Scientists say it's possible to use tiny ripples in space and time, or gravitational waves, to measure the rate at which our ...

For years now, NASA’s Hubble Space Telescope has had its fair share of brushes with death. The groundbreaking observatory launched into low-Earth orbit 36 years ago, and it’s ...

A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is ...

A stunning new Hubble image reveals the most detailed look yet at the Egg Nebula, the youngest and closest pre-planetary ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...

It's 99 percent dark matter, a new study explains.

In the vast tapestry of the universe, most galaxies shine brightly across cosmic time and space. Yet a rare class of galaxies ...

Comet 41P slowed its rotation to a halt and then began spinning in the opposite direction, surprising scientists.

Astronomers used AI to search 35 years of Hubble data and discovered over 1,300 rare cosmic anomalies hidden in plain sight.

“The Euclid data clearly confirm the presence of the extremely faint, diffuse light of CDG-2, revealing the galaxy behind the ...

Astronomers have confirmed the first isolated stellar-mass black hole drifting through the Milky Way, located roughly 5,000 ...