a group of stars or galaxies bright and compact a small, dense region of stars or galaxies bright points of light arranged in a pattern a bright center with a halo of fainter stars or galaxies
cluster which is a group of stars or galaxies cluster which has bright and compact cluster which is a small, dense region of stars or galaxies cluster which has bright points of light arranged in a pattern cluster which is a bright center with a halo of fainter stars or galaxies