Local Group


Local Group
the group of galaxies, at least 25 of which are known, that includes the Milky Way.
[1915-20]

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Concentration of about 40 galaxies to which the Milky Way Galaxy belongs.

Nearly half are dwarf elliptical galaxies, but the six largest are spiral or irregular galaxies. They are probably kept from separating by mutual gravitational attraction. The Milky Way system is near one end of the group; the great Andromeda Galaxy is near the other end, about two million light-years away.

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      in astronomy, the group of more than 20 galaxies to which the Milky Way Galaxy belongs. About half are elliptical galaxies, with the remainder being of the spiral or irregular type. As in other clusters of galaxies, members are probably kept from separating by their mutual gravitational attraction. The Milky Way system is near one end of the volume of space occupied by the Local Group, and the great Andromeda galaxy (M31) is near the other end, about 2,000,000 light-years away.

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Universalium. 2010.

Look at other dictionaries:

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