The Medusa Nebula (also known as Abell 21) is an old planetary nebula some 1,500 light-years away along the southern border of the constellation Gemini.


The Medusa Nebula (also known as Abell 21) is an old planetary nebula some 1,500 light-years away along the southern border of the constellation Gemini. from spaceporn

By /u/Queen0fPentacles

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