{"id":9819,"date":"2016-05-13T18:29:08","date_gmt":"2016-05-13T18:29:08","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/comparaison-entre-venus-et-mercure\/"},"modified":"2025-06-08T22:45:57","modified_gmt":"2025-06-08T20:45:57","slug":"comparaison-entre-venus-et-mercure","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/comparaison-entre-venus-et-mercure\/","title":{"rendered":"Comparaison entre V\u00e9nus et Mercure"},"content":{"rendered":"

Bonjour,
\nvoici un montage qui montre bien la diff\u00e9rence de taille apparente entre les deux plan\u00e8tes lors d’un transit:<\/p>\n

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

Lors du transit du 6 juin 2012, V\u00e9nus dont le diam\u00e8tre r\u00e9el est de 12.104 km, se trouvait \u00e0 quelque 0,73 UA* du Soleil soit 0.28 UA de la Terre (qui se trouvait \u00e0 1,01 UA du Soleil) ce qui fait environ 38,9 millions de km ; son diam\u00e8tre apparent devant le Soleil \u00e9tait de 58 secondes d\u2019arc.
\nLors du transit du 9 mai 2016, Mercure dont le diam\u00e8tre r\u00e9el n\u2019est que de 4.879 km, se trouvait \u00e0 environ 0.45 UA du Soleil soit 0,55 UA de la Terre (qui se trouvait \u00e0 1 UA du Soleil) ce qui fait environ 67,32 millions de km et son diam\u00e8tre apparent n\u2019\u00e9tait que de 11,7 secondes d\u2019arc.<\/p>\n

Rappelons que le Soleil fait 1.391.400 km de diam\u00e8tre! soit environ 30 minutes d’arc de diam\u00e8tre apparent et qu’il se trouve par d\u00e9finition \u00e0 1 UA de la Terre.<\/p>\n

*L\u2019UA (Unit\u00e9 Astronomique) est d\u00e9finie par la distance Terre Soleil. Elle vaut environ 149.6 millions de km.<\/p>\n

Photos faites au 350D plac\u00e9 au foyer de la NP101IS<\/p>\n

J-Luc<\/p>\n\n\n

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\n 10\/10 - (2 votes) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Bonjour, voici un montage qui montre bien la diff\u00e9rence de taille apparente entre les deux plan\u00e8tes lors d’un transit: Lors du transit du 6 juin 2012, V\u00e9nus dont le diam\u00e8tre r\u00e9el est de 12.104 km, se trouvait \u00e0 quelque 0,73 UA* du Soleil soit 0.28 UA de la Terre (qui se trouvait \u00e0 1,01 UA […]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-9819","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9819","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=9819"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9819\/revisions"}],"predecessor-version":[{"id":11871,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/9819\/revisions\/11871"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=9819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=9819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=9819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}