DAVID A. HARDY / SCIENCE PHOTO LIBRARY DAVID A. HARDY / SCIENCE PHOTO LIBRARY
The Local Group of galaxies. Artwork showing some of the members forming the Local Group, the cluster of galaxies to which the Milky Way belongs. It is a fairly small cluster with a diameter of about 3 million light years and comprising about 25 galaxies. The cluster is dominated by three spiral galaxies: the Milky Way (lower centre right), the Andromeda Galaxy (M31, top left) and M33 in the constellation of Triangulum (not shown here). Other members include the Fornax System (below and to the left of the Milky Way) and IC 1613 (bottom left), an irregular galaxy at a distance of 2.5 million light years from the Earth.
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