{"id":11463,"date":"2020-02-20T20:39:33","date_gmt":"2020-02-20T20:39:33","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=11463"},"modified":"2020-03-05T10:22:17","modified_gmt":"2020-03-05T10:22:17","slug":"en-video-dans-le-brianconnais-le-lac-laramon-sous-les-etoiles","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2020\/02\/20\/en-video-dans-le-brianconnais-le-lac-laramon-sous-les-etoiles\/","title":{"rendered":"En vid\u00e9o : dans le Brian\u00e7onnais, le lac Laramon sous les \u00e9toiles"},"content":{"rendered":"

Deux astrophotographes ont uni leurs images dans un tr\u00e8s beau time-lapse<\/em> qui d\u00e9voile le ciel \u00e9toil\u00e9 en \u00e9t\u00e9 depuis le lac Laramon dans le Brian\u00e7onnais.\u00a0<\/strong><\/p>\n

Randonn\u00e9e dans les Hautes-Alpes :<\/h5>\n

Le lac Laramon (2.359 m) se situe dans la vall\u00e9e de la Clar\u00e9e au-dessus de Fontcouverte (Brian\u00e7onnais, Hautes-Alpes). Il est le but d’une jolie randonn\u00e9e d’un peu moins de 4 heures en partant de N\u00e9vache. C’est l\u00e0 que les photographes Dominique Joubert<\/a> et Jean-Philippe Kornmann<\/a> (membres du GAD<\/a>, le Groupe d’Astronomie du Dauphin\u00e9) se sont install\u00e9s pendant une nuit de l’\u00e9t\u00e9 2019.<\/p>\n

https:\/\/vimeo.com\/373596888<\/p>\n

Profitant du beau temps et de l’absence de pollution lumineuse<\/a>, ils ont r\u00e9alis\u00e9 cette vid\u00e9o. Concr\u00e8tement ils ont utilis\u00e9 4 bo\u00eetiers dont 3 d\u00e9filtr\u00e9s (2 Canon 6D \/ 2 Nikon D610), 3 focales diff\u00e9rentes (24mm, 50mm, 85mm), 2 montures \u00e9quatoriales (Star Adventurer Mini) ainsi que 2 \u00e9quipements pour assurer les mouvements (Rail Syrp Genie II, et 2 Platines Genie Mini). 10 s\u00e9quences ont \u00e9t\u00e9 tourn\u00e9es pour un total de 4.700 photos. Au final ce sont 8 s\u00e9quences et 2.250 images qui ont \u00e9t\u00e9 retenues pour le montage final.<\/p>\n

Honneur \u00e0 la Voie lact\u00e9e :<\/h5>\n

Ce time-lapse fait la part belle \u00e0 la Voie lact\u00e9e<\/a>, cette tra\u00een\u00e9e d’\u00e9toiles qui traverse le ciel du NORD au SUD pendant les nuits d’\u00e9t\u00e9. \u00c0 cette altitude et loin des lumi\u00e8res parasites les deux astrophotographes ont su capter toute la richesse de ce fuseau lumineux. On distingue au milieu d’une multitude de soleils lointains des n\u00e9buleuses en \u00e9mission (comme la Lagune<\/a>) \u00e0 dominante rouge, la couleur de la raie de l’hydrog\u00e8ne alpha \u00e0 656,3 nanom\u00e8tres de longueur d’onde. En outre quelques amas d’\u00e9toiles ou\u00a0 encore de sombres nuages de poussi\u00e8res interstellaires sont pr\u00e9sents. La plan\u00e8te Jupiter<\/a> est visible comme un large point brillant au SUD-OUEST de la Voie lact\u00e9e. Vous noterez \u00e9galement le passage de nombreux avions sous la forme de traits lumineux se d\u00e9pla\u00e7ant rapidement en ligne droite.<\/p>\n

\u00c0 savoir :<\/h5>\n

Un time-lapse<\/em> est une vid\u00e9o dans laquelle on compile plusieurs heures de prises de vues en seulement quelques minutes. C\u2019est un moyen permettant d\u2019acc\u00e9l\u00e9rer le mouvement apparent des astres d\u2019EST en OUEST au cours de la nuit. Ce proc\u00e9d\u00e9 est utilis\u00e9\u00a0 par d\u2019autres photographes comme Matt Dieterich (Parc national du Mont Rainier<\/a>) ou Chris Pritchard (Skylight<\/em><\/a>). D\u00e9couvrez \u00e9galement les vid\u00e9os de Gianluca Lombardi (un t\u00e9lescope g\u00e9ant sous le ciel des Canaries<\/a>) ou encore de Maciej Tomkow (Undisturbed Places<\/a><\/em>).<\/p>\n","protected":false},"excerpt":{"rendered":"

Deux astrophotographes ont uni leurs images dans un tr\u00e8s beau time-lapse qui d\u00e9voile le ciel \u00e9toil\u00e9 en \u00e9t\u00e9 depuis le lac Laramon dans le Brian\u00e7onnais.\u00a0 Randonn\u00e9e dans les Hautes-Alpes : Le lac Laramon (2.359 m) se situe dans la vall\u00e9e de la Clar\u00e9e au-dessus de Fontcouverte (Brian\u00e7onnais, Hautes-Alpes). Il est le but d’une jolie randonn\u00e9e … Continuer la lecture de En vid\u00e9o : dans le Brian\u00e7onnais, le lac Laramon sous les \u00e9toiles<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":11495,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[84],"tags":[2759,1361,2669,2758,1013],"class_list":["post-11463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciel-etoile","tag-brianconnais","tag-dominique-joubert","tag-jean-philippe-kornmann","tag-lac-laramon","tag-video"],"yoast_head":"\nEn vid\u00e9o : dans le Brian\u00e7onnais, le lac Laramon sous les \u00e9toiles<\/title>\n<meta name=\"description\" content=\"Deux astrophotographes ont uni leurs images dans un tr\u00e8s beau time-lapse qui d\u00e9voile le ciel \u00e9toil\u00e9 en \u00e9t\u00e9 depuis le lac Laramon dans le 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