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Thor’s Helmet Nebula

The above image of Thor’s Helmet Nebula was chosen as the winner of a competition during ESO’s 50th anniversary celebration. The nebula is located roughly…


Images of the Necklace Nebula

The Necklace Nebula (PN G054.2-03.4) is a planetary nebula situated in the northern constellation Sagitta, and is located about 15,000 light-years away. It was first…