New parallax measurements of Cygnus X-1 by the VLBA find it is more distant than we thought, and therefore more…
Globular clusters can be home to lots of stellar-mass black holes, rather than a single intermediate mass black hole.
Water simulations that small gravitational waves near a black hole can significantly change the black hole's behavior.
What happens when galaxies collide? Well, if any humans are around in about a billion years, they might find out.…
A new study proposes that the upper mass limit for black holes could be a million times larger than we…
The massive galaxy cluster Abell 2261 should have a supermassive black hole in its center. But it doesn't. Astronomers have…
A monster lurks at the heart of many galaxies – even our own Milky Way. This monster possesses the mass…
Fast spinning black holes could have features different from those predicted by general relativity.
We use the term 'supermassive black hole' with a kind of casual familiarity. But stop and think about what they…
The Theory of Relativity predicted the existence of black holes and neutron stars. Einstein gets the credit for the theory…