Breakthrough in a Bizarre Galaxy Could Help Unlock the Mystery of Dark Matter

A faint ribbon of stars around a distant galaxy has become the first globular cluster stellar stream ever identified beyond the Milky Way. Because the stars trace the galaxy’s gravity, researchers used the stream to estimate how much invisible dark matter surrounds it and how…

The first globular cluster stellar stream found beyond the Milky Way shows that these faint structures can be used to study dark matter in other galaxies. A faint ribbon of stars stretching across a galaxy can preserve a record of how that system has evolved. Known as globular…