The Andromeda Galaxy, also known as Messier 31, M31, or NGC 224 (as seen from the Southern Hemisphere).
M31 is a large Spiral Galaxy approximately 2.5 million light-years from Earth. It is the nearest major Galaxy to the Milky Way, in the constellation of Andromeda. At approximately 220,000 light-years across, it is the largest Galaxy of the Local Group, which also contains the Milky Way Galaxy, the Triangulum Galaxy, and about 44 other smaller Galaxies.
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