{"id":9106,"date":"2018-04-04T16:26:08","date_gmt":"2018-04-04T16:26:08","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=9106"},"modified":"2018-04-20T09:32:52","modified_gmt":"2018-04-20T09:32:52","slug":"saturne-mars-duo-planetaire-a-laube","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/04\/04\/saturne-mars-duo-planetaire-a-laube\/","title":{"rendered":"Saturne et Mars, un duo plan\u00e9taire \u00e0 l’aube"},"content":{"rendered":"

Leur \u00e9clat est presque comparable et moins de 2\u00b0 apparents les s\u00e9parent : Saturne et Mars sont actuellement visibles dans le Sagittaire \u00e0 l’aube.<\/strong><\/p>\n

Saturne et Mars, c’est un peu le couple plan\u00e9taire mythique : la premi\u00e8re a fait na\u00eetre de nombreuses vocations d’astronomes chez de simples curieux qui d\u00e9couvraient pour la premi\u00e8re fois ses magnifiques anneaux<\/a> dans un t\u00e9lescope<\/a>, la seconde a toujours fascin\u00e9 les hommes (comme Camille Flammarion<\/a>) tant elle ressemble \u00e0 la Terre. En ce moment elles forment un joli duo en fin de nuit dans la constellation du Sagittaire<\/a>, en direction du SUD-EST.<\/p>\n

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

Cette image a \u00e9t\u00e9 r\u00e9alis\u00e9e \u00e0 l’aube du 4 avril avec une focale de 50 mm et une pose de 8 secondes \u00e0 1200 iso.\u00a0<\/p>\n

Mars est la plan\u00e8te \u00e0 suivre en 2018 : le 27 juillet prochain\u00a0elle se trouvera \u00e0 un peu moins de 58 millions de km de la Terre (ce sera l\u2019opposition) et son disque orang\u00e9 (une couleur provoqu\u00e9e par l\u2019oxyde de fer pr\u00e9sent en grande quantit\u00e9 dans le sol martien) aura un diam\u00e8tre de 24 sec d\u2019arc et une\u00a0magnitude<\/a>\u00a0de -2,8. Ce sera alors l\u2019astre le plus brillant du ciel nocturne si on fait abstraction de la\u00a0Lune<\/a>.<\/p>\n

Un mois plus t\u00f4t, le 27 juin, c’est Saturne qui sera pass\u00e9e au plus pr\u00e8s de la Terre \u00e0 un peu plus de 9 Unit\u00e9s Astronomiques. Comme c’est le cas depuis 2009, nous pouvons d\u00e9j\u00e0 admirer la face NORD de ses anneaux \u00e9clair\u00e9e par le Soleil<\/a>, situation qui va se prolonger jusqu’en 2025, date du prochain passage de la Terre dans le plan des anneaux (qui \u00e0 cette occasion seront vus exactement par la tranche).<\/p>\n

Pour suivre le ballet entre Saturne et Mars au cours des prochaines semaines (la Lune d\u00e9croissante sera de la partie les 7 et 8 avril), n’oubliez pas de consulter la carte interactive de Stelvision<\/a>.<\/p>\n

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

Leur \u00e9clat est presque comparable et moins de 2\u00b0 apparents les s\u00e9parent : Saturne et Mars sont actuellement visibles dans le Sagittaire \u00e0 l’aube. Saturne et Mars, c’est un peu le couple plan\u00e9taire mythique : la premi\u00e8re a fait na\u00eetre de nombreuses vocations d’astronomes chez de simples curieux qui d\u00e9couvraient pour la premi\u00e8re fois ses … Continuer la lecture de Saturne et Mars, un duo plan\u00e9taire \u00e0 l’aube<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":9107,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[496,116,190,136],"class_list":["post-9106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-constellation-du-sagittaire","tag-mars","tag-opposition","tag-saturne"],"yoast_head":"\nSaturne et Mars, un duo plan\u00e9taire \u00e0 l'aube<\/title>\n<meta name=\"description\" content=\"Leur \u00e9clat est presque comparable et moins de 2\u00b0 apparents les s\u00e9parent : 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