Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.

Experience the terrifying and mind-altering journey of falling into the gravitational abyss of a black hole.

Some of this glowing matter envelops the black hole in a whirling region called an accretion disk. Even the matter that starts falling into a black hole isn't necessarily there to stay.

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time ...

This artist’s impression illustrates the mechanism that could be at the origin of the powerful bursts of X-ray light seen from a newly awakened black hole named Ansky. ESA; ACKNOWLEDGEMENTS ...

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

In a study published in the fall of 2019, theoretical physicists Jakub Scholtz and James Unwin proposed it could actually be a black hole. Not just any black hole, but a primordial black hole.

Black holes are fundamental to the structure of galaxies ... circular orbit (ISCO), the closest that matter can orbit without falling in. The researchers observed that initially the inner radius ...

The idea was ridiculed at first, but other scientists calculated that the star continues forever to fall inward toward its center—thus creating what we called a black hole. Black holes can grow more ...