{"id":2713,"date":"2015-05-13T05:49:06","date_gmt":"2015-05-13T05:49:06","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2713"},"modified":"2015-12-15T14:16:21","modified_gmt":"2015-12-15T14:16:21","slug":"resolution-record-pour-une-observation-visuelle","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/","title":{"rendered":"R\u00e9solution record pour une observation visuelle"},"content":{"rendered":"

Pour la premi\u00e8re fois, des astronomes professionnels ont mis leur\u00a0\u0153il \u00e0 l’oculaire d’un t\u00e9lescope g\u00e9ant de 6,5 m\u00e8tres de diam\u00e8tre \u00e0 la place des r\u00e9cepteurs \u00e9lectroniques habituels. L’occasion d’observer un syst\u00e8me stellaire c\u00e9l\u00e8bre, celui d’Alpha Centauri<\/em>.<\/p>\n

\"telescope_clay_magellan2\"<\/a><\/p>\n

La sc\u00e8ne se d\u00e9roule le soir du 3 mai \u00e0 l’Observatoire de Las Campanas, au Chili, sur l’un des t\u00e9lescopes Magellan, le t\u00e9lescope Clay (son jumeau est le t\u00e9lescope Baade<\/a>, r\u00e9cemment r\u00e9alumin\u00e9).<\/p>\n

Le programme des observateurs pr\u00e9sents sous la coupole consiste \u00e0 tester le fonctionnement de nouveaux r\u00e9cepteurs \u00e9lectroniques associ\u00e9s \u00e0 VISAO, un syst\u00e8me d’optique adaptative qui corrige 1000 fois par seconde les effets n\u00e9fastes de la turbulence atmosph\u00e9rique.<\/p>\n

\"telescope_clay_magellan3\"<\/a><\/p>\n

Accompagn\u00e9s par le photographe Yuri Beletsky<\/a>, les astronomes Laird Close, Katie Morzinski et Jared Males (auteur de l’article Eyepiece Observing With MagAO<\/em><\/a>) d\u00e9cident de mettre un oculaire pour se rendre compte \u00e0 l’\u0153il nu des capacit\u00e9s de VISAO. Le t\u00e9lescope est point\u00e9 en direction d’Alpha Centauri<\/em>, un syst\u00e8me compos\u00e9 de 3 \u00e9toiles ((Alpha Centauri A<\/em>, Alpha Centauri B<\/em> et Proxima Centauri<\/em>) et d’une plan\u00e8te rocheuse qui fait beaucoup parler d’elle (Alpha Centauri Bb<\/em><\/a>). Ils d\u00e9couvrent alors visuellement ce spectacle c\u00e9leste avec une r\u00e9solution record de 22 millisecondes d’arc !<\/p>\n

Jamais personne avant eux n’avait pu observer des astres avec une telle finesse ; depuis longtemps des r\u00e9cepteurs \u00e9lectroniques tr\u00e8s performants (tr\u00e8s sensibles, ils analysent la lumi\u00e8re des astres dans de nombreuses longueurs d’onde) ont en effet remplac\u00e9 les oculaires sur les t\u00e9lescopes g\u00e9ants.<\/p>\n","protected":false},"excerpt":{"rendered":"

Pour la premi\u00e8re fois, des astronomes professionnels ont mis leur\u00a0\u0153il \u00e0 l’oculaire d’un t\u00e9lescope g\u00e9ant de 6,5 m\u00e8tres de diam\u00e8tre \u00e0 la place des r\u00e9cepteurs \u00e9lectroniques habituels. L’occasion d’observer un syst\u00e8me stellaire c\u00e9l\u00e8bre, celui d’Alpha Centauri. La sc\u00e8ne se d\u00e9roule le soir du 3 mai \u00e0 l’Observatoire de Las Campanas, au Chili, sur l’un des … Continuer la lecture de R\u00e9solution record pour une observation visuelle<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":2714,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[1014,635,988,638,987,1410,1015,1016],"class_list":["post-2713","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-alpha-centauri","tag-chili","tag-observatoire-de-las-campanas","tag-optique-adaptative","tag-telescope-clay","tag-telescopes-magellan","tag-visao","tag-yuri-beletsky"],"yoast_head":"\nR\u00e9solution record pour une observation visuelle<\/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\/05\/13\/resolution-record-pour-une-observation-visuelle\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R\u00e9solution record pour une observation visuelle\" \/>\n<meta property=\"og:description\" content=\"Pour la premi\u00e8re fois, des astronomes professionnels ont mis leur\u00a0\u0153il \u00e0 l’oculaire d’un t\u00e9lescope g\u00e9ant de 6,5 m\u00e8tres de diam\u00e8tre \u00e0 la place des r\u00e9cepteurs \u00e9lectroniques habituels. 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La sc\u00e8ne se d\u00e9roule le soir du 3 mai \u00e0 l’Observatoire de Las Campanas, au Chili, sur l’un des … Continuer la lecture de R\u00e9solution record pour une observation visuelle →\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/\" \/>\n<meta property=\"og:site_name\" content=\"CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel\" \/>\n<meta property=\"article:published_time\" content=\"2015-05-13T05:49:06+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-12-15T14:16:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/telescope_clay_magellan1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"834\" \/>\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\/05\/13\/resolution-record-pour-une-observation-visuelle\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/\",\"name\":\"R\u00e9solution record pour une observation visuelle\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/telescope_clay_magellan1.jpg\",\"datePublished\":\"2015-05-13T05:49:06+00:00\",\"dateModified\":\"2015-12-15T14:16:21+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\/05\/13\/resolution-record-pour-une-observation-visuelle\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/13\/resolution-record-pour-une-observation-visuelle\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/telescope_clay_magellan1.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2015\/05\/telescope_clay_magellan1.jpg\",\"width\":1200,\"height\":834},{\"@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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