{"id":9280,"date":"2018-08-20T10:44:50","date_gmt":"2018-08-20T10:44:50","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9280"},"modified":"2018-09-04T16:57:16","modified_gmt":"2018-09-04T16:57:16","slug":"dessin-astronomique-limposant-clavius","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/08\/20\/dessin-astronomique-limposant-clavius\/","title":{"rendered":"Dessin astronomique : l&#8217;imposant Clavius"},"content":{"rendered":"<p><strong>Du papier, des crayons, de la patience et un bon sens de l\u2019observation, voil\u00e0 ce qu\u2019il vous faut pour vous lancer dans le dessin astronomique.<\/strong><\/p>\n<p>Apr\u00e8s avoir dessin\u00e9 la\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/04\/29\/dessin-astronomique-cote-de-mer-nectar\/\" target=\"_blank\" rel=\"noopener\">Mer du Nectar<\/a>\u00a0et le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/05\/22\/dessin-astronomique-cratere-lunaire-deslandres\/\" target=\"_blank\" rel=\"noopener\">crat\u00e8re Deslandres<\/a>, je vous propose de retrouver l&#8217;imposant Clavius, une immense plaine mur\u00e9e. Ce dessin a \u00e9t\u00e9 r\u00e9alis\u00e9 le 24 mai 2018 au neuvi\u00e8me jour de la lunaison avec\u00a0une\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener\">longue-vue<\/a>\u00a0Bresser de 100 mm de diam\u00e8tre dot\u00e9e d\u2019un grossissement de 75 fois.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2.jpg\" rel=\"lightbox[9280]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9281\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2-450x306.jpg\" alt=\"\" width=\"450\" height=\"306\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2-450x306.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2-768x522.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2-1024x696.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/clavius2.jpg 1325w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>La technique est la suivante :<\/p>\n<ul>\n<li>faire un croquis derri\u00e8re l\u2019oculaire pendant une trentaine de minutes avec une cotation pour indiquer les zones blanches, grises et noires.<\/li>\n<li>Reprendre le croquis ult\u00e9rieurement pour r\u00e9aliser un dessin plus r\u00e9aliste<\/li>\n<li>scanner le dessin, mettre en place un fond gris et reprendre les parties \u00e0 blanchir ou \u00e0 noircir avant d\u2019ajouter les noms, tout cela avec le logiciel PhotoFiltre<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<p>Voici le comte-rendu qui accompagne le dessin :<\/p>\n<p><em>Avec 225 km de diam\u00e8tre, <strong>Clavius<\/strong> est l&#8217;une des plus grandes plaines mur\u00e9es lunaires. Situ\u00e9e au SUD de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/10\/12\/cratere-lunaire-tycho\/\" target=\"_blank\" rel=\"noopener\"><strong>Tycho<\/strong> <\/a>(non loin du p\u00f4le SUD) dans une r\u00e9gion fortement crat\u00e9ris\u00e9e, cette vieille formation aux contours polygonaux compte de nombreux crat\u00e8res plus r\u00e9cents, que ce soit sur le fond de l&#8217;ar\u00e8ne ou sur ses remparts d\u00e9labr\u00e9s. L&#8217;enceinte de <strong>Clavius<\/strong> est tellement \u00e9rod\u00e9e qu&#8217;elle ne s&#8217;\u00e9l\u00e8ve pratiquement pas au-dessus du sol environnant. Remarquez au fond de l&#8217;ar\u00e8ne la disposition en arc de cercle des crat\u00e8res de taille d\u00e9croissante \u00e0 partir de <strong>Rutherfurd<\/strong> (situ\u00e9 \u00e0 cheval sur le rempart SUD-EST). Notez \u00e9galement la pr\u00e9sence d&#8217;un petit massif montagneux central. Deux crat\u00e8res importants sont visibles au SUD-OUEST de <strong>Clavius\u00a0<\/strong>: <strong>Blancanus<\/strong> (105 km de diam\u00e8tre) et <strong>Scheiner<\/strong> (110 km) dont le fond est encore plong\u00e9 dans la nuit.<\/em><\/p>\n<p>Carte de rep\u00e9rage d\u2019apr\u00e8s un dessin de\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/07\/31\/michel-deconinck-laquarelliste-ciel-nocturne\/\" target=\"_blank\" rel=\"noopener\">Michel Deconinck<\/a>\u00a0:<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius.jpg\" rel=\"lightbox[9280]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9282\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius-447x450.jpg\" alt=\"\" width=\"447\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius-447x450.jpg 447w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius-150x150.jpg 150w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius-768x772.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius-1018x1024.jpg 1018w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2018\/05\/plune-clavius.jpg 1200w\" sizes=\"auto, (max-width: 447px) 100vw, 447px\" \/><\/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>Du papier, des crayons, de la patience et un bon sens de l\u2019observation, voil\u00e0 ce qu\u2019il vous faut pour vous lancer dans le dessin astronomique. Apr\u00e8s avoir dessin\u00e9 la\u00a0Mer du Nectar\u00a0et le crat\u00e8re Deslandres, je vous propose de retrouver l&#8217;imposant Clavius, une immense plaine mur\u00e9e. Ce dessin a \u00e9t\u00e9 r\u00e9alis\u00e9 le 24 mai 2018 au &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/08\/20\/dessin-astronomique-limposant-clavius\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Dessin astronomique : l&#8217;imposant Clavius<\/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":9281,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[83],"tags":[472,1340,2338,82],"class_list":["post-9280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-la-lune","tag-clavius","tag-dessin","tag-longue-vue","tag-lune"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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