Wolf_rayet2
Quelle: By Yves Grosdidier (University of Montreal and Observatoire de Strasbourg), Anthony Moffat (Universitie de Montreal), Gilles Joncas (Universite Laval), Agnes Acker (Observatoire de Strasbourg), and NASA – http://hubblesite.org/newscenter/archive/releases/1998/38/image/a/ (direct link), Public Domain, https://commons.wikimedia.org/w/index.php?curid=294974
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