{"id":15868,"date":"2022-05-20T16:58:51","date_gmt":"2022-05-20T16:58:51","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=15868"},"modified":"2022-06-22T16:13:01","modified_gmt":"2022-06-22T16:13:01","slug":"des-milliers-de-galaxies-se-cachent-dans-la-vierge","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/05\/20\/des-milliers-de-galaxies-se-cachent-dans-la-vierge\/","title":{"rendered":"Des milliers de galaxies se cachent dans la Vierge"},"content":{"rendered":"<p><strong>Nich\u00e9 dans la constellation de la Vierge, un immense amas de galaxies ne cesse de fasciner les astronomes depuis sa d\u00e9couverte par Messier.<\/strong><\/p>\n<h5>Une constellation difficile \u00e0 visualiser :<\/h5>\n<p>Coinc\u00e9e entre le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/23\/en-mai-decouvrez-le-celebre-triplet-de-galaxies-du-lion\/\" target=\"_blank\" rel=\"noopener\">Lion<\/a> \u00e0 l&#8217;Ouest et la Balance \u00e0 l&#8217;Est, la Vierge a une forme peu \u00e9vocatrice. Cette grande constellation (la plus \u00e9tendue apr\u00e8s l&#8217;Hydre), n&#8217;\u00e9voque gu\u00e8re les grandes d\u00e9esses de l&#8217;Antiquit\u00e9 qui y sont associ\u00e9es. Heureusement que sa plus brillante \u00e9toile, <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/11\/18\/venus-aux-cotes-de-letoile-spica-de-la-vierge\/\" target=\"_blank\" rel=\"noopener\">Spica<\/a>, est facilement rep\u00e9rable. Pour la d\u00e9nicher, partez de la <a href=\"https:\/\/www.futura-sciences.com\/sciences\/questions-reponses\/astronomie-mythologie-legende-grande-ourse-7889\/\" target=\"_blank\" rel=\"noopener\">Grande Ourse<\/a>. Suivez l&#8217;arc de cercle form\u00e9 par le manche de la \u00ab casserole \u00bb jusqu&#8217;\u00e0 <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/01\/04\/la-comete-c2013-us-10-catalina-frole-arcturus\/\" target=\"_blank\" rel=\"noopener\">Arcturus<\/a> (Bouvier). Dans le prolongement de cet arc, vous trouverez Spica.<\/p>\n<figure id=\"attachment_15869\" aria-describedby=\"caption-attachment-15869\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne.jpg\" rel=\"lightbox[15868]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15869\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/nuit_vienne.jpg 1498w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15869\" class=\"wp-caption-text\">La Vierge et ses voisines en d\u00e9but de nuit au printemps. \u00a9 Jean-Baptiste Feldmann<\/figcaption><\/figure>\n<p>Fin avril, j&#8217;ai pu photographier la Vierge depuis un \u00e9tang dans la Vienne. Merci \u00e0 ma compagne Christine qui a particip\u00e9 \u00e0 la composition de cette image (30 secondes de pose \u00e0 4000 iso, Nikon D7100, objectif 12 millim\u00e8tres de focale ouvert \u00e0 3,5). Les annotations sont de <a href=\"https:\/\/www.facebook.com\/jean.aimar.71\" target=\"_blank\" rel=\"noopener\">Jean-Fran\u00e7ois<\/a> que je remercie \u00e9galement.<!--more--><\/p>\n<h5>Galaxies \u00e0 foison :<\/h5>\n<p>L&#8217;astronome Charles Messier fut le premier \u00e0 rep\u00e9rer des galaxies dans la Vierge en 1781. Il les consigna dans son c\u00e9l\u00e8bre catalogue. Sur ce superbe clich\u00e9 de Rogelio Bernal Andreo (<a href=\"http:\/\/www.deepskycolors.com\/about.html\" target=\"_blank\" rel=\"noopener\"><em>Deep Sky Colors<\/em><\/a>), leur num\u00e9ro est pr\u00e9c\u00e9d\u00e9 de la lettre &#8220;M&#8221; pour Messier :<\/p>\n<figure id=\"attachment_15871\" aria-describedby=\"caption-attachment-15871\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge.jpg\" rel=\"lightbox[15868]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15871\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge-450x243.jpg\" alt=\"\" width=\"450\" height=\"243\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge-450x243.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge-1024x552.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge-768x414.