{"id":2140,"date":"2015-03-12T14:33:34","date_gmt":"2015-03-12T14:33:34","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=2140"},"modified":"2015-03-22T06:52:49","modified_gmt":"2015-03-22T06:52:49","slug":"3-astronomes-amateurs-decouvrent-une-nebuleuse-planetaire","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/12\/3-astronomes-amateurs-decouvrent-une-nebuleuse-planetaire\/","title":{"rendered":"3 amateurs d\u00e9couvrent une n\u00e9buleuse plan\u00e9taire"},"content":{"rendered":"

Thierry Demange<\/a>, Richard Galli<\/a> et Thomas Petit<\/a> sont trois astronomes <\/a>amateurs alsaciens qui sont \u00a0devenus c\u00e9l\u00e8bres depuis quelques jours. Ils ont en effet d\u00e9couvert une nouvelle n\u00e9buleuse plan\u00e9taire<\/a> dans le ciel de l’h\u00e9misph\u00e8re sud (image ci-dessous).<\/p>\n

\"crop_DeGaPe1\"<\/a><\/p>\n

Accrocher son nom au firmament est le r\u00eave de tout astronome amateur, que ce soit en d\u00e9couvrant une com\u00e8te (on pense \u00e0 Terry Lovejoy, cet australien qui a d\u00e9nich\u00e9 il y a quelques mois son cinqui\u00e8me astre chevelu, C\/2014 Q2<\/a>) ou une nouvelle n\u00e9buleuse plan\u00e9taire, comme le fit le fran\u00e7ais Pascal Le D\u00fb<\/a> en 2011 depuis son observatoire breton.<\/p>\n

\"APO_Team_2000pix\"<\/a><\/p>\n

Comme Pascal Le D\u00fb, les 3 astronomes alsaciens, membres de la F\u00e9d\u00e9ration des Associations des Astronomes Amateurs d’Alsace (F4A<\/a>), ont d\u00e9couvert une n\u00e9buleuse plan\u00e9taire qui a \u00e9t\u00e9 baptis\u00e9e en leur honneur DeGaPe 1 (Demange, Galli, Petit).<\/p>\n

DeGaPe 1, dont la d\u00e9couverte a \u00e9t\u00e9 officiellement confirm\u00e9e par l’astrophysicienne Agn\u00e8s Acker<\/a>, se situe dans la constellation australe des Voiles<\/a>, au milieu des restes gazeux d’une supernova <\/a>vieille de 11 000 ans.<\/p>\n

Les 3 amateurs alsaciens ont rep\u00e9r\u00e9 la discr\u00e8te n\u00e9buleuse plan\u00e9taire (qui n’\u00e9tait alors r\u00e9f\u00e9renc\u00e9e dans aucun catalogue d’objets astronomiques) en \u00e9tudiant un clich\u00e9 qu’ils ont r\u00e9alis\u00e9 \u00e0 distance avec une lunette astronomique <\/a>de 150 mm de diam\u00e8tre install\u00e9e dans leur observatoire <\/a>en plein d\u00e9sert d’Atacama au Chili. Ils s’\u00e9taient rendus au Chili en octobre 2014 pour y installer cet instrument et en avaient profit\u00e9 pour r\u00e9aliser un triple selfie <\/a>sous la Voie lact\u00e9e<\/a> (image ci-dessus).<\/p>\n

Avec le ciel le plus noir du monde, le d\u00e9sert d’Atacama attire les astronomes amateurs et professionnels ; on y trouve entre autres le r\u00e9seau de t\u00e9lescopes g\u00e9ants \u00a0VLT <\/a>et bient\u00f4t l’E-ELT<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Thierry Demange, Richard Galli et Thomas Petit sont trois astronomes amateurs alsaciens qui sont \u00a0devenus c\u00e9l\u00e8bres depuis quelques jours. Ils ont en effet d\u00e9couvert une nouvelle n\u00e9buleuse plan\u00e9taire dans le ciel de l’h\u00e9misph\u00e8re sud (image ci-dessous). Accrocher son nom au firmament est le r\u00eave de tout astronome amateur, que ce soit en d\u00e9couvrant une com\u00e8te … Continuer la lecture de 3 amateurs d\u00e9couvrent une n\u00e9buleuse plan\u00e9taire<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":8,"featured_media":2143,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[509],"tags":[907,94,635,701,908,906,634,632,905,896,904,902,849,403,685,901,903,637],"class_list":["post-2140","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-agnes-acker","tag-astronome","tag-chili","tag-comete-c2014-q2-lovejoy","tag-constellation-des-voiles","tag-degape-1","tag-desert-datacama","tag-e-elt","tag-f4a","tag-nebuleuse-planetaire","tag-pascal-le-du","tag-richard-galli","tag-selfie","tag-supernova","tag-terry-lovejoy","tag-thierry-demange","tag-thomas-petit","tag-vlt"],"yoast_head":"\n3 amateurs d\u00e9couvrent une n\u00e9buleuse plan\u00e9taire<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2015\/03\/12\/3-astronomes-amateurs-decouvrent-une-nebuleuse-planetaire\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3 amateurs d\u00e9couvrent une n\u00e9buleuse plan\u00e9taire\" \/>\n<meta property=\"og:description\" content=\"Thierry Demange, Richard Galli et Thomas Petit sont trois astronomes amateurs alsaciens qui sont \u00a0devenus c\u00e9l\u00e8bres depuis quelques jours. 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