{"id":6260,"date":"2016-08-27T14:59:50","date_gmt":"2016-08-27T14:59:50","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6260"},"modified":"2016-08-28T05:34:18","modified_gmt":"2016-08-28T05:34:18","slug":"27-aout-venus-jupiter-ont-rendez-crepuscule","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/08\/27\/27-aout-venus-jupiter-ont-rendez-crepuscule\/","title":{"rendered":"27 ao\u00fbt : V\u00e9nus et Jupiter ont rendez-vous au cr\u00e9puscule"},"content":{"rendered":"

Ce soir le ciel nous offre un nouveau rendez-vous plan\u00e9taire \u00e0 rep\u00e9rer dans les lueurs du Soleil couchant, un baiser entre V\u00e9nus et Jupiter.<\/strong><\/p>\n

Souvenez-vous : il y a un peu plus d’un an, le 30 juin 2015 exactement, les plan\u00e8tes V\u00e9nus et Jupiter passaient \u00e0 22 minutes d\u2019arc l\u2019une de l\u2019autre au cr\u00e9puscule, une distance inf\u00e9rieure au diam\u00e8tre apparent de la Pleine Lune<\/a>. Un spectacle que les astrophotographes avaient immortalis\u00e9 aux quatre coins du monde (voir les plus belles images du rapprochement Jupiter-V\u00e9nus<\/a>) pendant que je faisais de m\u00eame depuis la cour du domaine de la Roman\u00e9e-Conti<\/a> \u00e0 Vosne-Roman\u00e9e (entre Dijon et Nuits-Saint-Georges), au pied d\u2019une statue.<\/p>\n

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

Ce soir les deux plan\u00e8tes les plus brillantes du Syst\u00e8me solaire se donnent \u00e0 nouveau rendez-vous au cr\u00e9puscule (simulation sur l’image ci-dessus) mais cette fois-ci beaucoup plus bas sur l’horizon ce qui compliquera un peu leur rep\u00e9rage.<\/p>\n

Commencez \u00e0 rechercher V\u00e9nus<\/a>, la plus lumineuse des deux (magnitude -3,7) au-dessus de l’horizon OUEST environ 30 minutes apr\u00e8s que le Soleil <\/a>se soit couch\u00e9. Jupiter <\/a>\u00e9tant huit fois moins brillante, une paire de jumelles vous permettra de retrouver cette plan\u00e8te coll\u00e9e \u00e0 V\u00e9nus (les deux astres seront espac\u00e9s d’environ 0.1 degr\u00e9 apparent, un \u00e9cart presque trois fois plus faible qu’en juin 2015).<\/p>\n

Si votre ciel est pur et votre horizon bien d\u00e9gag\u00e9, vous pourrez suivre ais\u00e9ment la lente descente des deux plan\u00e8tes vers l’OUEST. Le ciel s’assombrissant, Jupiter deviendra alors visible \u00e0 l’\u0153il nu \u00e0 c\u00f4t\u00e9 de V\u00e9nus. Rappelons qu’il s’agit d’un rapprochement apparent, Jupiter \u00e9tant presque quatre fois plus \u00e9loign\u00e9e de nous que ne l’est V\u00e9nus (955 millions de km contre 230 millions).<\/p>\n

Dans les semaines qui viennent V\u00e9nus va lentement s’\u00e9loigner de l’horizon et devenir de plus en plus spectaculaire dans le ciel du soir. Quant \u00e0 Jupiter elle devient inobservable (elle est en conjonction avec le Soleil le 26 septembre) avant de prendre place dans le ciel du matin \u00e0 partir du mois d’octobre.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ce soir le ciel nous offre un nouveau rendez-vous plan\u00e9taire \u00e0 rep\u00e9rer dans les lueurs du Soleil couchant, un baiser entre V\u00e9nus et Jupiter. Souvenez-vous : il y a un peu plus d’un an, le 30 juin 2015 exactement, les plan\u00e8tes V\u00e9nus et Jupiter passaient \u00e0 22 minutes d\u2019arc l\u2019une de l\u2019autre au cr\u00e9puscule, une … Continuer la lecture de 27 ao\u00fbt : V\u00e9nus et Jupiter ont rendez-vous au cr\u00e9puscule<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":6261,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[90,114,97,160,159],"class_list":["post-6260","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-jupiter","tag-planete","tag-soleil","tag-systeme-solaire","tag-venus"],"yoast_head":"\n27 ao\u00fbt : V\u00e9nus et Jupiter ont rendez-vous au cr\u00e9puscule<\/title>\n<meta name=\"description\" content=\"Ce soir le ciel nous offre un nouveau rendez-vous plan\u00e9taire \u00e0 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