On November 12, 2025, three gravitational-wave detectors on two continents caught a ripple in spacetime. This event did not ...

An artistic impression of the black hole jets from Mrk 501. (Emma Kun/HUN-REN Konkoly Observatory/Made with the support of AI ...

General relativity stands as one of the bedrock theories in modern physics. Its strange view of relative time and space has been confirmed by countless experimental and observational tests, from ...

Astronomers have finally found two enormous black holes at the center of a galaxy that are on the verge of a merger. The ...

A colossal “cosmic volcano” has erupted in deep space, as a supermassive black hole in galaxy J1007+3540 roars back to life ...

Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...

Learn how shifting jets in galaxy Mrk 501 exposed a pair of orbiting supermassive black holes nearing collision.

Add Yahoo as a preferred source to see more of our stories on Google. Black holes are weird. You heard it here first. And yet, if you stand back and squint a little, the task of making one is quite ...

Whenever someone talks about black holes, they almost always talk about the event horizon and the singularity. After all, that's what defines a black hole, right? Well, it depends on what you mean by ...

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.

One of the most notable aspects about our planet—if observed from the outside—is that it spins. Earth’s spin defines our days, setting the fundamental rhythm of life on our world. The moon spins, too.