{"id":11134,"date":"2019-08-31T11:48:33","date_gmt":"2019-08-31T11:48:33","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=11134"},"modified":"2019-09-08T06:22:15","modified_gmt":"2019-09-08T06:22:15","slug":"spectacle-celeste-jupiter-a-proximite-de-letoile-supergeante-antares","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/08\/31\/spectacle-celeste-jupiter-a-proximite-de-letoile-supergeante-antares\/","title":{"rendered":"Spectacle c\u00e9leste : Jupiter \u00e0 proximit\u00e9 de l’\u00e9toile superg\u00e9ante Antar\u00e8s"},"content":{"rendered":"

Apr\u00e8s son opposition du mois de juin, Jupiter continue de briller aux c\u00f4t\u00e9s d’Antar\u00e8s en d\u00e9but de nuit. Prenez le temps d’admirer ce duo c\u00e9leste.<\/strong><\/p>\n

Le\u00a0 10 juin 2019 Jupiter passait \u00e0 l\u2019opposition (alignement Soleil-Terre-Jupiter) \u00e0 645 millions de km de nous, soit un diam\u00e8tre apparent de 46 sec d\u2019arc et une magnitude<\/a> de -2,6. Depuis cette date la plan\u00e8te g\u00e9ante gazeuse s’\u00e9loigne de nous mais son \u00e9clat est toujours aussi vif. Lorsque la nuit tombe, dirigez votre regard vers le sud-ouest. Jupiter est l’astre le plus brillant : il appara\u00eet dans un ciel encore clair avant toutes les \u00e9toiles. Sa voisine Antar\u00e8s est une \u00e9toile superg\u00e9ante rouge de magnitude 1 qui brille dans la constellation du Scorpion<\/a>. Le VLTI a permis d’obtenir une superbe image<\/a> de cet astre.<\/p>\n

\"\"<\/a>
Jupiter et Antar\u00e8s sont observables sur l’horizon sud-ouest. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n

Si l’\u0153il nu est suffisant pour rep\u00e9rer les deux astres, ne laissez pas dormir votre paire de jumelles<\/a>. Bien cal\u00e9e entre vos mains (coudes pos\u00e9s sur une table), elle vous permettra d\u2019admirer le ballet des 4 principales lunes qui sont Io<\/a>,\u00a0Europe<\/a>, Ganym\u00e8de et\u00a0Callisto<\/a>, les satellites galil\u00e9ens (ils ont \u00e9t\u00e9 d\u00e9couverts en 1610 par Galil\u00e9e<\/a>). Avec un peu d’attention et une atmosph\u00e8re stable, on devine parfois les deux principales bandes sombres qui ceinturent l’astre. Mais pour esp\u00e9rer voir plus de d\u00e9tails sur la plan\u00e8te il faut disposer d\u2019une lunette astronomique<\/a>\u00a0ou d\u2019un\u00a0t\u00e9lescope\u00a0<\/a>bien r\u00e9gl\u00e9s.<\/p>\n","protected":false},"excerpt":{"rendered":"

Apr\u00e8s son opposition du mois de juin, Jupiter continue de briller aux c\u00f4t\u00e9s d’Antar\u00e8s en d\u00e9but de nuit. Prenez le temps d’admirer ce duo c\u00e9leste. Le\u00a0 10 juin 2019 Jupiter passait \u00e0 l\u2019opposition (alignement Soleil-Terre-Jupiter) \u00e0 645 millions de km de nous, soit un diam\u00e8tre apparent de 46 sec d\u2019arc et une magnitude de -2,6. … Continuer la lecture de Spectacle c\u00e9leste : Jupiter \u00e0 proximit\u00e9 de l’\u00e9toile superg\u00e9ante Antar\u00e8s<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":11135,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[374,376,90],"class_list":["post-11134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-antares","tag-constellation-du-scorpion","tag-jupiter"],"yoast_head":"\nSpectacle c\u00e9leste : Jupiter \u00e0 proximit\u00e9 de l'\u00e9toile superg\u00e9ante Antar\u00e8s<\/title>\n<meta name=\"description\" content=\"Apr\u00e8s son opposition du mois de juin, Jupiter continue de briller aux c\u00f4t\u00e9s d'Antar\u00e8s en d\u00e9but de nuit. 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