{"id":9925,"date":"2018-11-25T08:55:15","date_gmt":"2018-11-25T08:55:15","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9925"},"modified":"2018-12-05T08:19:27","modified_gmt":"2018-12-05T08:19:27","slug":"a-dijon-la-belle-renaissance-dun-observatoire-oublie","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/11\/25\/a-dijon-la-belle-renaissance-dun-observatoire-oublie\/","title":{"rendered":"\u00c0 Dijon, la belle renaissance d&#8217;un observatoire oubli\u00e9"},"content":{"rendered":"<p><strong>La Soci\u00e9t\u00e9 astronomique de Bourgogne fait revivre l&#8217;observatoire de la Tour Philippe Le Bon \u00e0 Dijon, un site scientifique renomm\u00e9 au XVIII\u00e8me si\u00e8cle.<\/strong><\/p>\n<p>Si vous d\u00e9ambulez dans <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/09\/09\/pleine-lune-dijon\/\" target=\"_blank\" rel=\"noopener\">Dijon<\/a>, vous ne manquerez pas de passer devant le Palais des ducs et des \u00e9tats de Bourgogne (qui abrite aujourd&#8217;hui la mairie et le mus\u00e9e des beaux-arts) dont la partie la plus ancienne date du XIV\u00e8me si\u00e8cle. Ce majestueux ensemble architectural est surmont\u00e9 par la Tour Philippe le Bon, haute de 46 m et construite entre 1450 et 1460. Depuis la terrasse situ\u00e9e \u00e0 son sommet auquel on acc\u00e8de apr\u00e8s avoir gravi les 316 marches d&#8217;un escalier en vis, on d\u00e9couvre l&#8217;ensemble de l&#8217;agglom\u00e9ration dijonnaise, voire beaucoup plus loin quand l&#8217;atmosph\u00e8re est d\u00e9gag\u00e9e.<\/p>\n<figure id=\"attachment_9926\" aria-describedby=\"caption-attachment-9926\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1.jpg\" rel=\"lightbox[9925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9926\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1-768x478.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1-1024x637.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour1.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9926\" class=\"wp-caption-text\">La Tour Philippe le Bon domine Dijon de ses 46 m\u00e8tres. Au XVIII\u00e8me si\u00e8cle les astronomes s&#8217;installaient sur sa terrasse pour arpenter le ciel. \u00a9 Jean-Baptiste Feldmann\/CIELMANIA<\/figcaption><\/figure>\n<p>C&#8217;est dans cette Tour que la <a href=\"https:\/\/www.sab-astro.fr\/\" target=\"_blank\" rel=\"noopener\">Soci\u00e9t\u00e9 Astronomique de Bourgogne<\/a> vous invite \u00e0 venir admirer une m\u00e9ridienne horizontale constitu\u00e9e d&#8217;une r\u00e8gle en laiton de plus de 8 m de longueur.<!--more--><\/p>\n<p>Au milieu de la journ\u00e9e un rayon de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/04\/27\/un-soleil-omega-se-leve-sur-la-mer-mediterranee\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a> (quand il y en a) entre par un orifice perc\u00e9 dans la fen\u00eatre sud et vient \u00e9clairer cette r\u00e8gle\u00a0; un jeu de lumi\u00e8re qui fournit l&#8217;heure solaire et permettait autrefois de r\u00e9gler des horloges alors peu pr\u00e9cises. On doit cette r\u00e9alisation \u00e0 l&#8217;Abb\u00e9 Jean Fabarel, grand chantre de la cath\u00e9drale de Dijon et passionn\u00e9 d&#8217;astronomie, qui d\u00e9cida \u00e0 cet endroit de la cr\u00e9ation d&#8217;un observatoire au XVIII\u00e8me si\u00e8cle.<\/p>\n<figure id=\"attachment_9927\" aria-describedby=\"caption-attachment-9927\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2.jpg\" rel=\"lightbox[9925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9927\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2-768x478.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2-1024x637.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour2.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9927\" class=\"wp-caption-text\">La SAB fait revivre (en costume) la belle histoire de la m\u00e9ridienne situ\u00e9e dans la Tour Philippe le Bon \u00e0 Dijon. \u00a9 Jean-Baptiste Feldmann\/CIELMANIA<\/figcaption><\/figure>\n<p>\u00c9paul\u00e9 par l&#8217;Abb\u00e9 Claude Philippe Bertrand qu&#8217;il a recrut\u00e9 pour le seconder, Fabarel va d\u00e9ployer des tr\u00e9sors de persuasion pour faire \u00e9quiper cet observatoire avec diff\u00e9rents instruments. Lunette m\u00e9ridienne et quart de cercle prennent place peu \u00e0 peu dans la salle et sur la terrasse pour permettre d&#8217;y pratiquer l&#8217;astronomie de position\u00a0; les tables dans lesquelles sont consign\u00e9es les mesures des passages d&#8217;\u00e9toiles au m\u00e9ridien de Dijon sont alors destin\u00e9es aux grands navigateurs pour leur permettre de retrouver leur position et aux arpenteurs que le roi charge de cartographier le pays.<\/p>\n<p>Inaugur\u00e9 en 1783, l&#8217;observatoire de Dijon devient un centre scientifique renomm\u00e9 dans toute l&#8217;Europe qui \u00e9change une riche correspondance avec les plus grands astronomes de l&#8217;\u00e9poque comme Joseph J\u00e9r\u00f4me Lefran\u00e7ois de Lalande (membre de l&#8217;Acad\u00e9mie des Sciences et du Coll\u00e8ge de France) ou encore l&#8217;anglais William Herschel (le d\u00e9couvreur d&#8217;<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/11\/20\/tempetes-geantes-sur-uranus\/\" target=\"_blank\" rel=\"noopener\">Uranus<\/a>) qui envoie m\u00eame l&#8217;un de ses t\u00e9lescopes \u00e0 Dijon.