Andromeda galaxy

See Andromeda (disambiguation) for other uses of "Andromeda". The Andromeda Galaxy (, also known as Messier 31, M31, or NGC 224; older texts often called it the Great Andromeda Nebula) is a spiral galaxy approximately 2.5 million light-years away in the constellation Andromeda. It is the nearest spiral galaxy to our own, the Milky Way.
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Noun
1. a spiral galaxy in the constellation of Andromeda that is visible to the naked eye
(hypernym) spiral galaxy, spiral nebula

The nearest spiral galaxy to our own Milky Way. It is 2.2 million light years away and contains in the region of 4 x 1011 stars. The Andromeda galaxy is believed to be a twin of the Milky Way. Their combined gravitational influence dominates the Local Group of galaxies. It is designated M31 in the Messier Catalogue and NGC 224 in the New General Catalogue. Andromeda is surrounded by a number of satellite galaxies and globular clusters. [ Picture ].

GALASSIA DI ANDROMEDA