Barnard’s Star hosts four hostile small planets whose unusual chemistry and orbital rhythm reveal how compact planetary systems can form and survive.

For ages, astronomers have categorized the skies into tidy buckets: stars, planets, and moons. However, a new object 71 light years from us could completely disrupt that thinking.

Most asteroids drifting through our solar system are made of rock or ice, but one stands out as strikingly different. Known as Psyche, or 16 Psyche, this metal-rich asteroid orbits the Sun between ...

A new study found a four-carbon sugar named “erythrulose” in a molecular cloud in the interstellar medium (ISM) roughly ...

Astronomers directly imaged a Jupiter-mass object orbiting a brown dwarf 72 light-years away, making it the strongest candidate yet for the first known exomoon.

A giant planet had been hiding inside one of astronomy’s most closely studied planetary systems, concealed by a bright disk of cosmic dust. Webb revealed Beta Pictoris d through atmospheric traces of ...

A newly discovered object in a distant solar system doesn’t fit neatly into the current definitions of moon or planet.

Our solar system is home to a whopping 891 moons, but the rest of the known cosmos? Nothing. Until now.  As a new paper in ...

The object about 72 light-years away from Earth could be the first satellite discovered outside our solar system.

Silver makes up only a minute fraction of the Sun, but its abundance carries clues about events that shaped the Milky Way.

A rocky exoplanet 48 light-years from Earth has offered the 'strongest evidence yet' that other planets besides Earth could ...

Astronomers discovered a moon-like object orbiting a brown dwarf that's orbiting a star. Say that three times fast.