Looking towards Aries, the Sloan Extension for Galactic Understanding and Exploration found something very strange.
Segue 2 is the tiniest galaxy that we know of. It has fewer stars than many star clusters do. There are only about a thousand stars in it. Even with its hundred thousand solar masses of dark matter, it's still teensie for a galaxy.
In the paper describing the discovery, one of the authors commented, “Finding a galaxy as tiny as Segue 2 is like discovering an elephant smaller than a mouse.â€