Black Holes

What Happens to Their Supermassive Black Holes When Galaxies Collide?

What’s better than two gigantic galaxies swirling into one another until they collide?  How about three galaxies swirling into one…

4 years ago

Hubble Sees Dark Shadows That Could Be Cast by a Supermassive Black Hole

We use the term 'supermassive black hole' with a kind of casual familiarity. But stop and think about what they…

4 years ago

Merging Black Holes and Neutron Stars. All the Gravitational Wave Events Seen So Far in One Picture

The Theory of Relativity predicted the existence of black holes and neutron stars. Einstein gets the credit for the theory…

4 years ago

Beyond “Fermi’s Paradox” XI: What is the Transcension Hypothesis

Could it be that the reason we haven't heard from any aliens is because they transcended and aren't interested in…

4 years ago

Behold! The Black Hole Collision Calculator!

A new tool called the Black Hole Collision Calculator let's users see just how powerful a collision between a black…

4 years ago

A ring of high-energy particles surrounding a black hole suddenly disappeared

In March 2018 astronomers watched a massive black hole surge in brightness. Then over the following year, its ring of…

4 years ago

What Shuts Down a Galaxy’s Star Formation?

A new study finds that while black holes drive the formation of galaxies, they are also what kills them in…

4 years ago

Astronomers Might Have Seen a Star Just Disappear. Turning Straight to a Black Hole Without a Supernova

A brilliant blue star has disappeared from view, which could mean it became a black hole in a novel way.

4 years ago

How an Advanced Civilization Could Exploit a Black Hole for Nearly Limitless Energy

A black hole as a source of energy? We know black holes as powerful singularities, regions in space time where…

4 years ago

New Simulations Show How Black Holes Grow, Through Mergers and Accretion

One of the most pressing questions in astronomy concerns black holes. We know that massive stars that explode as supernovae…

5 years ago