What would really happen to Earth if we put the universe's most massive black hole on our stellar doorstep as a viral graphic imagines?

New observations of the center of our galaxy have, for the first time, revealed hotspots in the disk of chaotic gas orbiting our Milky Way's supermassive black hole.

Tracking the speed of an event horizon can tell us what a black hole ate, give us a clue as to how it was formed, and whether it survived a major collision.

How big are some supermassive black holes? Just trying to scale them down to numbers we can wrap our minds around is a challenge in and of itself.

While we still don't know how supermassive black holes get as heavy and large as they are, but we have a few ideas...

Astronomers are trying to zero in on the largest mass for a stellar black hole and found a monster larger and hungrier than they expected.

Astronomers weigh a black hole so massive, it wasn't born from an imploding star but from massive nebulae crushed by its own gravity.