{"id":3304,"date":"2015-08-13T19:27:40","date_gmt":"2015-08-13T19:27:40","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=3304"},"modified":"2015-08-26T05:04:24","modified_gmt":"2015-08-26T05:04:24","slug":"en-video-linstrument-sphere-traque-les-exoplanetes","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/13\/en-video-linstrument-sphere-traque-les-exoplanetes\/","title":{"rendered":"En vid\u00e9o : l&#8217;instrument SPHERE traque les exoplan\u00e8tes"},"content":{"rendered":"<p><strong>L&#8217;instrument europ\u00e9en SPHERE est op\u00e9rationnel depuis plus d&#8217;un an sur le VLT. Le CNRS nous pr\u00e9sente en vid\u00e9o cet \u00e9tonnant chasseur d&#8217;exoplan\u00e8tes.\u00a0<\/strong><\/p>\n<p>Install\u00e9 depuis mai 2014 sur le <em>Very Large telescope<\/em> de l&#8217;<a href=\"http:\/\/www.eso.org\/public\/\" target=\"_blank\">ESO<\/a>, l&#8217;instrument <a href=\"http:\/\/www.lesia.obspm.fr\/SPHERE-Spectro-Polarimetric-High.html\" target=\"_blank\">SPHERE<\/a> (<em>Spectro Polarimetric High contrast Exoplanet REsearch<\/em>) est con\u00e7u pour fournir directement des images des <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/16\/tom-wagg-decouvreur-dune-exoplanete-a-lage-de-15-ans\/\" target=\"_blank\">plan\u00e8tes extrasolaires<\/a> ainsi que leurs caract\u00e9ristiques spectrales et colorim\u00e9triques.<\/p>\n<p>C&#8217;est sous la responsabilit\u00e9 de l\u2019<a href=\"http:\/\/ipag.osug.fr\/\" target=\"_blank\">Institut de Plan\u00e9tologie et d\u2019Astrophysique de Grenoble<\/a> que cet instrument a \u00e9t\u00e9 con\u00e7u par un consortium d\u2019astronomes et d\u2019ing\u00e9nieurs europ\u00e9ens.<\/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\/x2xe3bh\" 0=\"allowfullscreen\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p>Pour que l&#8217;instrument SPHERE soit capable d&#8217;imager et de caract\u00e9riser des exoplan\u00e8tes en orbite autour d&#8217;\u00e9toiles proches, il est indispensable de remplir deux conditions :<\/p>\n<ul>\n<li>installer SPHERE sur un tr\u00e8s grand <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/\" target=\"_blank\">t\u00e9lescope<\/a>\u00a0(c&#8217;est le cas avec le VLT dont chacun des 4 t\u00e9lescopes dispose d&#8217;un miroir de 8.2 m de diam\u00e8tre)<\/li>\n<li>disposer d&#8217;une optique adaptative particuli\u00e8rement performante, ce que nous expliquent les chercheurs David Mouillet (<a href=\"http:\/\/www-laog.obs.ujf-grenoble.fr\/\" target=\"_blank\">LAOG<\/a>) et Thierry Fusco (<a href=\"http:\/\/www.onera.fr\/\" target=\"_blank\">ONERA<\/a>) dans cette vid\u00e9o<\/li>\n<\/ul>\n<p>Rappelons que nous f\u00eaterons cette ann\u00e9e au mois d&#8217;octobre la d\u00e9couverte de la premi\u00e8re exoplan\u00e8te, <a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/planetes-extrasolaires-premiere-fois-on-repere-lumiere-exoplanete-51-pegasi-b-57991\/\" target=\"_blank\">51 Pegasi b<\/a> ; c&#8217;\u00e9tait en 1995 \u00e0 l&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/05\/07\/telescope-lohp\/\" target=\"_blank\">Observatoire de Haute-Provence<\/a>\u00a0gr\u00e2ce \u00e0 \u00a0Michel Mayor et Didier Queloz. En 20 ans, ce sont pr\u00e8s de 2000 <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/06\/28\/gliese-436b-lexoplanete-qui-traine-une-queue-dhydrogene\/\" target=\"_blank\">exoplan\u00e8tes <\/a>qui ont \u00e9t\u00e9 d\u00e9couvertes. D\u00e9sormais les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/12\/14\/lumiere-rouge-les-astronomes\/\" target=\"_blank\">astronomes <\/a>disposent d&#8217;instruments capables de d\u00e9tecter des exoterres, des plan\u00e8tes qui se situent dans la zone d&#8217;habitabilit\u00e9 d&#8217;\u00e9toiles semblables au <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/07\/11\/le-soleil-est-a-sa-plus-grande-distance-de-la-terre\/\" target=\"_blank\">Soleil<\/a>, \u00e0 l&#8217;image de <a href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/zone-habitabilite-kepler-452b-exoplanete-plus-ressemblante-terre-59111\/\" target=\"_blank\">Kepler 452b<\/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>L&#8217;instrument europ\u00e9en SPHERE est op\u00e9rationnel depuis plus d&#8217;un an sur le VLT. Le CNRS nous pr\u00e9sente en vid\u00e9o cet \u00e9tonnant chasseur d&#8217;exoplan\u00e8tes.\u00a0 Install\u00e9 depuis mai 2014 sur le Very Large telescope de l&#8217;ESO, l&#8217;instrument SPHERE (Spectro Polarimetric High contrast Exoplanet REsearch) est con\u00e7u pour fournir directement des images des plan\u00e8tes extrasolaires ainsi que leurs caract\u00e9ristiques &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/13\/en-video-linstrument-sphere-traque-les-exoplanetes\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">En vid\u00e9o : l&#8217;instrument SPHERE traque les exoplan\u00e8tes<\/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":3305,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[1191,1189,110,1174,1188,1190,637],"class_list":["post-3304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-cnrs","tag-david-mouillet","tag-exoplanete","tag-kepler-452b","tag-sphere","tag-thierry-fusco","tag-vlt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>En vid\u00e9o : l&#039;instrument SPHERE traque les exoplan\u00e8tes<\/title>\n<meta name=\"description\" content=\"L&#039;instrument europ\u00e9en SPHERE est op\u00e9rationnel depuis plus d&#039;un an sur le VLT. 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