{"id":15503,"date":"2022-02-09T13:51:35","date_gmt":"2022-02-09T13:51:35","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=15503"},"modified":"2022-02-25T18:02:53","modified_gmt":"2022-02-25T18:02:53","slug":"la-planete-mars-est-de-retour-aux-cotes-de-venus-a-laube","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/02\/09\/la-planete-mars-est-de-retour-aux-cotes-de-venus-a-laube\/","title":{"rendered":"La plan\u00e8te Mars est de retour aux c\u00f4t\u00e9s de V\u00e9nus \u00e0 l&#8217;aube"},"content":{"rendered":"<p><strong>En 2022, nous suivrons le retour de Mars, au plus pr\u00e8s le 8 d\u00e9cembre. La Plan\u00e8te rouge est actuellement observable du c\u00f4t\u00e9 de V\u00e9nus.<\/strong><\/p>\n<h5>Une plan\u00e8te intrigante :<\/h5>\n<p>Mars est sans conteste la plan\u00e8te qui nous fascine le plus. Sa couleur ocre (en raison de la pr\u00e9sence d\u2019oxyde de fer \u00e0 sa surface) et ses variations de luminosit\u00e9 (sa distance peut varier de 50 \u00e0 400 millions de kilom\u00e8tres) avaient \u00e9t\u00e9 remarqu\u00e9es depuis l\u2019Antiquit\u00e9. Les premi\u00e8res observations t\u00e9lescopiques d\u00e9but\u00e8rent avec\u00a0<a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/06\/galilee-le-savant-qui-a-ouvert-nos-yeux-sur-lunivers\/\" target=\"_blank\" rel=\"noopener\">Galil\u00e9e<\/a>. L\u2019am\u00e9lioration des instruments apporta de nouveaux indices troublants. La Plan\u00e8te rouge tournait sur elle-m\u00eame \u00e0 la m\u00eame vitesse que la Terre, et on y observait des calottes polaires dont l&#8217;aspect change au fil des saisons.<\/p>\n<figure id=\"attachment_12842\" aria-describedby=\"caption-attachment-12842\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars.jpg\" rel=\"lightbox[15503]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-12842\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2020\/11\/mars.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-12842\" class=\"wp-caption-text\">Mars photographi\u00e9e le 30 octobre 2020 \u00e0 l&#8217;aide d&#8217;un t\u00e9lescope de 1 m\u00e8tre de diam\u00e8tre. Le canyon g\u00e9ant de Valles Marineris appara\u00eet comme une cicatrice sombre. \u00a9 Damian Peach<\/figcaption><\/figure>\n<p>Avec\u00a0<a href=\"https:\/\/mars.nasa.gov\/mars2020\/\" target=\"_blank\" rel=\"noopener\">Perseverance<\/a>, mais \u00e9galement toutes les autres missions en cours, l\u2019exploration de Mars se poursuit. Les scientifiques esp\u00e8rent y trouver des traces de vie pass\u00e9e. Et les agences spatiales r\u00eavent d\u2019y poser le pied dans quelques d\u00e9cennies.<!--more--><\/p>\n<h5>Du c\u00f4t\u00e9 de V\u00e9nus :<\/h5>\n<p>La prochaine opposition martienne est pr\u00e9vue le 8 d\u00e9cembre prochain. \u00c0 cette date, la quatri\u00e8me plan\u00e8te du Syst\u00e8me solaire aura un diam\u00e8tre apparent l\u00e9g\u00e8rement sup\u00e9rieur \u00e0 17 secondes d&#8217;arc. Elle brillera dans le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/10\/29\/la-constellation-du-taureau-dessinee-dans-la-grotte-de-lascaux\/\" target=\"_blank\" rel=\"noopener\">Taureau<\/a> avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener\">magnitude<\/a> de -1,8 et de nombreux astronomes l&#8217;admireront dans leurs t\u00e9lescopes. Mais pour le moment, Mars est encore bien loin. Son diam\u00e8tre n&#8217;est que de 4,5 secondes d&#8217;arc et sa magnitude de 1,7. Elle est environ 250 fois moins brillante que V\u00e9nus :<\/p>\n<figure id=\"attachment_15504\" aria-describedby=\"caption-attachment-15504\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars.jpg\" rel=\"lightbox[15503]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15504\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/02\/venus_mars.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15504\" class=\"wp-caption-text\">L&#8217;\u00e9clatante V\u00e9nus et la discr\u00e8te Mars \u00e0 l&#8217;aube du 9 f\u00e9vrier 2022. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>La plus petite s\u00e9paration entre les deux astres (4,5\u00b0 apparents) sera observable \u00e0 l&#8217;aube du 6 mars. Puis la Plan\u00e8te rouge continuera de cheminer du Sagittaire au Taureau tout au long de l&#8217;ann\u00e9e. Elle augmentera d&#8217;\u00e9clat et de diam\u00e8tre, tout en allongeant sa dur\u00e9e de visibilit\u00e9 nocturne. Le 8 d\u00e9cembre en fin de nuit, elle sera m\u00eame occult\u00e9e par la Lune. Assur\u00e9ment l&#8217;un des plus beaux spectacles astronomiques de cette ann\u00e9e 2022 !<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/01\/04\/planete-mars-decouvrez-les-etonnants-crateres-inverses\/\" target=\"_blank\" rel=\"noopener\">D&#8217;o\u00f9 viennent les curieux crat\u00e8res invers\u00e9s sur Mars ?<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/10\/14\/planete-mars-spectaculaire-image-de-la-calotte-polaire-sud\/\" target=\"_blank\" rel=\"noopener\">Plan\u00e8te Mars : spectaculaire image de la calotte polaire sud<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/10\/09\/en-images-la-beaute-des-dunes-sur-la-planete-mars\/\" target=\"_blank\" rel=\"noopener\">En images : la beaut\u00e9 des dunes sur la plan\u00e8te Mars<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener noreferrer\">Facebook<\/a>\u00a0ou\u00a0<a href=\"https:\/\/twitter.com\/cielmania\" target=\"_blank\" rel=\"noopener noreferrer\">Twitter<\/a>.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>En 2022, nous suivrons le retour de Mars, au plus pr\u00e8s le 8 d\u00e9cembre. La Plan\u00e8te rouge est actuellement observable du c\u00f4t\u00e9 de V\u00e9nus. Une plan\u00e8te intrigante : Mars est sans conteste la plan\u00e8te qui nous fascine le plus. Sa couleur ocre (en raison de la pr\u00e9sence d\u2019oxyde de fer \u00e0 sa surface) et ses &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/02\/09\/la-planete-mars-est-de-retour-aux-cotes-de-venus-a-laube\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La plan\u00e8te Mars est de retour aux c\u00f4t\u00e9s de V\u00e9nus \u00e0 l&#8217;aube<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":8,"featured_media":15504,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[116,115,159],"class_list":["post-15503","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-mars","tag-planete-rouge","tag-venus"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La plan\u00e8te Mars est de retour aux c\u00f4t\u00e9s de V\u00e9nus \u00e0 l&#039;aube<\/title>\n<meta name=\"description\" content=\"En 2022, nous suivrons le retour de Mars, au plus pr\u00e8s le 8 d\u00e9cembre. 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