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 ...

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 ...

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

Orbit decay accelerates as solar activity rises, with no approved mission yet to raise the telescope's altitude A newly released plot of the Hubble Space Telescope's altitude shows just how quickly ...

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

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

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 ...

Using the Hubble Space Telescope, astronomers have discovered what seems to be a galaxy that is the most heavily dominated by ...

Drawing together leading experts from across the field, an international collaboration of cosmologists has created a unified approach for measuring the value of the Hubble constant. Published in ...