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 ...

A group of astronomers has discovered the smallest, dimmest satellite galaxy bordering the Milky Way’s nearest galactic neighbor, the Andromeda Galaxy. The itsy-bitsy satellite galaxy is named ...

"We thought they were basically all going to be fried because the entire universe turned into a vat of boiling oil." Astronomers have discovered a collection of tiny galaxies located roughly 3 million ...