One of the most powerful objects in the universe is a radio quasar—a spinning black hole spraying out highly energetic ...

Whether a galactic environment has the right conditions for habitable planets to form could depend on how the black hole in ...

You can imagine the black hole as a rotating sphere, and the accretion disk as a disk with a hole in the center. The black hole sits in that center hole and rotates one way, while the accretion ...