{"id":152,"date":"2017-04-01T00:25:52","date_gmt":"2017-03-31T22:25:52","guid":{"rendered":"http:\/\/gap47.astrosurf.com\/?page_id=152"},"modified":"2025-01-07T20:12:50","modified_gmt":"2025-01-07T18:12:50","slug":"lunettes-astronomiques","status":"publish","type":"page","link":"https:\/\/gap47.astrosurf.com\/index.php\/le-gap47\/materiel\/lunettes-astronomiques\/","title":{"rendered":"Lunettes astronomiques"},"content":{"rendered":"<p><span style=\"font-family: times new roman,times,serif; font-size: 20px;\">Nous disposons au GAP47 de plusieurs lunettes astronomiques. La plupart appartiennent \u00e0 des membres qui les mettent \u00e0 la disposition du club en cas de besoin.<\/span><\/p>\n<p><span style=\"font-size: 20px;\"><strong><span style=\"font-family: times new roman,times,serif;\">\u2022 Orion 80 ED &#8211; 600 mm<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: 20px;\"><strong><span style=\"font-family: times new roman,times,serif;\">\u2022 SkyWatcher 120 mm 1000 mm<\/span><\/strong><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif; font-size: 20px;\"><em>Une petite lunette Bresser (70-700 mm) achet\u00e9e chez Lidl, nous sert pour des explications d&rsquo;optique et comme mod\u00e8le d&rsquo;instrument pour d\u00e9butant \u2193<\/em><br \/>\n<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif; font-size: 20px;\"><a href=\"http:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2956 size-full\" src=\"http:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl.jpg\" alt=\"\" width=\"1000\" height=\"1333\" srcset=\"https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl.jpg 1000w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl-225x300.jpg 225w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl-768x1024.jpg 768w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/Lunette-Lidl-900x1200.jpg 900w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif; font-size: 20px;\"><em>Nous avons \u00e9galement une reproduction d&rsquo;une des lunettes de Galil\u00e9e, fabriqu\u00e9e au club :<\/em><br \/>\n<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif; font-size: 20px;\"><a href=\"http:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/72aaf12cd3_galilee_lunette_Istituto_e_Museo_di_Storia_della_Scienza_Florence.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2391 size-full\" src=\"http:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/72aaf12cd3_galilee_lunette_Istituto_e_Museo_di_Storia_della_Scienza_Florence.jpg\" alt=\"\" width=\"1280\" height=\"893\" srcset=\"https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/72aaf12cd3_galilee_lunette_Istituto_e_Museo_di_Storia_della_Scienza_Florence.jpg 1280w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/72aaf12cd3_galilee_lunette_Istituto_e_Museo_di_Storia_della_Scienza_Florence-300x209.jpg 300w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/72aaf12cd3_galilee_lunette_Istituto_e_Museo_di_Storia_della_Scienza_Florence-768x536.jpg 768w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif;\"><em><span style=\"font-size: 20px;\">\u2191&nbsp;L&rsquo;une des premi\u00e8res lunettes astronomiques de Galil\u00e9e. Il fut le premier \u00e0 observer le ciel avec ce type d&rsquo;instrument, en 1609. Nous avons, au GAP47, une r\u00e9plique de sa premi\u00e8re lunette \u2193<\/span><br \/>\n<\/em><\/span><\/p>\n<p><em><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2959 aligncenter\" src=\"http:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/LunetteGalile\u0301e-1.jpg\" alt=\"\" width=\"800\" height=\"1308\" srcset=\"https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/LunetteGalile\u0301e-1.jpg 800w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/LunetteGalile\u0301e-1-183x300.jpg 183w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/LunetteGalile\u0301e-1-768x1256.jpg 768w, https:\/\/gap47.astrosurf.com\/wp-content\/uploads\/2017\/04\/LunetteGalile\u0301e-1-734x1200.jpg 734w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/em><\/p>\n<p style=\"text-align: center;\"><span style=\"font-family: times new roman,times,serif; font-size: 20px;\">Certaines de nos lunettes sont sp\u00e9cialis\u00e9es (voir lunette H-alpha et Coronographe).<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 20px;\"><strong><span style=\"font-family: arial,helvetica,sans-serif;\">Un peu de th\u00e9orie :<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-family: times new roman,times,serif; font-size: 20px;\">Une lunette est compos\u00e9e d\u2019une lentille objectif et d\u2019un oculaire dispos\u00e9s aux deux extr\u00e9mit\u00e9s d\u2019un tube ferm\u00e9. Le tube peut \u00eatre fixe ou t\u00e9lescopique comme dans le cas des longues-vues de marine. L\u2019oculaire se situe, comme l\u2019indique son nom, du c\u00f4t\u00e9 de l\u2019\u0153il, et il est de petite dimension. L\u2019objectif se situe \u00e0 l&rsquo;autre extr\u00e9mit\u00e9, du c\u00f4t\u00e9 de l&rsquo;objet. Cette lentille d&rsquo;entr\u00e9e donne \u00e0 l&rsquo;instrument sa capacit\u00e9 \u00e0 collecter de la lumi\u00e8re. L&rsquo;oculaire grossit l&rsquo;image form\u00e9e par le faisceau lumineux issu de l&rsquo;objectif.<\/span><\/p>\n<p><span style=\"font-family: times new roman,times,serif; font-size: 20px;\">La lunette astronomique donne de l&rsquo;objet observ\u00e9 une image enti\u00e8rement invers\u00e9e (droite-gauche et haut-bas). L&rsquo;utilisation habituelle d&rsquo;un renvoi coud\u00e9 (miroir plan inclin\u00e9 \u00e0 45\u00b0) redresse partiellement cette image qui ne subit plus qu&rsquo;une inversion droite-gauche.<\/span><\/p>\n<p><span style=\"font-family: times new roman,times,serif; font-size: 20px;\">Ces premi\u00e8res lunettes <em>d\u2019approche<\/em>, terrestre ou astronomique, ont poss\u00e9d\u00e9 un objectif convexe et un oculaire concave (Galil\u00e9e, Ren\u00e9 Descartes) d\u00fb aux circonstances de leur invention par des lunetiers. Elles avaient un champ d&rsquo;observation tr\u00e8s r\u00e9duit mais donnaient des images non invers\u00e9es.&nbsp;<\/span><\/p>\n<hr>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous disposons au GAP47 de plusieurs lunettes astronomiques. La plupart appartiennent \u00e0 des membres qui les mettent \u00e0 la disposition du club en cas de besoin. \u2022 Orion 80 ED &#8211; 600 mm \u2022 SkyWatcher 120 mm 1000 mm Une petite lunette Bresser (70-700 mm) achet\u00e9e chez Lidl, nous sert pour des explications d&rsquo;optique et &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/gap47.astrosurf.com\/index.php\/le-gap47\/materiel\/lunettes-astronomiques\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;Lunettes astronomiques&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":5,"featured_media":0,"parent":51,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-152","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Lunettes astronomiques - L&#039;observatoire est ouvert aux visiteurs tous les vendredis soirs \u00e0 21 heures, jusqu&#039;au 3 juillet 2026 inclus, sans r\u00e9servation.<\/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:\/\/gap47.astrosurf.com\/index.php\/le-gap47\/materiel\/lunettes-astronomiques\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lunettes astronomiques - L&#039;observatoire est ouvert aux visiteurs tous les vendredis soirs \u00e0 21 heures, jusqu&#039;au 3 juillet 2026 inclus, sans r\u00e9servation.\" \/>\n<meta property=\"og:description\" content=\"Nous disposons au GAP47 de plusieurs lunettes astronomiques. 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