{"id":20304,"date":"2024-12-17T17:13:53","date_gmt":"2024-12-17T17:13:53","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=20304"},"modified":"2025-01-11T10:22:07","modified_gmt":"2025-01-11T10:22:07","slug":"la-lune-en-couleurs-letonnant-dessin-de-lucien-rudaux","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/12\/17\/la-lune-en-couleurs-letonnant-dessin-de-lucien-rudaux\/","title":{"rendered":"La Lune en couleurs, l&#8217;\u00e9tonnant dessin de Lucien Rudaux"},"content":{"rendered":"<p><strong>Parmi les nombreuses recherches qu&#8217;il mena, Lucien Rudaux consacra plusieurs d\u00e9cennies \u00e0 \u00e9tudier les couleurs de la Lune.<\/strong><\/p>\n<h5><strong>Les multiples facettes d&#8217;un passionn\u00e9 :\u00a0<\/strong><\/h5>\n<p>Lucien Rudaux, l&#8217;astronome de Donville, aurait eu 150 ans cette ann\u00e9e. Voici le portrait qu&#8217;en dresse la <a href=\"https:\/\/saf-astronomie.fr\/\" target=\"_blank\" rel=\"noopener\">Soci\u00e9t\u00e9 Astronomique de France <\/a>: &#8221; <em>Lucien Rudaux (1874-1947), \u00ab l\u2019astronome de Donville \u00bb, fut un brillant amateur de sciences dont la notori\u00e9t\u00e9 a largement d\u00e9pass\u00e9 les limites de l\u2019Hexagone durant la premi\u00e8re moiti\u00e9 du XXe si\u00e8cle. Curieux et avide de savoirs, il se consacra avec enthousiasme \u00e0 la fois \u00e0 l\u2019astronomie, \u00e0 la m\u00e9t\u00e9orologie, \u00e0 la physique du globe ou encore \u00e0 la sp\u00e9l\u00e9ologie gr\u00e2ce auxquelles il c\u00f4toya les grandes figures scientifiques de son \u00e9poque telles que <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/02\/26\/traces-de-lastronome-camille-flammarion\/\" target=\"_blank\" rel=\"noopener\">Camille Flammarion<\/a>, <a href=\"https:\/\/www.ville-pontoise.fr\/edouard-alfred-martel-pere-de-la-speleologie\" target=\"_blank\" rel=\"noopener\">\u00c9douard-Alfred Martel<\/a> ou <a href=\"https:\/\/saf-astronomie.fr\/alexandre-ananoff-lastronaute-meconnu\/\" target=\"_blank\" rel=\"noopener\">Alexandre Ananoff<\/a>.<\/em><br \/>\n<em>C\u2019est par le dessin et surtout la photographie qu\u2019il enregistrait et documentait ses recherches. <\/em>&#8221;<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/livre_rudeaux.jpg\" rel=\"lightbox[20304]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20306\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/livre_rudeaux-450x386.jpg\" alt=\"\" width=\"450\" height=\"386\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/livre_rudeaux-450x386.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/livre_rudeaux-768x659.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/livre_rudeaux.jpg 800w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>En 2021, les Archives d\u00e9partementales de la Manche ont publi\u00e9 un bel ouvrage consacr\u00e9 \u00e0 sa vie et son \u0153uvre. Ce livre est illustr\u00e9 de 300 photographies, dessins et aquarelles de ce scientifique amateur.<!--more--><\/p>\n<h5>La Lune en couleurs :<\/h5>\n<p>Arr\u00eatons-nous un instant page 40, o\u00f9 a \u00e9t\u00e9 reproduite une image de la Pleine Lune, l\u00e9gend\u00e9e &#8220;<em>coloris\u00e9e sur une plaque de verre<\/em>&#8220;. Voil\u00e0 de quoi titiller ma curiosit\u00e9 : pourquoi l&#8217;astronome de Donville avait-il d\u00e9cid\u00e9 d&#8217;ajouter des couleurs ? Et comment les avait-il choisies ? La r\u00e9ponse se trouve dans un exemplaire de l&#8217;<a href=\"https:\/\/www.lillustration.com\/\" target=\"_blank\" rel=\"noopener\">Illustration<\/a> du 19 mai 1928. Rudaux, qui \u00e9tait un collaborateur r\u00e9gulier de la revue, y d\u00e9crit ses recherches sur les couleurs de la Lune :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania.jpg\" rel=\"lightbox[20304]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20307\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania-450x287.jpg\" alt=\"\" width=\"450\" height=\"287\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania-450x287.