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge-1536x828.jpg 1536w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge.jpg 1615w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15871\" class=\"wp-caption-text\">Une multitude de galaxies sont visibles dans la Vierge. \u00a9 Rogelio Bernal Andreo<\/figcaption><\/figure>\n<p>M 58, 59, 60, 84, 86, 87, 88, 89, 90, 104 : voil\u00e0 de quoi occuper les astronomes amateurs, m\u00eame modestement \u00e9quip\u00e9s. Un plus gros t\u00e9lescope donnera acc\u00e8s \u00e0 de nombreuses galaxies <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-ngc-6380\/\" target=\"_blank\" rel=\"noopener\">NGC<\/a>, comme celles qui constituent la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/04\/23\/les-galaxies-de-la-chaine-de-markarian\/\" target=\"_blank\" rel=\"noopener\">Cha\u00eene de Markarian<\/a>. Les photographies r\u00e9alis\u00e9es \u00e0 la fin du XXe si\u00e8cle ont permis de d\u00e9nombrer entre 1.500 et 2.000 galaxies dans cet amas, situ\u00e9 \u00e0 une distance de 15 \u00e0 22 M\u00e9gaparsec (entre 50 et 70 millions d\u2019ann\u00e9es-lumi\u00e8re).<\/p>\n<figure id=\"attachment_15872\" aria-describedby=\"caption-attachment-15872\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge2.jpg\" rel=\"lightbox[15868]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-15872\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge2-450x385.jpg\" alt=\"\" width=\"450\" height=\"385\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge2-450x385.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge2-768x656.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/05\/amas_vierge2.jpg 971w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-15872\" class=\"wp-caption-text\">Position des principales galaxies de l&#8217;amas de la Vierge. \u00a9 IAU\/Sky and Telescope<\/figcaption><\/figure>\n<p>Il y a quelques ann\u00e9es, les astronomes professionnels ont lanc\u00e9 le NGVS (<a href=\"https:\/\/irfu.cea.fr\/dap\/Phocea\/Vie_des_labos\/Ast\/ast_visu.php?id_ast=2846\" target=\"_blank\" rel=\"noopener\"><em>Next Generation Virgo Cluster Survey<\/em><\/a>). Un projet qui a mobilis\u00e9 le t\u00e9lescope de 3,5 m\u00e8tres du <a href=\"https:\/\/www.cfht.hawaii.edu\/\" target=\"_blank\" rel=\"noopener\">CFHT<\/a> pendant plusieurs saisons (rappelons que les constellations ne sont pas visibles toute l&#8217;ann\u00e9e. La Vierge s&#8217;observe durant l&#8217;hiver et le printemps). Le d\u00e9pouillement de ce titanesque <em>Survey<\/em> devrait r\u00e9v\u00e9ler un nombre insoup\u00e7onn\u00e9 de galaxies encore m\u00e9connues.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/12\/24\/arp-116-un-etrange-couple-de-galaxies-dans-la-vierge\/\" target=\"_blank\" rel=\"noopener\">ARP 116, un \u00e9trange couple de galaxies dans la Vierge<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/05\/08\/une-supernova-explose-dans-la-galaxie-spirale-messier-61\/\" target=\"_blank\" rel=\"noopener\">Une supernova explose dans la galaxie spirale Messier 61<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/04\/11\/comment-reperer-ce-soir-m-87-la-galaxie-au-celebre-trou-noir\/\" target=\"_blank\" rel=\"noopener\">Comment rep\u00e9rer M 87, la galaxie au c\u00e9l\u00e8bre trou noir<\/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>Nich\u00e9 dans la constellation de la Vierge, un immense amas de galaxies ne cesse de fasciner les astronomes depuis sa d\u00e9couverte par Messier. Une constellation difficile \u00e0 visualiser : Coinc\u00e9e entre le Lion \u00e0 l&#8217;Ouest et la Balance \u00e0 l&#8217;Est, la Vierge a une forme peu \u00e9vocatrice. Cette grande constellation (la plus \u00e9tendue apr\u00e8s l&#8217;Hydre), &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/05\/20\/des-milliers-de-galaxies-se-cachent-dans-la-vierge\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Des milliers de galaxies se cachent dans la Vierge<\/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":15870,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[1843,112],"class_list":["post-15868","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-amas-de-la-vierge","tag-galaxie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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