<\/p>\n<figure id=\"attachment_9929\" aria-describedby=\"caption-attachment-9929\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4.jpg\" rel=\"lightbox[9925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9929\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4-450x280.jpg\" alt=\"\" width=\"450\" height=\"280\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4-450x280.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4-768x477.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4-1024x636.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour4.jpg 1450w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9929\" class=\"wp-caption-text\">L&#8217;un des t\u00e9lescopes construits par William Herschel, celui de 1,22 m\u00e8tre de diam\u00e8tre, est visible \u00e0 l&#8217;Observatoire de Greenwich. \u00a9 Jean-Baptiste Feldmann\/CIELMANIA<\/figcaption><\/figure>\n<p>Apr\u00e8s la R\u00e9volution et la mort de Fabarel et Bertrand dans les ann\u00e9es qui suivent, l&#8217;Observatoire de Dijon s&#8217;endort et ne reprend vie que dans les ann\u00e9es 1920, port\u00e9 par un nouvel engouement pour l&#8217;observation du ciel qu&#8217;insuffle un peu partout <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/02\/26\/traces-de-lastronome-camille-flammarion\/\" target=\"_blank\" rel=\"noopener\">Camille Flammarion<\/a>, l&#8217;auteur d&#8217;une Astronomie populaire maintes fois r\u00e9\u00e9dit\u00e9e. A la veille de la Seconde Guerre mondiale, livres et instruments disparaissent de l&#8217;observatoire et la Tour se rendort une nouvelle fois.<\/p>\n<figure id=\"attachment_8929\" aria-describedby=\"caption-attachment-8929\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1.jpg\" rel=\"lightbox[9925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-8929\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1-450x299.jpg\" alt=\"\" width=\"450\" height=\"299\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1-450x299.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1-768x510.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1-1024x680.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/02\/saf1.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-8929\" class=\"wp-caption-text\">L&#8217;Astronomie Populaire est \u00e0 l&#8217;origine d&#8217;un regain d&#8217;int\u00e9r\u00eat pour l&#8217;Observatoire de la Tour Philippe le Bon au d\u00e9but du XX\u00e8me si\u00e8cle. \u00a9 Jean-Baptiste Feldmann\/CIELMANIA<\/figcaption><\/figure>\n<p>Il y a quelques ann\u00e9es la Soci\u00e9t\u00e9 Astronomique de Bourgogne a retrouv\u00e9 chez un brocanteur du sud de la France une <a href=\"https:\/\/www.sab-astro.fr\/69-groupes\/investigations\/fiches-lieux\/103-la-lunette-mailhat.html\" target=\"_blank\" rel=\"noopener\">lunette Mailhat<\/a>\u00a0en cuivre de 100 mm de diam\u00e8tre achet\u00e9e en 1925 par l\u2019Acad\u00e9mie des Sciences, Arts et Belles lettres de Dijon\u00a0: un pied fixe avait \u00e9t\u00e9 install\u00e9 sur la terrasse pour accueillir cet instrument.<\/p>\n<figure id=\"attachment_9928\" aria-describedby=\"caption-attachment-9928\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour3.jpg\" rel=\"lightbox[9925]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-9928\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour3-450x300.jpg\" alt=\"\" width=\"450\" height=\"300\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour3-450x300.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour3-768x512.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/11\/tour3.jpg 960w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-9928\" class=\"wp-caption-text\">Cette lunette Mailhat \u00e9quipait l&#8217;Observatoire de Dijon au d\u00e9but de XX\u00e8me si\u00e8cle. \u00a9 SAB\u00a0<\/figcaption><\/figure>\n<p>Une d\u00e9couverte qui a donn\u00e9 des id\u00e9es \u00e0 la SAB\u00a0: elle organise d\u00e9sormais des <a href=\"https:\/\/www.sab-astro.fr\/pour-le-public\/evenements-divers\/142-la-tour-astronomique.html\" target=\"_blank\" rel=\"noopener\">visites guid\u00e9es de la Tour<\/a> et tente de retrouver d&#8217;autres instruments qui \u00e9quipaient l&#8217;observatoire. Avec l&#8217;espoir de les remettre un jour dans la salle de la m\u00e9ridienne pour en faire profiter les visiteurs&#8230;<\/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>La Soci\u00e9t\u00e9 astronomique de Bourgogne fait revivre l&#8217;observatoire de la Tour Philippe Le Bon \u00e0 Dijon, un site scientifique renomm\u00e9 au XVIII\u00e8me si\u00e8cle. Si vous d\u00e9ambulez dans Dijon, vous ne manquerez pas de passer devant le Palais des ducs et des \u00e9tats de Bourgogne (qui abrite aujourd&#8217;hui la mairie et le mus\u00e9e des beaux-arts) dont &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/11\/25\/a-dijon-la-belle-renaissance-dun-observatoire-oublie\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c0 Dijon, la belle renaissance d&#8217;un observatoire oubli\u00e9<\/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":9927,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[2603,145,2602,2604,194,129],"class_list":["post-9925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-claude-philippe-bertrand","tag-dijon","tag-jean-fabarel","tag-joseph-jerome-lefrancois-de-lalande","tag-societe-astronomique-de-bourgogne","tag-william-herschel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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