{"id":20043,"date":"2024-09-01T08:30:16","date_gmt":"2024-09-01T08:30:16","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=20043"},"modified":"2024-09-07T15:53:11","modified_gmt":"2024-09-07T15:53:11","slug":"discrete-mercure-pointe-sous-la-lune-a-laube","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/01\/discrete-mercure-pointe-sous-la-lune-a-laube\/","title":{"rendered":"Discr\u00e8te, Mercure pointe sous la Lune \u00e0 l&#8217;aube"},"content":{"rendered":"<p><strong>Ce premier jour du mois de septembre, Mercure a fait une timide apparition sous le croissant de Lune avant le lever du Soleil.\u00a0<\/strong><\/p>\n<h5>Messager des Dieux :<\/h5>\n<p>Mercure, c&#8217;est un peu l&#8217;Arl\u00e9sienne du Syst\u00e8me solaire. Plus proche plan\u00e8te du <a href=\"https:\/\/www.futura-sciences.com\/sciences\/espace\/systeme-solaire\/soleil\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a>, elle est toujours d\u00e9licate \u00e0 observer. Elle est perdue dans les lueurs de l\u2019aube ou du cr\u00e9puscule. Les premiers \u00c9gyptiens ont d\u2019ailleurs longtemps cru qu\u2019il s\u2019agissait de deux astres diff\u00e9rents : un le soir, un autre le matin. Mais si vous savez \u00e0 quel moment et dans quelle direction regarder, vous la trouverez facilement en raison de son \u00e9clat assez \u00e9lev\u00e9. C\u2019est d\u2019ailleurs sa luminosit\u00e9 qui avait permis aux Sum\u00e9riens de la rep\u00e9rer d\u00e8s l\u2019Antiquit\u00e9 :<\/p>\n<figure id=\"attachment_20044\" aria-describedby=\"caption-attachment-20044\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2.jpg\" rel=\"lightbox[20043]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-20044\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2-1024x614.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2024\/09\/mercure2.jpg 1500w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-20044\" class=\"wp-caption-text\">Mercure \u00e0 l&#8217;aube du 01\/09\/24, bo\u00eetier Panasonic FZ 82. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>En raison de son d\u00e9placement tr\u00e8s rapide (la plan\u00e8te met seulement 88 jours pour faire le tour du Soleil), les Romains lui avaient donn\u00e9 le nom du dieu du commerce. Chez les Grecs cet astre \u00e9tait assimil\u00e9 \u00e0 Herm\u00e8s, le Messager des Dieux. Comme je vous l&#8217;ai pr\u00e9cis\u00e9 dans les <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/08\/31\/ephemerides-le-ciel-du-mois-de-septembre-2024\/\" target=\"_blank\" rel=\"noopener\">\u00e9ph\u00e9m\u00e9rides<\/a>, vous avez une quinzaine de jours pour tenter de la rep\u00e9rer avant qu&#8217;elle ne replonge dans les lueurs solaires.<\/p>\n<p><!--more--><\/p>\n<h5>Plan\u00e8te oubli\u00e9e :<\/h5>\n<p>Vous pourriez \u00eatre tent\u00e9 de pointer un <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2023\/01\/11\/peut-on-choisir-son-premier-telescope-sans-se-tromper\/\" target=\"_blank\" rel=\"noopener\">t\u00e9lescope<\/a> vers Mercure. N\u2019imaginez surtout pas d\u00e9couvrir des d\u00e9tails \u00e0 sa surface ! Toujours tr\u00e8s basse sur l\u2019horizon, la premi\u00e8re plan\u00e8te du Syst\u00e8me solaire ne montre qu\u2019un petit point tremblotant malmen\u00e9 par la turbulence atmosph\u00e9rique. Depuis la disparition de l\u2019orbiteur am\u00e9ricain <a title=\"Clap de fin pour la sonde Messenger sur Mercure\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/05\/02\/clap-de-fin-pour-la-sonde-messenger-sur-mercure\/\" target=\"_blank\" rel=\"noopener\">Messenger<\/a>\u00a0il n\u2019y a d\u2019ailleurs plus aucune sonde pour \u00e9tudier cet astre, en attendant 2025 et les observations de\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/bepicolombo-bepicolombo-etonnante-protection-thermique-sonde-va-etudier-mercure-73243\/\" target=\"_blank\" rel=\"noopener\">BepiColombo<\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/05\/14\/le-rendez-vous-entre-la-lune-et-mercure-a-tenu-ses-promesses\/\" target=\"_blank\" rel=\"noopener\">Le rendez-vous entre la Lune et Mercure a tenu ses promesses<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/05\/22\/une-danseuse-aux-cotes-des-planetes-venus-et-mercure\/\" target=\"_blank\" rel=\"noopener\">Une danseuse aux c\u00f4t\u00e9s des plan\u00e8tes V\u00e9nus et Mercure<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/11\/12\/en-video-sdo-filme-le-transit-de-mercure-depuis-lespace\/\" target=\"_blank\" rel=\"noopener\">En vid\u00e9o : SDO filme le transit de Mercure depuis l\u2019espace<\/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>.<\/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>Ce premier jour du mois de septembre, Mercure a fait une timide apparition sous le croissant de Lune avant le lever du Soleil.\u00a0 Messager des Dieux : Mercure, c&#8217;est un peu l&#8217;Arl\u00e9sienne du Syst\u00e8me solaire. Plus proche plan\u00e8te du Soleil, elle est toujours d\u00e9licate \u00e0 observer. Elle est perdue dans les lueurs de l\u2019aube ou &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2024\/09\/01\/discrete-mercure-pointe-sous-la-lune-a-laube\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Discr\u00e8te, Mercure pointe sous la Lune \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":20044,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[140],"class_list":["post-20043","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-mercure"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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