Local Group


noun Astronomy.

the group of galaxies, at least 25 of which are known, that includes the Milky Way.

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Origin of Local Group

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for Local Group

Local Group

noun

astronomy the cluster of galaxies to which our galaxy and the Andromeda Galaxy belong
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for Local Group

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.