{"id":6848,"date":"2016-12-08T13:16:54","date_gmt":"2016-12-08T13:16:54","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6848"},"modified":"2016-12-21T07:00:56","modified_gmt":"2016-12-21T07:00:56","slug":"admirez-planete-venus-ciel-soir","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/12\/08\/admirez-planete-venus-ciel-soir\/","title":{"rendered":"Admirez la plan\u00e8te V\u00e9nus dans le ciel du soir"},"content":{"rendered":"

Pendant les semaines qui viennent vous aurez tout le temps d’admirer l’\u00e9clatante V\u00e9nus qui tr\u00f4ne majestueusement au cr\u00e9puscule. \u00a0<\/strong><\/p>\n

Peut-\u00eatre avez-vous d\u00e9j\u00e0 remarqu\u00e9 qu’un astre tr\u00e8s brillant \u00e9tincelle au-dessus de l’horizon OUEST bien avant la nuit noire. Ce n’est pas un OVNI mais V\u00e9nus, la seconde plan\u00e8te du Syst\u00e8me solaire (juste apr\u00e8s Mercure<\/a>), l\u2019astre nocturne le plus brillant apr\u00e8s la Lune <\/a>en raison de sa relative proximit\u00e9 et surtout de la couche nuageuse qui l\u2019entoure en permanence et qui renvoie la lumi\u00e8re solaire.<\/p>\n

\"venus1\"<\/a><\/p>\n

V\u00e9nus va briller ainsi de mille feux au cr\u00e9puscule jusqu’au d\u00e9but du mois de mars 2017.<\/p>\n

Tout comme Mercure, V\u00e9nus n’est jamais tr\u00e8s loin du Soleil <\/a>et il est impossible de l’observer en pleine nuit. Il faut donc choisir la p\u00e9riode qui encadre l’\u00e9longation maximale, le moment o\u00f9 l’\u00e9cart angulaire avec notre \u00e9toile est le plus important. Ce sera le cas le 12 janvier prochain avec un \u00e9cart de 47\u00b0 entre les deux astres. Actuellement V\u00e9nus suit le Soleil et la plan\u00e8te est donc visible en soir\u00e9e apr\u00e8s le coucher de notre \u00e9toile<\/a>. La situation s’inversera apr\u00e8s la conjonction inf\u00e9rieure du 25 mars ; nous retrouverons ensuite la plan\u00e8te \u00e0 l’aube (vue depuis notre observatoire terrestre on aura l’impression qu’elle a doubl\u00e9 le Soleil).<\/p>\n

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

Toute seule dans le ciel cr\u00e9pusculaire la plan\u00e8te est d\u00e9j\u00e0 remarquable mais le spectacle est encore plus beau quand elle est rejointe par un jeune croissant de Lune accompagn\u00e9 de lumi\u00e8re cendr\u00e9e<\/a> (comme sur ces deux images r\u00e9alis\u00e9es en septembre 2015). Ce sera le cas les 2 et 31 janvier 2017 ainsi que le 28 f\u00e9vrier.<\/p>\n

\"lune_venus2\"<\/a><\/p>\n

Si vous l\u2019observez dans une lunette astronomique<\/a> ou un t\u00e9lescope vous pourrez m\u00eame y voir des phases (gibbeuse en d\u00e9cembre, en Dernier Quartier fin janvier puis en croissant dans les semaines qui suivront comme sur l’image ci-dessous). Mais attention ! Si cette plan\u00e8te \u00e9voque la d\u00e9esse de l\u2019amour dans la mythologie romaine, c\u2019est plut\u00f4t l\u2019enfer \u00e0 sa surface : temp\u00e9ratures infernales et pluies d\u2019acide sulfurique vous feront regretter le voyage\u2026<\/p>\n

\"venus1\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Pendant les semaines qui viennent vous aurez tout le temps d’admirer l’\u00e9clatante V\u00e9nus qui tr\u00f4ne majestueusement au cr\u00e9puscule. \u00a0 Peut-\u00eatre avez-vous d\u00e9j\u00e0 remarqu\u00e9 qu’un astre tr\u00e8s brillant \u00e9tincelle au-dessus de l’horizon OUEST bien avant la nuit noire. Ce n’est pas un OVNI mais V\u00e9nus, la seconde plan\u00e8te du Syst\u00e8me solaire (juste apr\u00e8s Mercure), l\u2019astre nocturne … Continuer la lecture de Admirez la plan\u00e8te V\u00e9nus dans le ciel du soir<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":6849,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[1155,141,483,88,140,114,97,159],"class_list":["post-6848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-conjonction-inferieure","tag-elongation","tag-jeune-croissant","tag-lumiere-cendree","tag-mercure","tag-planete","tag-soleil","tag-venus"],"yoast_head":"\nAdmirez la plan\u00e8te V\u00e9nus dans le ciel du soir<\/title>\n<meta name=\"description\" content=\"Pendant les semaines qui viennent vous aurez tout le temps d'admirer 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