Local Group

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The Local Group is the group of galaxies that includes Earth's galaxy, the Milky Way. The group comprises more than 30 galaxies (including dwarf galaxies), with its gravitational center located somewhere between the Milky Way and the Andromeda Galaxy. The galaxies of the Local Group cover a 10 million light-year diameter (see 1 E+22 m for distance comparisons) and have a binary (dumbbell)[1] shape. The group is estimated to have a total mass of (1.29 ± 0.14)×1012M.[1] The group itself is part of the Virgo Supercluster (i.e. the Local Supercluster).[2]

The two most massive members of the group are the Milky Way and the Andromeda Galaxy. These two Spiral Galaxies each have a system of satellite galaxies.

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