{"id":6962,"date":"2017-01-08T08:42:24","date_gmt":"2017-01-08T08:42:24","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6962"},"modified":"2017-01-17T12:16:53","modified_gmt":"2017-01-17T12:16:53","slug":"un-morceau-ciel-vieux-3-600-ans-sur-le-disque-de-nebra","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/08\/un-morceau-ciel-vieux-3-600-ans-sur-le-disque-de-nebra\/","title":{"rendered":"Un morceau de ciel vieux de 3.600 ans sur le disque de Nebra"},"content":{"rendered":"

Le disque de Nebra, une d\u00e9couverte arch\u00e9oastronomique majeure, nous montre un morceau de la vo\u00fbte c\u00e9leste repr\u00e9sent\u00e9 il y a 3.600 ans. \u00a0<\/strong><\/p>\n

C’est un disque de bronze d’environ 30 cm de diam\u00e8tre qui p\u00e8se pr\u00e8s de 2 kg. D\u00e9couvert en 1999 \u00e0 proximit\u00e9 de la ville allemande de Nebra par des pilleurs de tr\u00e9sors, il a \u00e9t\u00e9 saisi lorsque ces derniers ont cherch\u00e9 \u00e0 le vendre et se trouve depuis 2002 au Mus\u00e9e r\u00e9gional de la Pr\u00e9histoire de Halle<\/a>.<\/p>\n

\"nebra1\"<\/a><\/p>\n

D’apr\u00e8s l’analyse microscopique de la patine du disque et l’ \u00e9tude isotopique du plomb radioactif qu’il contient on peut dater approximativement sa r\u00e9alisation vers l’an 1.600 av. J.-C. ce qui en ferait l’une des plus vieilles\u00a0repr\u00e9sentations de la vo\u00fbte c\u00e9leste.<\/p>\n

Si l’on pose ce disque horizontalement, deux bandes d’or (celle de gauche sur la photographie n’existe plus) repr\u00e9sentent chacune un arc de 82,5\u00b0 qui correspond aux directions possibles des levers et couchers du Soleil entre les solstices d’\u00e9t\u00e9<\/a> et d’hiver \u00e0 cette \u00e9poque pour la r\u00e9gion.<\/p>\n

\"nebra2\"<\/a><\/p>\n

Des points en or repr\u00e9sentent peut-\u00eatre des \u00e9toiles ; 7 de ces points regroup\u00e9s \u00e9voquent les \u00e9toiles des Pl\u00e9iades<\/a>, un amas ouvert situ\u00e9 dans la constellation du Taureau<\/a> parfaitement visible \u00e0 l’\u0153il nu et connu depuis le N\u00e9olithique.<\/p>\n

On note aussi la pr\u00e9sence d’un disque et d’un croissant en or : faut-il y voir le Soleil<\/a> avec un croissant de Lune<\/a> (mais ce dernier est mal plac\u00e9 par rapport \u00e0 la lumi\u00e8re solaire), la seule Lune (pleine et en croissant) ou encore une \u00e9clipse partielle de Soleil<\/a> ?<\/p>\n

Autre repr\u00e9sentation qui divise les arch\u00e9oastronomes : un arc de cercle stri\u00e9 qui pourrait \u00e9voquer la barque solaire (un objet symbolique de la mythologie \u00e9gyptienne destin\u00e9 \u00e0 transporter le Soleil la nuit dans un p\u00e9riple souterrain pour qu’il renaisse le matin \u00e0 l’EST) ou plus simplement la Voie lact\u00e9e<\/a>.<\/p>\n

Nous ne saurons peut-\u00eatre jamais la signification de tous les symboles qui ornent le disque de Nebra mais on peut consid\u00e9rer cet objet comme une sorte de petite encyclop\u00e9die astronomique o\u00f9 sont regroup\u00e9es diff\u00e9rentes informations c\u00e9lestes connues \u00e0 cette p\u00e9riode dans cette r\u00e9gion d’Europe. Cela signifierait que les astronomes<\/a>\u00a0avaient alors des connaissances beaucoup plus importantes que ce que l’on pensait jusqu’\u00e0 maintenant.<\/p>\n","protected":false},"excerpt":{"rendered":"

Le disque de Nebra, une d\u00e9couverte arch\u00e9oastronomique majeure, nous montre un morceau de la vo\u00fbte c\u00e9leste repr\u00e9sent\u00e9 il y a 3.600 ans. \u00a0 C’est un disque de bronze d’environ 30 cm de diam\u00e8tre qui p\u00e8se pr\u00e8s de 2 kg. D\u00e9couvert en 1999 \u00e0 proximit\u00e9 de la ville allemande de Nebra par des pilleurs de tr\u00e9sors, … Continuer la lecture de Un morceau de ciel vieux de 3.600 ans sur le disque de Nebra<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":6963,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[151,713,1974,132,1972,89,1973,82,97,216,166],"class_list":["post-6962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-allemagne","tag-amas-des-pleiades","tag-barque-solaire","tag-constellation-du-taureau","tag-disque-de-nebra","tag-etoile","tag-halle","tag-lune","tag-soleil","tag-solstice","tag-voie-lactee"],"yoast_head":"\nUn morceau de ciel vieux de 3.600 ans sur le disque de Nebra<\/title>\n<meta name=\"description\" content=\"Le disque de Nebra, une 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