{"id":10525,"date":"2019-05-07T17:05:10","date_gmt":"2019-05-07T17:05:10","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=10525"},"modified":"2021-04-09T12:09:23","modified_gmt":"2021-04-09T12:09:23","slug":"messier-51-la-superbe-galaxie-des-chiens-de-chasse","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/07\/messier-51-la-superbe-galaxie-des-chiens-de-chasse\/","title":{"rendered":"Zoom sur Messier 51, la superbe galaxie des Chiens de Chasse"},"content":{"rendered":"<p><strong>Nich\u00e9e dans la tr\u00e8s modeste constellation des Chiens de Chasse, Messier 51 est un passage oblig\u00e9 pour tout amoureux des belles galaxies.<\/strong><\/p>\n<h5>Une galaxie incontournable :<\/h5>\n<p>Vous savez que beaucoup d&#8217;astronomes ont eu leur vocation en d\u00e9couvrant <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2018\/09\/17\/saturne-la-planete-qui-fait-naitre-des-vocations\/\" target=\"_blank\" rel=\"noopener noreferrer\">Saturne<\/a> dans un instrument astronomique. Cependant ceux qui ont le bonheur d&#8217;admirer la galaxie Messier 51 dans un grand t\u00e9lescope ne sont pas en reste. Pour la trouver levez la t\u00eate : en d\u00e9but de nuit au printemps, vous rep\u00e9rerez facilement la <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/10\/07\/la-grande-ourse-et-la-cabotte-sous-la-lune\/\" target=\"_blank\" rel=\"noopener noreferrer\">Grande Ourse<\/a>. La discr\u00e8te constellation des Chiens de Chasse se trouve juste \u00e0 c\u00f4t\u00e9. Vous pouvez commencer \u00e0 rechercher cette galaxie spirale avec une <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/12\/10\/longue-vue-bon-choix-debuter-astronomie\/\" target=\"_blank\" rel=\"noopener\">longue-vue<\/a> ou une paire de jumelles (cartes de rep\u00e9rage sur <a href=\"https:\/\/binocularsky.com\/binoc_object_file.php?object_id=M51&amp;aperture=100\" target=\"_blank\" rel=\"noopener\">BinocularSky<\/a>).<\/p>\n<figure id=\"attachment_13905\" aria-describedby=\"caption-attachment-13905\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte.jpg\" rel=\"lightbox[10525]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-13905\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte-450x305.jpg\" alt=\"\" width=\"450\" height=\"305\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte-450x305.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte-1024x694.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte-768x520.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechassecarte.jpg 1278w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-13905\" class=\"wp-caption-text\">Position de la galaxie Messier 51 dans les Chiens de Chasse vers minuit. \u00a9 <a href=\"https:\/\/www.stelvision.com\/\" target=\"_blank\" rel=\"noopener\">Stelvision<\/a><\/figcaption><\/figure>\n<p>On surnomme \u00e9galement Messier 51 la galaxie du Tourbillon (<em>Whirlpool<\/em>). Elle est le r\u00e9sultat de la rencontre de deux galaxies. Une grande qui a une structure en spirale et une petite que l&#8217;on voit au bout d&#8217;un des \u00ab bras \u00bb de la spirale.<\/p>\n<p><!--more--><\/p>\n<h5>Curieuse d\u00e9couverte :<\/h5>\n<p>Le 13 octobre 1773 Charles Messier rep\u00e8re difficilement la structure spiral\u00e9e qu&#8217;il d\u00e9crit comme &#8220;une n\u00e9buleuse tr\u00e8s faible, sans \u00e9toiles&#8221;. Pourtant il faut attendre le 21 mars 1781 pour que Pierre M\u00e9chain signale l&#8217;existence d&#8217;un &#8220;compagnon&#8221; au bout du \u00ab bras \u00bb. Dans une nouvelle version de son <a href=\"https:\/\/www.futura-sciences.com\/sciences\/actualites\/astronomie-astronomie-catalogue-messier-250-ans-16597\/\" target=\"_blank\" rel=\"noopener noreferrer\">c\u00e9l\u00e8bre catalogue<\/a>, Messier ajoutera le commentaire suivant : &#8220;<em>elle est double, ayant chacune un centre brillant, \u00e9loign\u00e9 l&#8217;un de l&#8217;autre de 4&#8217;35<\/em>&#8220;. Finalement le <a href=\"https:\/\/www.futura-sciences.com\/sciences\/definitions\/astronomie-ngc-6380\/\" target=\"_blank\" rel=\"noopener noreferrer\"><em>New General Catalogue<\/em><\/a> fait la distinction : la structure en spirale se nomme NGC 5194 et la petite galaxie au bout du bras NGC 5195.