Astronomers Think They’ve Spotted a Galaxy That’s 99.9% Dark Matter
Astronomers have spotted a galaxy they believe is made of 99.9% dark matter, reports CNN — and it’s so faint, it’s almost invisible:

CDG-2, which is about 300 million light-years from Earth, appears to be so rich in dark matter that it could belong to a hypothesized subset of low surface brightness galaxies called “dark galaxies,” which are … ⌘ Read more