Image: Hubble captures galaxy PGC 18431
Monday, June 15, 2015 - 05:30
in Astronomy & Space
There are many galaxies in the universe and although there is plenty of room, they tend to stick together. The Milky Way, for example, is part of a large gathering of more than fifty galaxies known as the Local Group. Galaxy groups like this come together to form even larger groups called clusters which can congregate further still to create mammoth superclusters.