{"id":18925,"date":"2024-01-26T17:56:01","date_gmt":"2024-01-26T17:56:01","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=18925"},"modified":"2024-02-08T17:03:58","modified_gmt":"2024-02-08T17:03:58","slug":"le-telescope-geant-du-mont-palomar-fete-ses-75-ans","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/01\/26\/le-telescope-geant-du-mont-palomar-fete-ses-75-ans\/","title":{"rendered":"Le t\u00e9lescope g\u00e9ant du Mont Palomar f\u00eate ses 75 ans"},"content":{"rendered":"<p><strong>Il y a 75 ans, le 26 janvier 1949, le t\u00e9lescope g\u00e9ant du Mont Palomar (miroir de 5 m\u00e8tres de diam\u00e8tre) recevait sa premi\u00e8re lumi\u00e8re.\u00a0<\/strong><\/p>\n<h5>Le projet d&#8217;un visionnaire :<\/h5>\n<p>Le t\u00e9lescope de 5 m\u00e8tres de diam\u00e8tre du Mont Palomar doit beaucoup \u00e0 <a href=\"https:\/\/www.astro.umontreal.ca\/~paulchar\/grps\/histoire\/newsite\/bio\/hale_f.html\" target=\"_blank\" rel=\"noopener\">George Ellery Hale<\/a> (1868-1938). Cet astronome am\u00e9ricain lan\u00e7a l&#8217;id\u00e9e de la construction d&#8217;un t\u00e9lescope g\u00e9ant dans\u00a0les ann\u00e9es 1920.<\/p>\n<figure id=\"attachment_18927\" aria-describedby=\"caption-attachment-18927\" style=\"width: 362px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar2.jpg\" rel=\"lightbox[18925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18927\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar2-362x450.jpg\" alt=\"\" width=\"362\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar2-362x450.jpg 362w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar2.jpg 443w\" sizes=\"auto, (max-width: 362px) 100vw, 362px\" \/><\/a><figcaption id=\"caption-attachment-18927\" class=\"wp-caption-text\">L&#8217;astronome am\u00e9ricain George Ellery Hale. \u00a9 Palomar\/Caltech<\/figcaption><\/figure>\n<p>\u00c0 l&#8217;\u00e9poque, le plus grand t\u00e9lescope du monde (t\u00e9lescope Hooker de 2,5 m\u00e8tres) se trouvait au <a href=\"https:\/\/www.mtwilson.edu\/\" target=\"_blank\" rel=\"noopener\">Mont Wilson<\/a>. Le projet de George Ellery Hale prit v\u00e9ritablement forme \u00e0 partir de 1928 avec une subvention de 6 millions de dollars de la <a href=\"https:\/\/www.rockefellerfoundation.org\/\" target=\"_blank\" rel=\"noopener\">Fondation Rockefeller<\/a>. Le miroir fut coul\u00e9 et taill\u00e9 entre 1933 et 1936.<\/p>\n<figure id=\"attachment_18928\" aria-describedby=\"caption-attachment-18928\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar3.jpg\" rel=\"lightbox[18925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18928\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar3-450x351.jpg\" alt=\"\" width=\"450\" height=\"351\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar3-450x351.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar3.jpg 644w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18928\" class=\"wp-caption-text\">Premi\u00e8re tentative de coulage du miroir en 1934.\u00a9 Palomar\/Caltech<\/figcaption><\/figure>\n<p>Pendant ce temps, Hale avait d\u00e9nich\u00e9 le site id\u00e9al pour accueillir le futur t\u00e9lescope. Il se trouvait dans les montagnes au Nord du comt\u00e9 de San Diego, en Californie. \u00c0 cette \u00e9poque, le ciel nocturne y \u00e9tait particuli\u00e8rement noir.<!--more--><\/p>\n<h5>Construction d&#8217;un g\u00e9ant :<\/h5>\n<p>Une fois le terrain achet\u00e9 en 1934, les travaux commenc\u00e8rent. Ils dur\u00e8rent cinq ans, et le 11 avril 1939, le b\u00e2timent, la coupole et le t\u00e9lescope sans son miroir \u00e9taient termin\u00e9s. George Ellery Hale \u00e9tait mort un an plus t\u00f4t.<\/p>\n<figure id=\"attachment_18929\" aria-describedby=\"caption-attachment-18929\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar4.jpg\" rel=\"lightbox[18925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18929\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar4-450x356.jpg\" alt=\"\" width=\"450\" height=\"356\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar4-450x356.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar4-768x607.