{"id":783,"date":"2014-08-26T14:06:44","date_gmt":"2014-08-26T14:06:44","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=783"},"modified":"2014-09-11T05:37:12","modified_gmt":"2014-09-11T05:37:12","slug":"telescope-dobson","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/08\/26\/telescope-dobson\/","title":{"rendered":"Le t\u00e9lescope de Dobson"},"content":{"rendered":"

Les astronomes amateurs doivent une fi\u00e8re chandelle \u00e0 John Dobson (1915-2014). Jusqu’au d\u00e9but des ann\u00e9es 1970 les amoureux des \u00e9toiles <\/a>disposaient d’un choix restreint et co\u00fbteux en mati\u00e8re de t\u00e9lescopes <\/a>du commerce, les prix devenant exorbitants si l’on visait un diam\u00e8tre de miroir un peu cons\u00e9quent (les lunettes astronomiques<\/a> \u00e9tant encore plus co\u00fbteuses).<\/p>\n

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

C’est alors que l’astronome amateur am\u00e9ricain John Dobson proposa des t\u00e9lescopes de grand diam\u00e8tre \u00e0 des prix imbattables.<\/p>\n

Pour r\u00e9ussir ce pari, J. Dobson utilisa des mat\u00e9riaux de r\u00e9cup\u00e9ration pour construire la monture (azimutale) ainsi que le tube. Quant au miroir, il proposa de le tailler dans un disque de verre beaucoup moins \u00e9pais. Planches, clous, tuyau… et de nombreuses heures de bricolage permirent alors \u00e0 des amateurs de devenir les heureux propri\u00e9taires de t\u00e9lescopes de grand diam\u00e8tre.<\/p>\n

Le succ\u00e8s de ce concept fut tel que peu \u00e0 peu des soci\u00e9t\u00e9s propos\u00e8rent dans leurs catalogues des \u00ab\u00a0dobson\u00a0\u00bb. Aujourd’hui certains de ces instruments sont \u00e9quip\u00e9s de miroirs jusqu’\u00e0 1 m\u00e8tre de diam\u00e8tre\u00a0!<\/p>\n","protected":false},"excerpt":{"rendered":"

Les astronomes amateurs doivent une fi\u00e8re chandelle \u00e0 John Dobson (1915-2014). Jusqu’au d\u00e9but des ann\u00e9es 1970 les amoureux des \u00e9toiles disposaient d’un choix restreint et co\u00fbteux en mati\u00e8re de t\u00e9lescopes du commerce, les prix devenant exorbitants si l’on visait un diam\u00e8tre de miroir un peu cons\u00e9quent (les lunettes astronomiques \u00e9tant encore plus co\u00fbteuses). C’est alors … Continuer la lecture de Le t\u00e9lescope de Dobson<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":784,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[94,338,89,339,148,340,96,341],"class_list":["post-783","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-astronome","tag-dobson","tag-etoile","tag-john-dobson","tag-lunette-astronomique","tag-miroir","tag-telescope","tag-verre"],"yoast_head":"\ntelescope dobson<\/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\/2014\/08\/26\/telescope-dobson\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"telescope dobson\" \/>\n<meta property=\"og:description\" content=\"Les astronomes amateurs doivent une fi\u00e8re chandelle \u00e0 John Dobson (1915-2014). 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