You've heard of a supermassive black hole. Now, what about an "ultramassive" black hole? That descriptor is the only word researchers could use befitting a black hole recently spotted lurking far from ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. This blue horseshoe is a distant galaxy magnified and distorted by the strong gravitational pull ...

"This is amongst the top 10 most massive black holes ever discovered, and quite possibly the most massive." About 5 billion light-years away from where you're sitting, in one of the most massive ...