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 ...

Sometime in their cosmic lives, two gigantic black holes crashed into one another to form something even more monstrous: A black hole equal to the size of 240 of Earth's sun. Now, thanks to an ...

In this instance, two enormous black holes – 100 and 140 times the mass of Earth's sun – collided. The result? A black hole the size of a whopping 240 suns. Black holes this massive shouldn't be ...