To the extent that we can see them, galaxies in the very early universe should look relatively young and unformed. But galaxy ALESS 073.1 is a surprise to astronomers: it looks more mature than we'd have any reason to expect. Why?

Particles carried from Earth's poles via our planet's magnetosphere could be interacting with lunar rocks to create small quantities of water on the moon.

New research suggests that the famous black hole Cygnus X-1 - first black hole ever detected and one of the closest to Earth - is farther away and much more massive than previously believed.

A new atlas of nearby binary stars plots more than a million pairs and reveals a profusion of identical twins.

Check out this amazing new video from NASA's Perseverance rover, showing its own descent and landing on the surface of Mars last week. Truly, it's like nothing seen before! Also, the first-ever audio from Mars ...

To find alien life in our universe, scientists have considered searches for optical lasers or even giant energy-harvesting structures known as Dyson spheres. Now they're suggesting a more mundane sort of search, a hunt for air pollution in exoplanet atmospheres.

For the first time, astronomers have detected the presence of a throng of black holes crowding near the center of an ancient globular cluster.

NASA's Perseverance mission conducted a picture-perfect landing on Mars today and has already sent back several images.

Researchers at the SETI Institute say that mysterious dark streaks on sun-facing slopes on Mars, debated about for years, may be small landslides caused by a combination of salts and melting ice just below the surface.

Astronomers have confirmed that an object with the nickname of Farfarout is, to date, the farthest object we’ve seen in the solar system.