{"id":9201,"date":"2018-05-06T08:48:57","date_gmt":"2018-05-06T08:48:57","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9201"},"modified":"2018-05-15T18:59:50","modified_gmt":"2018-05-15T18:59:50","slug":"clair-de-vieille-lune-eglise-bresse","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/06\/clair-de-vieille-lune-eglise-bresse\/","title":{"rendered":"Clair de vieille Lune sur une \u00e9glise en Bresse"},"content":{"rendered":"<p><strong>Petite sortie nocturne dans le village de Montjay en Bresse pour y admirer le ciel nocturne \u00e9clair\u00e9 par la vieille Lune d\u00e9croissante.<\/strong><\/p>\n<p>Le petit village de Montjay, qui fait partie de la Bresse louhannaise (dont le c\u0153ur est la ville de Louhans), a la bonne id\u00e9e d&#8217;\u00e9teindre ses lampadaires entre 23 h et 5 h du matin, r\u00e9v\u00e9lant par la m\u00eame occasion un joli ciel nocturne encore \u00e9pargn\u00e9 par la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/09\/25\/pollution-lumineuse-france-peut-faire-beaucoup-mieux\/\" target=\"_blank\" rel=\"noopener\">pollution lumineuse<\/a> (on ne compte que des petits villages sur plusieurs kilom\u00e8tres \u00e0 la ronde).<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse.jpg\" rel=\"lightbox[9201]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9202\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse-450x294.jpg\" alt=\"\" width=\"450\" height=\"294\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse-450x294.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse-768x502.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse-1024x670.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/bresse.jpg 1376w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>La seule source de lumi\u00e8re nocturne est donc la Lune, comme on peut le constater sur cette image r\u00e9alis\u00e9e le 5 mai vers 3 h du matin (30 sec de pose \u00e0 3200 iso avec un objectif de 12 mm de focale).<!--more--><\/p>\n<p>\u00c0 gauche du clocher de l&#8217;\u00e9glise de Montjay vous reconna\u00eetrez sans peine la c\u00e9l\u00e8bre <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/03\/27\/41ptuttle-giacobini-kresak-une-comete-dans-la-grande-ourse\/\" target=\"_blank\" rel=\"noopener\">constellation de la Grande Ourse<\/a>.\u00a0Troisi\u00e8me plus grande constellation du ciel, elle est souvent r\u00e9duite \u00e0 ses sept \u00e9toiles les plus brillantes dont la forme \u00e9voque une casserole : les \u00e9toiles du manche sont Alka\u00efd, Mizar et Alioth, celles du r\u00e9cipient sont Megrez, Phecda, Merak et Dubhe.<\/p>\n<p>Cette\u00a0constellation (qui fait partie des 48 constellations identifi\u00e9es par l\u2019astronome grec Claude Ptol\u00e9m\u00e9e au 2\u00e8me si\u00e8cle apr\u00e8s J.-C.) est circumpolaire depuis nos latitudes, ce qui signifie qu\u2019elle ne se couche jamais. C\u2019est le privil\u00e8ge des constellations situ\u00e9es \u00e0 proximit\u00e9 du p\u00f4le nord c\u00e9leste qui n\u2019est pas tr\u00e8s loin : si vous tracez une droite imaginaire entre Merak et Dubhe et que vous la prolongez 5 fois, vous arrivez \u00e0 l\u2019<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/31\/astuce-comment-reperer-la-celebre-etoile-polaire\/\" target=\"_blank\" rel=\"noopener\">\u00e9toile polaire<\/a> (\u00e0 droite du clocher).\u00a0Notez enfin que la seconde \u00e9toile du manche, Mizar, est accompagn\u00e9e d\u2019une autre \u00e9toile un peu plus faible, Alcor, que l\u2019on peut deviner avec une bonne vue.<\/p>\n<p>Sur la droite de ce clich\u00e9 on remarque \u00e9galement que la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/11\/20\/portugal-couvent-dorada-sous-la-voie-lactee\/\" target=\"_blank\" rel=\"noopener\">Voie lact\u00e9e<\/a> s&#8217;est lev\u00e9e : si elle reste discr\u00e8te, c&#8217;est tout simplement que l&#8217;\u00e9clat lunaire \u00e9claircit le ciel. Notre satellite naturel se trouve \u00e0 ce moment dans le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/03\/19\/planete-mars-milieu-nebuleuses-sagittaire\/\" target=\"_blank\" rel=\"noopener\">Sagittaire<\/a> entre les plan\u00e8tes <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/04\/04\/saturne-mars-duo-planetaire-a-laube\/\" target=\"_blank\" rel=\"noopener\">Saturne et Mars<\/a>, et sa luminosit\u00e9 est encore tr\u00e8s importante, cinq jours seulement apr\u00e8s la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/02\/28\/frequence-mois-pleine-lune\/\" target=\"_blank\" rel=\"noopener\">Pleine Lune<\/a> des fleurs.<\/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>Petite sortie nocturne dans le village de Montjay en Bresse pour y admirer le ciel nocturne \u00e9clair\u00e9 par la vieille Lune d\u00e9croissante. Le petit village de Montjay, qui fait partie de la Bresse louhannaise (dont le c\u0153ur est la ville de Louhans), a la bonne id\u00e9e d&#8217;\u00e9teindre ses lampadaires entre 23 h et 5 h &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/06\/clair-de-vieille-lune-eglise-bresse\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Clair de vieille Lune sur une \u00e9glise en Bresse<\/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":9202,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[1198,456,98,2514,2515,1032],"class_list":["post-9201","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-bresse","tag-constellation-de-la-grande-ourse","tag-etoile-polaire","tag-louhans","tag-montjay","tag-vieille-lune"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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