{"id":6143,"date":"2016-07-29T06:18:48","date_gmt":"2016-07-29T06:18:48","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=6143"},"modified":"2016-08-14T07:32:55","modified_gmt":"2016-08-14T07:32:55","slug":"vieille-lune-passe-devant-lamas-hyades","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/07\/29\/vieille-lune-passe-devant-lamas-hyades\/","title":{"rendered":"La vieille Lune passe devant l&#8217;amas des Hyades"},"content":{"rendered":"<p><strong>Ce vendredi 29 juillet avant l&#8217;aube, un vieux croissant de Lune avait rendez-vous avec l&#8217;amas des Hyades et la brillante \u00e9toile Ald\u00e9baran.<\/strong><\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/04\/25\/simeis-147-un-remanent-de-supernova-dans-le-taureau\/\" target=\"_blank\">La constellation du Taureau<\/a> est riche de deux beaux amas d&#8217;\u00e9toiles, l&#8217;amas des Hyades et celui des Pl\u00e9iades. Ce matin, une centaine d&#8217;heures avant la Nouvelle Lune, notre satellite naturel passait devant les \u00e9toiles des Hyades (cadrage horizontal) alors qu&#8217;un peu plus haut tr\u00f4nait l&#8217;amas des Pl\u00e9iades (cadrage vertical). Les deux images ont \u00e9t\u00e9 r\u00e9alis\u00e9es avec un objectif de 50 millim\u00e8tres de focale ouvert \u00e0 2,8 et une pose de 5 secondes \u00e0 400 iso.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1.jpg\" rel=\"lightbox[6143]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6144\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1-450x305.jpg\" alt=\"hyades1\" width=\"450\" height=\"305\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1-450x305.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1-768x520.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1-1024x694.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades1.jpg 1328w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Je vous ai d\u00e9j\u00e0 plusieurs fois parl\u00e9 de l\u2019amas des Pl\u00e9iades (Messier 45) sur ce blog, notamment quand la <a title=\"La com\u00e8te C\/2014 Q2 Lovejoy et l\u2019amas des Pleiades\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/01\/18\/la-comete-c2014-q2-lovejoy-et-lamas-des-pleiades\/\" target=\"_blank\">com\u00e8te C\/2014 Q2 Lovejoy<\/a> est pass\u00e9e \u00e0 proximit\u00e9.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2.jpg\" rel=\"lightbox[6143]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-6145\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2-301x450.jpg\" alt=\"hyades2\" width=\"301\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2-301x450.jpg 301w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2-768x1149.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2-684x1024.jpg 684w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/07\/hyades2.jpg 900w\" sizes=\"auto, (max-width: 301px) 100vw, 301px\" \/><\/a><\/p>\n<p><span id=\"more-2000\"><\/span>L\u2019amas des Hyades, m\u00eame s\u2019il compte environ dix fois moins d\u2019\u00e9toiles que M 45, est tr\u00e8s int\u00e9ressant \u00e0 observer \u00e9galement car c\u2019est l\u2019amas ouvert le plus proche du Syst\u00e8me solaire (150 ann\u00e9es-lumi\u00e8re).<!--more--><\/p>\n<p>Les astrophysiciens ont remarqu\u00e9 que les \u00e9toiles des Hyades et de l\u2019amas de la Cr\u00e8che, <a title=\"Messier 44 et Jupiter\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/10\/01\/messier-44-et-jupiter\/\" target=\"_blank\">M 44<\/a>, ont des caract\u00e9ristiques communes, preuve qu\u2019elles sont n\u00e9es dans la m\u00eame r\u00e9gion de notre <a title=\"La Voie lact\u00e9e et le ch\u00e2teau\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2014\/08\/05\/voie-lactee-chateau\/\" target=\"_blank\">Galaxie<\/a>. Curieusement, l\u2019\u00e9toile la plus brillantes des Hyades, Ald\u00e9baran (qui repr\u00e9sente l\u2019\u0153il du Taureau), est deux fois plus proche de nous et ne fait donc pas partie de l\u2019amas.<\/p>\n<p>Notez enfin que l\u2019amas des Hyades n\u2019a pas \u00e9t\u00e9 inclus dans son c\u00e9l\u00e8bre <a title=\"Astronomie : le catalogue Messier a 250 ans\" href=\"http:\/\/www.futura-sciences.com\/magazines\/espace\/infos\/actu\/d\/astronomie-astronomie-catalogue-messier-250-ans-16597\/\" target=\"_blank\">catalogue <\/a>par l\u2019astronome Charles Messier : il n\u2019y a donc pas de \u00ab\u00a0M\u00a0\u00bb pour d\u00e9signer cet amas, qui est cependant enregistr\u00e9 dans deux autres catalogues sous les noms de <a title=\"The Melotte Catalog of Star Clusters\" href=\"http:\/\/deepskypedia.com\/wiki\/The_Melotte_Catalogue_of_Star_Clusters\" target=\"_blank\">Melotte <\/a>25 ou <a title=\"The Collinder Catalog of Open Star Clusters\" href=\"http:\/\/www.cloudynights.com\/page\/articles\/cat\/articles\/the-collinder-catalog-updated-r2467\" target=\"_blank\">Collinder<\/a> 50.<\/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 vendredi 29 juillet avant l&#8217;aube, un vieux croissant de Lune avait rendez-vous avec l&#8217;amas des Hyades et la brillante \u00e9toile Ald\u00e9baran. La constellation du Taureau est riche de deux beaux amas d&#8217;\u00e9toiles, l&#8217;amas des Hyades et celui des Pl\u00e9iades. Ce matin, une centaine d&#8217;heures avant la Nouvelle Lune, notre satellite naturel passait devant les &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/07\/29\/vieille-lune-passe-devant-lamas-hyades\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">La vieille Lune passe devant l&#8217;amas des Hyades<\/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":6144,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[373,863,713,867,132,866,1032],"class_list":["post-6143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-aldebaran","tag-amas-des-hyades","tag-amas-des-pleiades","tag-collinder-50","tag-constellation-du-taureau","tag-melotte-25","tag-vieille-lune"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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