0 environ 1,5 million de km de notre plan\u00e8te, l\u00e0 ou l\u2019attraction de la Terre et celle du <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 en \u00e9quilibre. Ses observations solaires viennent compl\u00e9ter celles de SDO, <em><a href=\"http:\/\/sdo.gsfc.nasa.gov\/\" target=\"_blank\">Solar Dynamics Observatory<\/a><\/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\/x2hwwty\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : une gracieuse \u00e9ruption solaire film\u00e9e par SDO<\/strong><\/p>\n<p style=\"text-align: left\">Lanc\u00e9 il y a plus de 20 ans, le 2 d\u00e9cembre 1995 exactement, SOHO fournit quotidiennement un bulletin de sant\u00e9 de notre \u00e9toile dans diff\u00e9rentes longueurs d\u2019onde \u00e0 l\u2019aide de ses 12 instruments scientifiques : analyseurs de particules, t\u00e9lescopes, coronographes, spectrographe et imageurs.<\/p>\n<p style=\"text-align: left\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/09\/soho1.jpg\" rel=\"lightbox[6313]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6336\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/09\/soho1-450x450.jpg\" alt=\"soho1\" width=\"450\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/09\/soho1-450x450.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/09\/soho1-150x150.jpg 150w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/09\/soho1.jpg 512w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les coronographes LASCO C2 (champ \u00e9troit) et C3 (grand champ) sont destin\u00e9s \u00e0 \u00e9tudier la couronne solaire (LASCO signifie <em>Large Angle and Spectrometric Coronagraph<\/em>). Un cache central leur permet de masquer le Soleil, trop lumineux, pour voir ce qui se passe autour : des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/09\/11\/eruption-solaire-du-10-septembre\/\" target=\"_blank\">\u00e9ruptions solaires<\/a> bien s\u00fbr, mais \u00e9galement des \u00e9toiles, des<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/02\/c2015-d1-la-comete-qui-defie-le-soleil-et-les-astronomes\/\" target=\"_blank\">com\u00e8tes kamikazes<\/a> et parfois des plan\u00e8tes.<!--more--><span id=\"more-5768\"><\/span><\/p>\n<p>C\u2019est dans le champ de <a href=\"http:\/\/sohowww.nascom.nasa.gov\/data\/realtime\/c3\/512\/\" target=\"_blank\">LASCO C3<\/a> que l&#8217;on peut suivre le passage de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/05\/12\/video-decouvrez-reliefs-de-planete-mercure\/\" target=\"_blank\">Mercure<\/a>\u00a0pendant quelques jours (du 09 au 17 septembre), la premi\u00e8re plan\u00e8te du Syst\u00e8me solaire \u00e9tant en conjonction inf\u00e9rieure le 12. Dans le coronographe de SOHO Mercure est un astre de magnitude 4 que l&#8217;on peut rep\u00e9rer en raison de son d\u00e9placement par rapport au fond de ciel \u00e9toil\u00e9.<\/p>\n<p>Apr\u00e8s ce passage dans l&#8217;axe du Soleil, la plan\u00e8te Mercure va rapidement s&#8217;en \u00e9loigner pour faire une belle apparition \u00e0 l&#8217;aube, sa magnitude augmentant rapidement. Le 29 septembre Mercure (magnitude 0) se situera juste \u00e0 c\u00f4t\u00e9 d&#8217;un croissant de vieille Lune en fin de nuit.<\/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>Mercure, la premi\u00e8re plan\u00e8te du Syst\u00e8me solaire, \u00a0est visible dans le champ du coronographe LASCO C3 de l\u2019observatoire solaire SOHO. SOHO (Solar and Heliospheric Observatory) est un satellite d\u2019une masse de 1,8 tonne qui a \u00e9t\u00e9 plac\u00e9 au point de Lagrange L1 \u00e0 environ 1,5 million de km de notre plan\u00e8te, l\u00e0 ou l\u2019attraction de &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/09\/11\/suivez-mercure-champ-coronographe-de-soho\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Suivez Mercure dans le champ du coronographe de SOHO<\/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":6336,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1155,868,945,140,577,760,1032],"class_list":["post-6313","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-conjonction-inferieure","tag-coronographe","tag-lasco-c3","tag-mercure","tag-sdo","tag-soho","tag-vieille-lune"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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