Astronomers know of three different categories of black holes. There are the supermassive black holes, which … “10,000 black holes missing from this star cluster … and we’ve finally found 1″

The Milky Way and Andromeda have appeared locked on a destructive course for decades. Now, … “New findings revise the Milky Way-Andromeda collision odds into a cosmic coin toss”

The evidence for dark matter is everywhere and the evidence for dark matter is nothing. … “Strange gravitational waves may reveal dark matter near merging black holes”