Scientists had raised doubts about the discovery of a galaxy two years ago, dubbed NGC 1052-DF2, that appeared to contain no dark matter
So-called ghost galaxies aren't necessarily small but can be difficult to detect due to their very low star power
First time ever astronomers have spied galaxies in the final stages of merging together
Researchers claim to have measured more than 70 per cent of the history of the Universe
New capabilities at the W. M. Keck Observatory in Maunakea, Hawaii help astronomers discover more about the formation of the universe