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar4.jpg 870w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18929\" class=\"wp-caption-text\">Construction de la monture et du t\u00e9lescope en 1939. \u00a9 Palomar\/Caltech<\/figcaption><\/figure>\n<p>En raison de la Seconde guerre mondiale, les travaux furent stopp\u00e9s. Il fallut attendre novembre 1947 pour voir le miroir rejoindre l&#8217;Observatoire du Mont Palomar par la route. Le t\u00e9lescope Hale fut inaugur\u00e9 le 3 juin 1948 et re\u00e7ut sa premi\u00e8re lumi\u00e8re sept mois plus tard.<\/p>\n<figure id=\"attachment_18930\" aria-describedby=\"caption-attachment-18930\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar5.jpg\" rel=\"lightbox[18925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18930\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar5-450x359.jpg\" alt=\"\" width=\"450\" height=\"359\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar5-450x359.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar5-768x613.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar5.jpg 864w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-18930\" class=\"wp-caption-text\">Transport du miroir de 5 m\u00e8tres en 1947.\u00a9 Palomar\/Caltech<\/figcaption><\/figure>\n<p>Le 26 janvier 1949, l&#8217;astronome <a href=\"https:\/\/www.futura-sciences.com\/sciences\/personnalites\/astronomie-edwin-hubble-715\/\" target=\"_blank\" rel=\"noopener\">Edwin Hubble<\/a> r\u00e9alisa la premi\u00e8re image. Pour l&#8217;occasion, il photographia la n\u00e9buleuse <a href=\"https:\/\/esahubble.org\/images\/opo9935c\/\" target=\"_blank\" rel=\"noopener\">NGC 2261<\/a> dans la constellation de la Licorne. La taille de ce t\u00e9lescope permettait \u00e0 l&#8217;observateur de se tenir perch\u00e9 dans la cage situ\u00e9e \u00e0 l&#8217;int\u00e9rieur du tube. Le t\u00e9lescope Hale resta le plus grand du monde jusqu&#8217;en 1976 et l&#8217;inauguration du t\u00e9lescope russe (<a href=\"https:\/\/www.sao.ru\/Doc-en\/Telescopes\/bta\/descrip.html\" target=\"_blank\" rel=\"noopener\">BTA<\/a>) de 6 m\u00e8tres de diam\u00e8tre.<\/p>\n<figure id=\"attachment_18931\" aria-describedby=\"caption-attachment-18931\" style=\"width: 377px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar7.jpg\" rel=\"lightbox[18925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-18931\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar7-377x450.jpg\" alt=\"\" width=\"377\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar7-377x450.jpg 377w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/01\/palomar7.jpg 582w\" sizes=\"auto, (max-width: 377px) 100vw, 377px\" \/><\/a><figcaption id=\"caption-attachment-18931\" class=\"wp-caption-text\">L&#8217;astronome E. Hubble dans la cage du t\u00e9lescope Hale. \u00a9 Palomar\/Caltech<\/figcaption><\/figure>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/03\/11\/la-camera-acs-du-telescope-hubble-fete-ses-20-ans\/\" target=\"_blank\" rel=\"noopener\">La cam\u00e9ra (ACS) du t\u00e9lescope Hubble f\u00eate ses 20 ans<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/03\/11\/les-tresors-photographiques-oublies-de-lobservatoire-de-copenhague\/\" target=\"_blank\" rel=\"noopener\">Les tr\u00e9sors oubli\u00e9s de l&#8217;Observatoire de Copenhague<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/25\/leclipse-deinstein-fete-ses-100-ans\/\" target=\"_blank\" rel=\"noopener\">L&#8217;\u00e9clipse d&#8217;Einstein f\u00eate ses 100 ans<\/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>Il y a 75 ans, le 26 janvier 1949, le t\u00e9lescope g\u00e9ant du Mont Palomar (miroir de 5 m\u00e8tres de diam\u00e8tre) recevait sa premi\u00e8re lumi\u00e8re.\u00a0 Le projet d&#8217;un visionnaire : Le t\u00e9lescope de 5 m\u00e8tres de diam\u00e8tre du Mont Palomar doit beaucoup \u00e0 George Ellery Hale (1868-1938). Cet astronome am\u00e9ricain lan\u00e7a l&#8217;id\u00e9e de la construction &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/01\/26\/le-telescope-geant-du-mont-palomar-fete-ses-75-ans\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Le t\u00e9lescope g\u00e9ant du Mont Palomar f\u00eate ses 75 ans<\/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":18926,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[740,2494,744,1195],"class_list":["post-18925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-edwin-powell-hubble","tag-george-ellery-hale","tag-mont-palomar","tag-telescope-hale"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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