The Smallest Galaxy in the Universe Is AdorableAdam Clark Estes6/10/13 5:34pm19EditPromoteDismissUndismissHideGo to permalinkFew scientific terms express a sense of sheer enormity more than the word "galaxy." Galaxies are massively massive. They're filled with more stars than any single person could count. They're billions of times brighter than our own Sun! Galaxies are huge! Except for Segue 2.