26 Aug '16, 3pm
Newly discovered 'ghost galaxy' full of dark matter is as big as the Milky Way
Knowing that the galaxy had very few stars (and thus not much light) but a mass closer to that of the Milky Way, researchers concluded that the newly discovered galaxy must be comprised mostly of dark matter . “Amazingly, the stars move at velocities that are far greater than expected for such a dim galaxy. It means that Dragonfly 44 has a huge amount of unseen mass,” said co-author Roberto Abraham of the University of Toronto. Further studies of Dragonfly 44 may help scientists finally come to an understanding of what dark matter actually is, which has eluded researchers since its existence was first suggested nearly a century ago.