Scientists just found a 'ghost galaxy'

Scientists have found a ''ghost'' galaxy roughly the same mass as our own, but entirely made up dark matter.  Dragonfly 44 is most entirely made up of dark matter, the mysterious -and for now mostly theoretical stuff that makes up 27 per cent of the universe but has never actually been seen. 

Though the galaxy is relatively nearby, at least in the scale of the universe , it is so dark that scientists completely missed it for decades.  But it was finally spotted last year. It sits in the coma galaxy cluster, about 330 million light from us. when scientist looked at it further, they found that it was not just  normal set of stars-but instead a ghost ,made up of dark matter.
   

photo: google images