In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

Astronomers are applying new image-processing techniques to previously released Hubble observations in honor of the space ...

Astronomers have tracked a mysterious magnetar, SGR 0501+4516, across the Milky Way, revealing it may not have formed in a ...

The discovery was made on a massive exoplanet known as K2-18b that for years has captivated scientists searching for life ...

New JWST data strengthens earlier hints that K2-18b, a possible water world 120 light-years away, could host the chemical ...

Slushy hailstones of ammonia and water were part of a bizarre theory to explain the planet's poorly mixed atmosphere. These mushballs seem to be real, say UC Berkeley scientists.

A decade of observations cast doubt on the typical magnetar origin story, at least as it relates to SGR 0501+4516.

The dream of finding life on an alien Earth-like world is hampered by a number of technical challenges. Not the least of ...

"Magnetar birth rates and formation scenarios are among the most pressing questions in high-energy astrophysics." ...

The image was published as part of the 35th anniversary celebrations of the NASA/ESA Hubble Space Telescope, which was ...

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

Astronomers have detected molecules on exoplanet K2-18b that may have been produced by simple organisms, claiming it's the strongest evidence yet of life off Earth.