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Local Group
noun
, Astronomy.
- the group of galaxies, at least 25 of which are known, that includes the Milky Way.
Local Group
noun
- astronomy the cluster of galaxies to which our galaxy and the Andromeda Galaxy belong
Local Group
- A group of more than 30 galaxies that includes 2 large spiral galaxies—the Milky Way and Andromeda—as well as numerous smaller galaxies, many of which are dwarfs. The Local Group has a diameter of approximately 10 million light-years, with its gravitational center located between our galaxy and the Andromeda galaxy. It is part of a larger grouping known as the Virgo supercluster.
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Word History and Origins
Origin of Local Group1
First recorded in 1915–20
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