Milky Way has 100 million black holes: Study
US-based astronomers have found there are as many as 100 million black holes in our Milky Way galaxy. The research began after the announcement of the detection of gravitational waves, which are ripples in space-time created by black holes' collision. Further, only 0.1-1% of the black holes formed have to merge to explain the source of those ripples, researchers said.