Then there was the September discovery of C/2025 R2 (SWAN), a comet so bright that even when it was near the moon on ...

The Atacama Cosmology Telescope in Chile not only confirmed one of the greatest mysteries in the universe—it also ruled out ...

Observations of the formation of light-nuclei from high-energy collisions may help in the hunt for dark matter.

Beyond its monumental walls, Sacsayhuaman contains a network of springs and channels that hint at a sacred water-focused ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

“Our latest discovery helps solve a 20-year cosmic mystery,” co-lead author Daniel Whalen from the University of Portsmouth's ...

Astronomers have employed NASA's Chandra spacecraft to perform X-ray observations of a massive galaxy cluster known as SPT-CL ...

The James Webb Space Telescope has found compelling evidence for "monster stars" — gigantic, primordial stars that existed in the early universe.

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...

"It means cleaning house, narrowing the viable paths forward, and no longer spending energy on what are evidently dead ends." ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Dark matter is special in that it doesn't emit, absorb or interact with light, so science had to find a more creative way to ...