<\/p>\n<figure id=\"attachment_13904\" aria-describedby=\"caption-attachment-13904\" style=\"width: 450px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse.jpg\" rel=\"lightbox[10525]\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-13904\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse-450x270.jpg\" alt=\"\" width=\"450\" height=\"270\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse-450x270.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse-1024x615.jpg 1024w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse-768x461.jpg 768w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2019\/05\/chiensdechasse.jpg 1498w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><figcaption id=\"caption-attachment-13904\" class=\"wp-caption-text\">La galaxie Messier 51 dans la constellation des Chiens de Chasse. \u00a9 Alexandre Piquelin<\/figcaption><\/figure>\n<h5>La belle image d&#8217;un amateur :<\/h5>\n<p><a href=\"https:\/\/www.flickr.com\/photos\/alexandrepiquelin\" target=\"_blank\" rel=\"noopener\">Alexandre Piquelin<\/a> est l&#8217;auteur de ce tr\u00e8s beau clich\u00e9. Cet amateur a utilis\u00e9 son t\u00e9lescope de 254 millim\u00e8tres de diam\u00e8tre (focale de 1.200 millim\u00e8tres) install\u00e9 sur une monture NEQ6 Pro Go-To. Le clich\u00e9 final ci-dessus repr\u00e9sente l&#8217;addition de 80 poses de 180 secondes pour la luminance et 10 poses de 300 secondes en H-alpha, toutes r\u00e9alis\u00e9es avec une cam\u00e9ra ASI 1600MM. Alexandre nous explique : &#8221; <em>Voici la fameuse galaxie &#8220;Gargantua&#8221; qui aspire sans piti\u00e9 sa petite voisine. On voit un fin nuage blanch\u00e2tre qui les enveloppe. Il s&#8217;agit de la mati\u00e8re \u00e9ject\u00e9e pendant la fusion de ces deux g\u00e9antes. Ce sont les r\u00e9sidus de bras spiraux qui ont \u00e9clat\u00e9 lors du choc de cette rencontre cosmique. Les poses en hydrog\u00e8ne alpha permettent de r\u00e9v\u00e9ler en rouge\/ros\u00e9 les n\u00e9buleuses en \u00e9mission au sein de la galaxie.<\/em>\u00a0&#8221;<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/03\/03\/pourquoi-le-coeur-de-la-galaxie-spirale-messier-94-est-il-si-brillant\/\" target=\"_blank\" rel=\"noopener\">Pourquoi le c\u0153ur de la galaxie Messier 94 est-il si brillant ?<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/11\/16\/la-galaxie-ngc-6946-nous-offre-un-tourbillon-stellaire\/\" target=\"_blank\" rel=\"noopener\">La galaxie NGC 6946 nous offre un tourbillon stellaire<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/11\/01\/feu-dartifice-dans-la-galaxie-de-la-roue-de-chariot\/\" target=\"_blank\" rel=\"noopener\">Feu d&#8217;artifice dans la galaxie de la Roue de chariot<\/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\u00e9e dans la tr\u00e8s modeste constellation des Chiens de Chasse, Messier 51 est un passage oblig\u00e9 pour tout amoureux des belles galaxies. Une galaxie incontournable : Vous savez que beaucoup d&#8217;astronomes ont eu leur vocation en d\u00e9couvrant Saturne dans un instrument astronomique. Cependant ceux qui ont le bonheur d&#8217;admirer la galaxie Messier 51 dans un &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2019\/05\/07\/messier-51-la-superbe-galaxie-des-chiens-de-chasse\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Zoom sur Messier 51, la superbe galaxie des Chiens de Chasse<\/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":13904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[3015,456,2089,1229,2654],"class_list":["post-10525","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-alexandre-piquelin","tag-constellation-de-la-grande-ourse","tag-constellation-des-chiens-de-chasse","tag-galaxie-spirale","tag-messier-51"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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