{"id":23285,"date":"2026-10-06T16:18:10","date_gmt":"2026-10-06T16:18:10","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=23285"},"modified":"2026-10-06T16:29:03","modified_gmt":"2026-10-06T16:29:03","slug":"loptique-adaptative-booste-le-telescope-keck","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/10\/06\/loptique-adaptative-booste-le-telescope-keck\/","title":{"rendered":"L&#8217;optique adaptative booste le t\u00e9lescope Keck"},"content":{"rendered":"<p><strong>Gr\u00e2ce aux progr\u00e8s de l&#8217;optique adaptative, les t\u00e9lescopes terrestres ne cessent d&#8217;am\u00e9liorer leurs performances.\u00a0<\/strong><\/p>\n<h5>S&#8217;affranchir de la turbulence atmosph\u00e9rique :<\/h5>\n<p>Depuis plus de trente ans, l&#8217;optique adaptative (OA) r\u00e9volutionne l&#8217;astronomie terrestre. On doit \u00e0 <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Horace_W._Babcock\" target=\"_blank\" rel=\"noopener\">Horace W. Babcock<\/a> d&#8217;en avoir imagin\u00e9 le principe en 1953. Mais la technologie de l&#8217;\u00e9poque ne permettait pas de la mettre en pratique. D\u00e9velopp\u00e9e \u00e0 partir des ann\u00e9es 1970 pour les besoins militaires, l&#8217;OA fait son entr\u00e9e dans le monde de l&#8217;astronomie vingt ans plus tard. Mais de quoi parle-t-on exactement ? Pour en savoir plus, je vous invite \u00e0 regarder cette vid\u00e9o propos\u00e9e par <a href=\"https:\/\/www.youtube.com\/@GuillaumeDoyen\" target=\"_blank\" rel=\"noopener\">AstroGuigeek<\/a> :<\/p>\n<p><iframe loading=\"lazy\" title=\"L&#039;OPTIQUE ADAPTATIVE en ASTRONOMIE : C&#039;est qu&#039;OA ?\" width=\"474\" height=\"267\" src=\"https:\/\/www.youtube.com\/embed\/_kPTfsmWDN4?start=268&#038;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>Aujourd&#8217;hui, tous les grands t\u00e9lescopes sont \u00e9quip\u00e9s d&#8217;une OA, leur permettant de rivaliser avec les t\u00e9lescopes en orbite. Derni\u00e8re d\u00e9monstration en date, celle du t\u00e9lescope <a href=\"https:\/\/www.universalis.fr\/encyclopedie\/keck-telescopes\/2-un-puissant-observatoire\/\" target=\"_blank\" rel=\"noopener\">Keck II<\/a>. Ce g\u00e9ant, dont le miroir mesure dix m\u00e8tres de diam\u00e8tre, est install\u00e9 avec son jumeau au sommet du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Mauna_Kea\" target=\"_blank\" rel=\"noopener\">Mauna Kea<\/a>, un volcan endormi sur l&#8217;\u00eele Hawaii. Le t\u00e9lescope a vis\u00e9 la r\u00e9gion du<a href=\"https:\/\/en.wikipedia.org\/wiki\/Klaproth_(crater)\" target=\"_blank\" rel=\"noopener\"> crat\u00e8re Klaproth<\/a>, non loin du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/P%C3%B4le_Sud_de_la_Lune\" target=\"_blank\" rel=\"noopener\">p\u00f4le Sud lunaire<\/a>. Ce dernier attise les convoitises, en raison de la glace d&#8217;eau pi\u00e9g\u00e9e au fond de ses crat\u00e8res :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck.jpg\" rel=\"lightbox[23285]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-23286\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck-768x460.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2026\/10\/keck.jpg 1501w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les deux clich\u00e9s ont \u00e9t\u00e9 pris \u00e0 quelques minutes d&#8217;intervalle seulement, illustrant parfaitement la puissance de l&#8217;optique adaptative. Gr\u00e2ce \u00e0 son usage, le Keck II a pu distinguer des d\u00e9tails d&#8217;environ 135 m\u00e8tres de large. Cette performance rivalise avec la r\u00e9solution du <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Hubble_(t%C3%A9lescope_spatial)\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope spatial Hubble<\/a>, ou encore de la cam\u00e9ra grand angle de la <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Lunar_Reconnaissance_Orbiter\" target=\"_blank\" rel=\"noopener\">sonde LRO<\/a>. Ce clich\u00e9 fait d\u00e9sormais partie des images infrarouges de la Lune les plus pr\u00e9cises jamais obtenues depuis le sol.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/02\/25\/a-lobservatoire-dodessa-la-science-face-a-la-guerre\/\" target=\"_blank\" rel=\"noopener\">\u00c0 l\u2019Observatoire d\u2019Odessa, la science face \u00e0 la guerre<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2025\/08\/21\/insolite-de-la-neige-a-lobservatoire-de-las-campanas\/\" target=\"_blank\" rel=\"noopener\">Insolite : de la neige \u00e0 l\u2019Observatoire de Las Campanas<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/12\/21\/observatoire-yerkes-au-bonheur-des-dames\/\" target=\"_blank\" rel=\"noopener\">Observatoire Yerkes : au bonheur des dames<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/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>Gr\u00e2ce aux progr\u00e8s de l&#8217;optique adaptative, les t\u00e9lescopes terrestres ne cessent d&#8217;am\u00e9liorer leurs performances.\u00a0 S&#8217;affranchir de la turbulence atmosph\u00e9rique : Depuis plus de trente ans, l&#8217;optique adaptative (OA) r\u00e9volutionne l&#8217;astronomie terrestre. On doit \u00e0 Horace W. Babcock d&#8217;en avoir imagin\u00e9 le principe en 1953. Mais la technologie de l&#8217;\u00e9poque ne permettait pas de la mettre &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2026\/10\/06\/loptique-adaptative-booste-le-telescope-keck\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">L&#8217;optique adaptative booste le t\u00e9lescope Keck<\/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":23286,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[4026,4027,4025,638,4028,2457],"class_list":["post-23285","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-astroguigeek","tag-cratere-klaproth","tag-horace-w-babcock","tag-optique-adaptative","tag-pole-sud-lunaire","tag-telescopes-keck"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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