{"id":4344,"date":"2015-12-12T07:31:18","date_gmt":"2015-12-12T07:31:18","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4344"},"modified":"2015-12-19T07:48:29","modified_gmt":"2015-12-19T07:48:29","slug":"venus-mars-et-jupiter-setirent-le-long-de-lecliptique","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/12\/venus-mars-et-jupiter-setirent-le-long-de-lecliptique\/","title":{"rendered":"V\u00e9nus, Mars et Jupiter s’\u00e9tirent le long de l’\u00e9cliptique"},"content":{"rendered":"

V\u00e9nus, Mars et Jupiter se s\u00e9parent lentement \u00e0 l’aube le long de l’\u00e9cliptique, une bande de ciel dans laquelle circulent les plan\u00e8tes et le Soleil.\u00a0<\/strong><\/p>\n

Depuis quelques semaines je vous invite \u00e0 suivre r\u00e9guli\u00e8rement le trio plan\u00e9taire qui anime le ciel en fin de nuit au-dessus de l’horizon EST. Le 3 octobre nous avons pu observer l’alignement Jupiter-Mars-R\u00e9gulus-V\u00e9nus<\/a>, alignement au milieu duquel s’est gliss\u00e9e la vieille Lune le 9 octobre<\/a>.<\/p>\n

Ensuite Jupiter (qui ne cesse de s’\u00e9lever) a doubl\u00e9 Mars (voir ici<\/a>) alors que V\u00e9nus, anim\u00e9e d’un mouvement contraire, est d\u00e9sormais la plan\u00e8te la plus proche de l’horizon EST (on pouvait d\u00e9j\u00e0 le constater lors du rapprochement V\u00e9nus-Mars-Lune<\/a> d\u00e9but novembre).<\/p>\n

\"trio4\"<\/a><\/p>\n

Essayons de comprendre pourquoi ces astres circulent dans la m\u00eame bande de ciel, appel\u00e9e plan de l’\u00e9cliptique, une situation \u00e0 l’origine des rencontres c\u00e9lestes que nous aimons tant et qui sont les\u00a0conjonctions<\/a>\u00a0et les\u00a0\u00e9clipses<\/a>.<\/p>\n

Si l’on se place d’un point de vue \u00a0h\u00e9liocentrique, l’\u00e9cliptique mat\u00e9rialise le\u00a0plan de l\u2019orbite terrestre et de l’ensemble des orbites plan\u00e9taires autour de notre \u00e9toile. Mais il est plus facile d’envisager la situation depuis notre observatoire naturel, la Terre ; en regardant la sph\u00e8re c\u00e9leste, l’\u00e9cliptique symbolise pour nous un grand cercle repr\u00e9sentant la projection de la trajectoire annuelle apparente du Soleil <\/a>(ainsi que celles des plan\u00e8tes <\/a>qui\u00a0s’\u00e9cartent plus ou moins de l’\u00e9cliptique dans une \u00e9troite bande appel\u00e9e le zodiaque astronomique). La Lune <\/a>coupe le plan de l’\u00e9cliptique environ tous les 27 jours.<\/p>\n

L’image ci-dessus nous permet d’appr\u00e9cier l’alignement de V\u00e9nus, Mars et Jupiter le long de l’\u00e9cliptique. Les trois plan\u00e8tes surplombent l’\u00e9glise Saint-Symphorien<\/a> \u00e0 Nuits-Saint-Georges.<\/p>\n","protected":false},"excerpt":{"rendered":"

V\u00e9nus, Mars et Jupiter se s\u00e9parent lentement \u00e0 l’aube le long de l’\u00e9cliptique, une bande de ciel dans laquelle circulent les plan\u00e8tes et le Soleil.\u00a0 Depuis quelques semaines je vous invite \u00e0 suivre r\u00e9guli\u00e8rement le trio plan\u00e9taire qui anime le ciel en fin de nuit au-dessus de l’horizon EST. Le 3 octobre nous avons pu … Continuer la lecture de V\u00e9nus, Mars et Jupiter s’\u00e9tirent le long de l’\u00e9cliptique<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":4345,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[326,214,90,116,146,114,159,293],"class_list":["post-4344","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-ecliptique","tag-eglise-saint-symphorien","tag-jupiter","tag-mars","tag-nuits-saint-georges","tag-planete","tag-venus","tag-zodiaque"],"yoast_head":"\nV\u00e9nus, Mars et Jupiter s'\u00e9tirent le long de l'\u00e9cliptique<\/title>\n<meta name=\"description\" content=\"V\u00e9nus, Mars et Jupiter se s\u00e9parent lentement \u00e0 l'aube le long de l'\u00e9cliptique, une bande de ciel dans laquelle circulent les plan\u00e8tes et le 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