Cosmology

Rock core samples may carry marks made by cosmic rays up to billions of years old.

Theoretical astrophysicists predict that a glowing halo just outside the event horizon should surround all black holes.

Some scientists have been poking at the foundations of dark energy, but many say the concept remains on solid, if mysterious, ground.

Astrophysicists devised a new theory that may explain the formation of black holes with masses exceeding 50 times that of our own sun.

The new laureates discovered the first planet orbiting a solar-type star and improved our understanding of how the universe evolved.

A new paper proposes two experiments to test if the steadiest components in physics are really kind of shifty after all.

We have now seen what we thought was unseeable, team says.

Evidence of dark matter particles may be easier to find in ancient minerals than in the newest detectors.

Researchers calculate all the photons ever emitted by the observable universe and find an astronomical number.

Theoretical physicists come up with a new way to analyze the firework of signals coming from particle collision experiments.

Physicists come up with alternate explanation of gravity that may implicate dark energy, which comprises 70 percent of our universe.

Physicists speculate that decaying neutrons may be producing particles unknown to science that make up the elusive dark matter.