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania-1024x653.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania-768x489.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_correction_cielmania.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>L&#8217;astronome explique dans un article de six pages, que la (tr\u00e8s belle) carte qu&#8217;il pr\u00e9sente est le r\u00e9sultat de multiples observations men\u00e9es avec une lunette de 95 millim\u00e8tres de diam\u00e8tre au moment de la Pleine Lune entre 1896 et 1927 ! Il ajoute qu&#8217;il a entrepris ce long travail convaincu &#8220;<em>qu&#8217;il comportait un int\u00e9r\u00eat plus grand que celui de la simple curiosit\u00e9&#8221;<\/em>. Et d&#8217;ajouter qu&#8217;il a accentu\u00e9 les couleurs per\u00e7ues \u00e0 l&#8217;oculaire pour rendre sa carte plus explicite, sans pour autant se prononcer sur la signification de ces diff\u00e9rentes teintes.<\/p>\n<h5>Un dessin remarquable :<\/h5>\n<p>Aujourd&#8217;hui, nous disposons de cartes lunaires coloris\u00e9es, depuis les missions <a href=\"https:\/\/science.nasa.gov\/mission\/clementine\/\" target=\"_blank\" rel=\"noopener\">Clementine <\/a>et <a href=\"https:\/\/www.lroc.asu.edu\/\" target=\"_blank\" rel=\"noopener\">LROC<\/a>. Elles ont confirm\u00e9 la relation qui existe entre coloration du sol lunaire et type de roches. Le rouge r\u00e9v\u00e8le par exemple la pr\u00e9sence d\u2019oxyde de fer, le bleu de l\u2019oxyde de titane, le vert de l\u2019olivine (silicate). Mais le travail de Lucien Rudaux est-il\u00a0 cr\u00e9dible ? L&#8217;astronome amateur a-t-il \u00e9t\u00e9 capable de distinguer les subtilit\u00e9s de la surface lunaire avant tout le monde ? Pour le savoir, il fallait comparer sa carte avec ce qui se fait aujourd&#8217;hui :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania.jpg\" rel=\"lightbox[20304]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20308\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania-450x239.jpg\" alt=\"\" width=\"450\" height=\"239\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania-450x239.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania-1024x543.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania-768x408.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/lune_comparatif_cielmania.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>\u00c0 gauche nous voyons l&#8217;\u0153uvre de l&#8217;astronome de Donville, \u00e0 droite une photographie accentu\u00e9e choisie en 2021 comme <a href=\"https:\/\/apod.nasa.gov\/apod\/ap210831.html\" target=\"_blank\" rel=\"noopener\">APOD<\/a>. Presqu&#8217;un si\u00e8cle les s\u00e9pare, mais on ne peut qu&#8217;\u00eatre admiratif sur les similitudes entre ces deux documents. On appr\u00e9ciait depuis longtemps les qualit\u00e9s artistiques ind\u00e9niables des illustrations de Rudaux. Il faudra d\u00e9sormais les consid\u00e9rer aussi comme de v\u00e9ritables documents scientifiques.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/zoom1.jpg\" rel=\"lightbox[20304]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-20311\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/zoom1-450x242.jpg\" alt=\"\" width=\"450\" height=\"242\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/zoom1-450x242.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/zoom1-768x414.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/zoom1.jpg 780w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<h5>Et la carte de Cassini ?