{"id":4906,"date":"2016-02-23T17:33:51","date_gmt":"2016-02-23T17:33:51","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=4906"},"modified":"2019-12-14T20:25:13","modified_gmt":"2019-12-14T20:25:13","slug":"zoom-sur-ngc-986-une-superbe-galaxie-spirale-barree","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/23\/zoom-sur-ngc-986-une-superbe-galaxie-spirale-barree\/","title":{"rendered":"Zoom sur NGC 986, une superbe galaxie spirale barr\u00e9e"},"content":{"rendered":"<p><strong>L&#8217;ESO nous propose une nouvelle image r\u00e9alis\u00e9e \u00e0 l&#8217;aide du <em>Very Large Telescope<\/em>. Il s&#8217;agit de NGC 986, une galaxie dans la constellation du Fourneau.<\/strong><\/p>\n<p>Entre 1750 et 1754 Nicolas-Louis de Lacaille effectua un grand voyage dans l&#8217;h\u00e9misph\u00e8re sud o\u00f9 il avait \u00e9t\u00e9 envoy\u00e9 pour mesurer l&#8217;arc du m\u00e9ridien. L&#8217;astronome fran\u00e7ais en profita pour cr\u00e9er l&#8217;<a href=\"http:\/\/www.saao.ac.za\/\" target=\"_blank\" rel=\"noopener noreferrer\">Observatoire du Cap<\/a> (Afrique du Sud) o\u00f9 il r\u00e9alisa un grand nombre d&#8217;observations astronomiques.<\/p>\n<p>Il red\u00e9coupa le ciel austral en y glissant 14 nouvelles constellations. Celle du Fourneau est particuli\u00e8rement discr\u00e8te puisque l&#8217;\u00e9toile la plus brillante n&#8217;est que de <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/05\/06\/quest-lechelle-magnitudes-astronomie\/\" target=\"_blank\" rel=\"noopener noreferrer\">magnitude<\/a> 3,8 !<\/p>\n\n<!-- iframe plugin v.5.1 wordpress.org\/plugins\/iframe\/ -->\n<iframe loading=\"lazy\" frameborder=\"0\" width=\"480\" height=\"270\" src=\"\/\/www.dailymotion.com\/embed\/video\/x38yxc3\" 0=\"allowfullscreen&gt;&lt;\/iframe\" scrolling=\"yes\" class=\"iframe-class\"><\/iframe>\n\n<p style=\"text-align: center\"><strong>En vid\u00e9o : les 10 plus grandes d\u00e9couvertes des t\u00e9lescopes de l&#8217;ESO<\/strong><\/p>\n<p>C&#8217;est dans la constellation du Fourneau que se situe NGC 986, une galaxie spirale barr\u00e9e de onzi\u00e8me magnitude qui fut d\u00e9couverte en 1828 par l&#8217;astronome australien James Dunlop depuis l&#8217;observatoire priv\u00e9 de Thomas Brisbane dont il \u00e9tait l&#8217;assistant.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso.jpg\"  rel=\"lightbox[4906] attachment wp-att-4908\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-4908\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso-450x318.jpg\" alt=\"eso\" width=\"450\" height=\"318\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso-450x318.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso-768x543.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso-1024x724.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2016\/02\/eso.jpg 1273w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Les galaxies spirales barr\u00e9es se caract\u00e9risent par la pr\u00e9sence en leur centre d&#8217;une bande d&#8217;\u00e9toiles dont les extr\u00e9mit\u00e9s se prolongent par des bras spiraux, contrairement aux galaxies spirales ordinaires dans lesquelles les bras \u00e9mergent directement\u00a0du noyau.<\/p>\n<p><!--more-->Sur cette image de l&#8217;<a href=\"https:\/\/www.eso.org\/public\/france\/images\/potw1605a\/\" target=\"_blank\" rel=\"noopener noreferrer\">ESO<\/a> obtenue \u00e0 l&#8217;aide du spectrographe grand champ <a href=\"http:\/\/www.eso.org\/public\/teles-instr\/vlt\/vlt-instr\/fors\/\" target=\"_blank\" rel=\"noopener noreferrer\">FORS<\/a> (<em>FOcal Reducer and low dispersion Spectrograph<\/em>) install\u00e9 sur le <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/28\/en-video-le-centre-galactique-passe-au-zenith-du-vlt\/\" target=\"_blank\" rel=\"noopener noreferrer\">VLT<\/a>, on remarquera la pr\u00e9sence de plusieurs r\u00e9gions roses dans la galaxie NGC 986 (de futures pouponni\u00e8res stellaires) ainsi qu&#8217;un poudroiement \u00a0de jeunes \u00e9toiles bleues dispers\u00e9es entre les bras spiraux.<\/p>\n<p>De nombreuses galaxies beaucoup plus lointaines sont \u00e9galement pr\u00e9sentes dans le champ sous la forme de petites taches floues plus ou moins allong\u00e9es.<\/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>L&#8217;ESO nous propose une nouvelle image r\u00e9alis\u00e9e \u00e0 l&#8217;aide du Very Large Telescope. Il s&#8217;agit de NGC 986, une galaxie dans la constellation du Fourneau. Entre 1750 et 1754 Nicolas-Louis de Lacaille effectua un grand voyage dans l&#8217;h\u00e9misph\u00e8re sud o\u00f9 il avait \u00e9t\u00e9 envoy\u00e9 pour mesurer l&#8217;arc du m\u00e9ridien. L&#8217;astronome fran\u00e7ais en profita pour cr\u00e9er &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2016\/02\/23\/zoom-sur-ngc-986-une-superbe-galaxie-spirale-barree\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Zoom sur NGC 986, une superbe galaxie spirale barr\u00e9e<\/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":4908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[1478,633,1477,1476,637],"class_list":["post-4906","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-constellation-du-fourneau","tag-eso","tag-galaxie-spirale-barree","tag-ngc-986","tag-vlt"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Zoom sur NGC 986, une superbe galaxie spirale barr\u00e9e<\/title>\n<meta name=\"description\" content=\"L&#039;ESO nous propose une nouvelle image r\u00e9alis\u00e9e \u00e0 l&#039;aide du\u00a0Very Large Telescope. 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