An curved arrow pointing right. Astronomers have discovered a supermassive black hole that they cannot explain. Not only is it massive, but it resides in a relatively quiet corner of outer space.

Narrator: Black holes are some of the most powerful and violent objects in the universe. They can warp space and time and ... that there is a planet in the outer solar system, this would be ...

Around these black holes—a term popularized in the 1960s by the American physicist John Wheeler—space-time as we know it breaks down. A black hole devours material from its galaxy, and a ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time literally ... First, the outer boundary of these cosmic titans is a one ...

One creative Pokemon fan puts a space-themed twist on Bulbasaur, making new designs based on things like black holes and more.

rightarrow{neutron~star,~or~a~black~hole~(depending~on~size)}\) After the main sequence period, they expand and become red super giants. This is followed by an explosion in which the outer layers ...