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.
In 2016, researchers discovered a UDG called Dragonfly 44 that was 99 percent dark matter.
Writing on September 6 in the journal Nature Astronomy, an international team of researchers used simulated UDGs to shed light on how they come to exist.
NASA, ESA, and P. van Dokkum (Yale University)
The study authors say that some UDGs likely orbited larger systems at one point, but spent the bulk of their time in isolation.