{"id":7032,"date":"2017-01-01T11:16:01","date_gmt":"2017-01-01T11:16:01","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=7032"},"modified":"2017-04-22T07:22:36","modified_gmt":"2017-04-22T07:22:36","slug":"les-hyades-et-les-pleiades-derriere-le-moulin-de-verzenay","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2017\/01\/01\/les-hyades-et-les-pleiades-derriere-le-moulin-de-verzenay\/","title":{"rendered":"Les Hyades et les Pl\u00e9iades derri\u00e8re le moulin de Verzenay"},"content":{"rendered":"

Petit d\u00e9tour par le moulin de Verzenay, \u00e0 17 km de Reims, d’o\u00f9 l’on voit se lever en d\u00e9but de nuit les amas d’\u00e9toiles des Hyades et des Pl\u00e9iades.<\/strong><\/p>\n

Class\u00e9 monument historique, le moulin de Verzenay fut construit en 1818 sur le Mont-Boeuf et cessa de tourner en 1903 \u00e0 la mort du dernier meunier. Il est d\u00e9sormais propri\u00e9t\u00e9 de G.H. Mumm, une maison de champagne fond\u00e9e \u00e0 Reims en 1827.<\/p>\n

\"moulin2\"<\/a><\/p>\n

L’addition de 10 poses de 30 sec \u00e0 800 iso avec un objectif de 18 mm de focale r\u00e9v\u00e8le le lever des Hyades (juste \u00e0 droite du moulin) et des Pl\u00e9iades (un peu plus haut) en ce d\u00e9but de nuit d’hiver.\u00a0<\/p>\n

La constellation du Taureau<\/a> est riche de deux beaux amas d\u2019\u00e9toiles espac\u00e9s d’une dizaine de degr\u00e9s, l\u2019amas des Pl\u00e9iades et celui des Hyades.<\/p>\n

Dans la mythologie grecque, les Pl\u00e9iades \u00e9taient les sept filles d\u2019Atlas et de Pl\u00e9ion\u00e9. L’amas porte le nom de Messier 45, la r\u00e9f\u00e9rence de cet objet c\u00e9leste dans le catalogue de l\u2019astronome fran\u00e7ais Charles Messier<\/a> \u00e9tabli au XVIIIe si\u00e8cle.\u00a0Bien qu\u2019\u00e0 l\u2019\u0153il nu seules une douzaine d\u2019\u00e9toiles de l’amas soient visibles, les photographies r\u00e9alis\u00e9es avec de grands t\u00e9lescopes<\/a> ont permis d\u2019en d\u00e9nombrer environ 3.000. Cet objet c\u00e9leste s\u2019\u00e9tend sur une surface apparente de 2\u00b0 dans le ciel, l\u2019\u00e9quivalent de quatre fois la Pleine Lune<\/a>.<\/p>\n

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). Les astrophysiciens ont remarqu\u00e9 que les \u00e9toiles des Hyades et de l\u2019amas de la Cr\u00e8che (M 44<\/a>), ont des caract\u00e9ristiques communes, preuve qu\u2019elles sont n\u00e9es dans la m\u00eame r\u00e9gion de notre Galaxie<\/a>. Curieusement, l\u2019\u00e9toile la plus brillante des Hyades, Ald\u00e9baran<\/a> (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","protected":false},"excerpt":{"rendered":"

Petit d\u00e9tour par le moulin de Verzenay, \u00e0 17 km de Reims, d’o\u00f9 l’on voit se lever en d\u00e9but de nuit les amas d’\u00e9toiles des Hyades et des Pl\u00e9iades. Class\u00e9 monument historique, le moulin de Verzenay fut construit en 1818 sur le Mont-Boeuf et cessa de tourner en 1903 \u00e0 la mort du dernier meunier. … Continuer la lecture de Les Hyades et les Pl\u00e9iades derri\u00e8re le moulin de Verzenay<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":7033,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[373,863,713,1997,133,1998,437,1208,317,1996],"class_list":["post-7032","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-champagne","tag-charles-messier","tag-g-h-mumm","tag-messier-45","tag-moulin","tag-reims","tag-verzenay"],"yoast_head":"\nLes Hyades et les Pl\u00e9iades derri\u00e8re le moulin de Verzenay<\/title>\n<meta name=\"description\" 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