{"id":4931,"date":"2016-02-18T10:10:03","date_gmt":"2016-02-18T10:10:03","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4931"},"modified":"2016-02-29T14:27:47","modified_gmt":"2016-02-29T14:27:47","slug":"jupiter-les-babyloniens-et-la-geometrie","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/18\/jupiter-les-babyloniens-et-la-geometrie\/","title":{"rendered":"Jupiter, les Babyloniens et la g\u00e9om\u00e9trie"},"content":{"rendered":"<p><strong>Une \u00e9tude parue dans la revue Science r\u00e9v\u00e8le que les Babyloniens utilisaient la g\u00e9om\u00e9trie pour calculer la trajectoire de Jupiter bien avant les Europ\u00e9ens.<\/strong><\/p>\n<p>Les Babyloniens vivaient avant la naissance du Christ dans l\u2019ancienne M\u00e9sopotamie, une zone g\u00e9ographique comprise entre les fleuves Tigre et Euphrate qui correspond aujourd&#8217;hui \u00e0 l&#8217;Irak. Obs\u00e9d\u00e9s par l&#8217;id\u00e9e de pr\u00e9dire l&#8217;avenir en observant les \u00e9toiles et les plan\u00e8tes, ils furent \u00e0 l&#8217;origine du zodiaque astrologique, une bande de ciel d\u00e9coup\u00e9e en 12 parties \u00e9gales que le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/08\/15\/dans-la-mer-le-soleil-est-encore-plus-beau\/\" target=\"_blank\">Soleil <\/a>\u00ab\u00a0traverse\u00a0\u00bb en une ann\u00e9e.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter.jpg\"  rel=\"lightbox[4931] attachment wp-att-4935\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4935\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter-450x312.jpg\" alt=\"jupiter\" width=\"450\" height=\"312\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter-450x312.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter-768x532.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter-1024x709.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/jupiter.jpg 1300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>En \u00e9tudiant des tablettes d&#8217;argile de l&#8217;\u00e9poque Babylonienne faisant partie des collections du <em><a href=\"http:\/\/www.britishmuseum.org\/\" target=\"_blank\">British Museum<\/a><\/em>\u00a0\u00e0 Londres depuis le XIXe si\u00e8cle, un professeur de l&#8217;<a href=\"https:\/\/www.hu-berlin.de\/de\" target=\"_blank\">Universit\u00e9 Humboldt<\/a> (Berlin), <a href=\"http:\/\/science.sciencemag.org\/content\/351\/6272\/482\" target=\"_blank\">Mathieu Ossendrijver<\/a>, a d\u00e9couvert que les astrologues Babyloniens utilisaient d\u00e9j\u00e0 des calculs g\u00e9om\u00e9triques pour d\u00e9terminer la position de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/08\/jupiter-sera-plus-pres-de-terre-deux-mois\/\" target=\"_blank\">Jupiter <\/a>entre l&#8217;an 350 et 50 avant J-C, une technique que les savants europ\u00e9ens utilis\u00e8rent quatorze si\u00e8cles plus tard.<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x39n69k\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : de nouvelles images de la Grande Tache Rouge sur Jupiter<\/strong><\/p>\n<p><!--more-->Mais pourquoi cet int\u00e9r\u00eat pour Jupiter et non pas pour <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/11\/04\/veritas-et-davinci-objectif-venus-pour-la-nasa\/\" target=\"_blank\">V\u00e9nus <\/a>(beaucoup plus brillante) ou <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/27\/sur-mars-curiosity-etudie-des-dunes-en-mouvement\/\" target=\"_blank\">Mars<\/a>, dont l&#8217;inqui\u00e9tante couleur ocre ne devait pas manquer d&#8217;attirer l&#8217;attention ?\u00a0Tout simplement parce que Marduk (le plus grand dieu babylonien) \u00e9tait associ\u00e9 \u00e0 la plan\u00e8te gazeuse g\u00e9ante. Le calcul de sa trajectoire \u00e9tait donc une priorit\u00e9 pour les astrologues.<\/p>\n<p>Il faut dire que le d\u00e9placement de Jupiter dans le ciel a de quoi d\u00e9router les observateurs. Comme toutes les plan\u00e8tes, la vitesse de Jupiter varie le long de son orbite\u00a0: compar\u00e9e aux \u00e9toiles elle semble acc\u00e9l\u00e9rer ou ralentir. Mais ce n&#8217;est pas tout\u00a0: environ deux mois avant son opposition qui se produit tous les 498 jours (le moment o\u00f9 la plan\u00e8te est le mieux observable), elle se met \u00e0 faire marche arri\u00e8re par rapport aux \u00e9toiles puis repart dans le bon sens deux mois apr\u00e8s l&#8217;opposition.<\/p>\n<p>Si les suppositions de\u00a0Mathieu Ossendrijver sont exactes, il faudra en conclure que les\u00a0astrologues Babyloniens avaient atteint un niveau en math\u00e9matiques et g\u00e9om\u00e9trie bien plus avanc\u00e9 que ce que l&#8217;on supposait jusqu&#8217;alors. En attendant, vous pouvez toujours admirer la plan\u00e8te Jupiter dans la constellation du Lion, de plus en plus brillante (magnitude -2,4) avant son opposition le 8 mars prochain.<\/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>Une \u00e9tude parue dans la revue Science r\u00e9v\u00e8le que les Babyloniens utilisaient la g\u00e9om\u00e9trie pour calculer la trajectoire de Jupiter bien avant les Europ\u00e9ens. Les Babyloniens vivaient avant la naissance du Christ dans l\u2019ancienne M\u00e9sopotamie, une zone g\u00e9ographique comprise entre les fleuves Tigre et Euphrate qui correspond aujourd&#8217;hui \u00e0 l&#8217;Irak. Obs\u00e9d\u00e9s par l&#8217;id\u00e9e de pr\u00e9dire &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/18\/jupiter-les-babyloniens-et-la-geometrie\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Jupiter, les Babyloniens et la g\u00e9om\u00e9trie<\/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":4935,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[87],"tags":[1486,1487,372,90,1485,114,1488],"class_list":["post-4931","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-les-hommes-et-le-ciel","tag-babylonniens","tag-british-museum","tag-constellation-du-lion","tag-jupiter","tag-mathieu-ossendrijver","tag-planete","tag-universite-humboldt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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