<\/h5>\n<p>Lucien Rudaux fut-il vraiment le premier \u00e0 noter les diff\u00e9rentes colorations de la surface lunaire ? En me plongeant dans l&#8217;historique des cartes de notre satellite, je suis tomb\u00e9 sur un d\u00e9tail intriguant. Sur sa carte publi\u00e9e en 1679, <a href=\"https:\/\/francearchives.gouv.fr\/pages_histoire\/39425\" target=\"_blank\" rel=\"noopener\">Jean-Dominique Cassini<\/a> a fait figurer une sorte de c\u0153ur dans la Mer de la S\u00e9r\u00e9nit\u00e9. On a toujours pens\u00e9 qu&#8217;il avait voulu rendre hommage \u00e0 Genevi\u00e8ve de Laistre, sa jeune \u00e9pouse. Il lui aurait \u00e9galement t\u00e9moign\u00e9 son amour en pla\u00e7ant <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/04\/23\/promontorium-heraclides-une-tete-de-femme-sur-la-lune\/\" target=\"_blank\" rel=\"noopener\">une t\u00eate de femme \u00e0 l&#8217;extr\u00e9mit\u00e9 du Golfe des Iris<\/a> :<\/p>\n<figure id=\"attachment_20372\" aria-describedby=\"caption-attachment-20372\" style=\"width: 430px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/carte_cassini.jpg\" rel=\"lightbox[20304]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-20372\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/carte_cassini-430x450.jpg\" alt=\"\" width=\"430\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/carte_cassini-430x450.jpg 430w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/carte_cassini-768x804.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/10\/carte_cassini.jpg 897w\" sizes=\"auto, (max-width: 430px) 100vw, 430px\" \/><\/a><figcaption id=\"caption-attachment-20372\" class=\"wp-caption-text\">Cassini, Jean-Dominique (1625-1712), \u201cCarte de la Lune,\u201d L&#8217;Armarium (Biblioth\u00e8que Num\u00e9rique des Hauts-de-France,<a href=\"https:\/\/www.armarium-hautsdefrance.fr\/document\/20788?origin=Jean-Dominique+Cassini+%281625-1712%29&amp;origin-title=Portraits#?c=0&amp;m=0&amp;s=0&amp;cv=0&amp;xywh=-13005%2C70%2C40002%2C16218\" target=\"_blank\" rel=\"noopener\"> document 20788<\/a>)<\/figcaption><\/figure>\n<p>Sur les cartes en couleurs, on voit une zone \u00e0 peu pr\u00e8s circulaire de teinte diff\u00e9rente \u00e0 l&#8217;int\u00e9rieur de la Mer. Elle pourrait s&#8217;expliquer par un \u00e9panchement de lave tardif. Le premier des Cassini a peut-\u00eatre repr\u00e9sent\u00e9 la limite de cette zone, comme il la percevait dans sa curieuse <a href=\"https:\/\/bibnum.obspm.fr\/exhibits\/show\/selenographies_2019\/observer\/selenographies_obs_lunettes\" target=\"_blank\" rel=\"noopener\">lunette sans tuyau<\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/04\/17\/en-couleurs-la-lune-nous-raconte-son-histoire-geologique\/\" target=\"_blank\" rel=\"noopener\">En couleurs, la Lune r\u00e9v\u00e8le son histoire g\u00e9ologique<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/11\/en-video-la-lune-insolite-de-darya-kawa-mirza\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : la Lune insolite de Darya Kawa Mirza<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/10\/17\/w-h-pickering-lastronome-qui-aimait-trop-la-lune\/\" target=\"_blank\" rel=\"noopener\">W. H. Pickering, l\u2019astronome qui aimait (trop) la Lune<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>\u00a0et sur\u00a0<a href=\"https:\/\/bsky.app\/profile\/cielmania.bsky.social\" target=\"_blank\" rel=\"noopener\">Bluesky<\/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>Parmi les nombreuses recherches qu&#8217;il mena, Lucien Rudaux consacra plusieurs d\u00e9cennies \u00e0 \u00e9tudier les couleurs de la Lune. Les multiples facettes d&#8217;un passionn\u00e9 :\u00a0 Lucien Rudaux, l&#8217;astronome de Donville, aurait eu 150 ans cette ann\u00e9e. Voici le portrait qu&#8217;en dresse la Soci\u00e9t\u00e9 Astronomique de France : &#8221; Lucien Rudaux (1874-1947), \u00ab l\u2019astronome de Donville \u00bb, &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/12\/17\/la-lune-en-couleurs-letonnant-dessin-de-lucien-rudaux\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La Lune en couleurs, l&#8217;\u00e9tonnant dessin de Lucien Rudaux<\/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":20320,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[3653,621,3652,82,1960,3328],"class_list":["post-20304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-donville","tag-jean-dominique-cassini","tag-lucien-rudaux","tag-lune","tag-manche","tag-saf"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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