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. via /r/spaceporn http://bit.ly/2KeECYp
via Tumblr http://bit.ly/2VqvBMU
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. via /r/spaceporn http://bit.ly/2KeECYp
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