Black Holes
What's the Connection Between Stellar-Mass Black Holes and Dark Matter?
The smallest black hole we've observed might prove dark matter is made of primordial black holes.
Did Supermassive Black Holes Form Directly From Dark Matter?
Supermassive black holes are just a little bit too supermassive - astronomers have difficulty explaining how they got so big…
Cygnus X-1 was the First Black Hole Ever Found. New Measurements Show it's Much More Massive Than Previously Believed
New parallax measurements of Cygnus X-1 by the VLBA find it is more distant than we thought, and therefore more…
A Cluster of Black Holes Found Inside a Globular Cluster of Stars
Globular clusters can be home to lots of stellar-mass black holes, rather than a single intermediate mass black hole.
Black Holes Simulated in a Tank of Water Reveals “Backreaction” for the First Time
Water simulations that small gravitational waves near a black hole can significantly change the black hole's behavior.
When Galaxies Collide, Black Holes Don’t Always Get the Feast They Were Hoping for
What happens when galaxies collide? Well, if any humans are around in about a billion years, they might find out.…
In Theory, Supermassive Black Holes Could get Even More Supermassive
A new study proposes that the upper mass limit for black holes could be a million times larger than we…
Missing: Supermassive Black Hole With up to 100 BILLION Times the Mass of the Sun
The massive galaxy cluster Abell 2261 should have a supermassive black hole in its center. But it doesn't. Astronomers have…
A Galaxy is Making New Stars Faster Than its Black Hole Can Starve Them for Fuel
A monster lurks at the heart of many galaxies – even our own Milky Way. This monster possesses the mass…
Black Holes Gain new Powers When They Spin Fast Enough
Fast spinning black holes could have features different from those predicted by general relativity.