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Georges CHASSAIGNE
data ngc 7023
Présentation(Wikipédia)
NGC 7023, aussi appelée la nébuleuse de l'Iris ou encore Caldwell 4, est une nébuleuse par réflexion renfermant l'amas ouvert OCL 235 située dans la constellation de Céphée..
ngc 7023
The Iris Nebula(also known asNGC 7023orCaldwell 4) is a bright reflection nebula located about 1,300 light years from Earth in the constellation of Cepheus.