"This is truly extraordinary," Itai Sfaradi of the University of California, Berkeley, said in a statement. "Never before ...

As the collapsed core of a massive star, a neutron star is a small but incredibly dense object, packing up to three times the ...

Neutron stars pack extreme mass into tiny volumes. Scientists explore how compact they can become before collapsing into ...

Small and unassuming, Segue 1 is a nearby dwarf galaxy containing only a handful of stars—too few to provide the gravity ...

The concept of two black holes orbiting one another has been theorized for many years, but recent satellite photography may ...

How astronomers used gravitational lensing, a space-time trick predicted by Einstein, to detect a black hole measuring 30 ...

Event Horizon Telescope data reveal the magnetic field around M87* shifted, weakened and then flipped, defying theoretical expectations.

Astronomers have reported a colossal find in a famous warped ring of light. Inside the galaxy that forms the Cosmic Horseshoe, researchers measured a black hole weighing 36 billion suns. The inner ...

When space telescopes blazed with high-energy radiation for hours earlier this year, astronomers suspected that they were ...

When galaxies collide, it's not a gentle affair, but it does take millions of years. Over this time, the two massive star ...

In a recent piece for my column The Universe, I wrote about the biggest black holes in the cosmos. These can tip the scales at many billions of times the sun’s mass, outweighing even entire galaxies.