Astronomers have probed the physical environment of repeating X-ray outbursts near monster black holes thanks to data from NASA's NICER (Neutron star Interior Composition Explorer) and other missions.

Ever since general relativity pointed to the existence of black holes, the scientific community has been wary of one peculiar ...

The biggest challenge in theoretical physics for more than a century has been to develop a unified theory that combines ...

There’s a new class of cosmic object in town. And it might just overturn our understanding of black holes and galaxy ...

A regular black hole would have the light ring and the outer horizon, but also an inner horizon, which would enclose a core ...

The gravity quantum field is calculated in flat spacetime. The curved classical metric is calculated using the expectation ...

Ever since general relativity pointed to the existence of black holes, the scientific community has been wary of one peculiar ...

NASA compares the universe's biggest black holes with "each other and to our solar system," in this Goddard Space Flight ...

NGC 4945, a beautiful spiral galaxy over 12 million light-years away, hides a ferocious secret: a ravenous black hole at its ...

Black holes are known for their voracious appetites, consuming everything — even light — that falls inside them with no hope ...

More than half of Fermi’s discoveries have been blazars, a specific type of AGN whose jets of particles are pointed almost ...

Dr. Piro will describe some of the best theories to explain black hole “heartbeats” and what they can teach us about these ...