The Medusa Nebula is a large planetary nebula in the constellation of Gemini on the Canis Minor border. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by UCLA astronomer George O. Abell, who classified it as an old planetary nebula.

Distance to Earth: 1,500 light years

Magnitude: 15.99

Coordinates: RA 7h 29m 3s | Dec +13° 14′ 48″

Absolute magnitude (V): 7.68

Constellation: Gemini

Did you know: The Medusa Nebula spans approximately four light-years and lies at a distance of about 1,500 light-years.