Look: Ghostly, mysterious galaxies help unlock the secrets of dark matter

xponentialdesign via Giphy

You’re probably used to the stunning images of our bright, densely-packed galaxy, the Milky Way.

NASA, ESA, and P. van Dokkum (Yale University)

But another type of galaxy, called an ultradiffuse galaxy (UDG) is the antithesis of the populated cluster we call home.