Axions are hypothetical light particles that could solve two different physics problems, as they could explain why some ...

For about 50 years, the scientific community has been grappling with a substantial problem: There isn’t enough visible matter in the universe.Related video above: Space junk crashed through family's ...

Dark matter, the most mysterious "stuff" in the universe, may be a sort of cosmic matchmaker, allowing supermassive black holes to overcome a final hurdle before colliding and merging into one.

Researchers have found a link between some of the largest and smallest objects in the cosmos: supermassive black holes and dark matter particles. Their new calculations reveal that pairs of ...

Hints of impossibly bright, massive objects in the infant universe have forced astronomers to rethink how the first cosmic ...

The "final parsec problem" describes the difficulty in explaining how supermassive black holes lose sufficient orbital energy to merge when separated by distances around one parsec, where ...

At the center of our galaxy, there's a mysterious, diffuse glow given off by gamma rays — powerful radiation usually emitted by high-energy objects such as rapidly rotating or exploding stars.NASA's ...

Physics has a bit of a messy problem: There's matter missing in our universe. Something is there that we can't see, but scientists can detect. "When we look at how stars move in galaxies, they move as ...

A professor at the University of Cincinnati and his colleagues have figured out something two of America's most famous fictional physicists couldn't: how to theoretically produce subatomic particles ...