A newly discovered exoplanet is rewriting the rules of what planets can be. Orbiting a city-sized neutron star, this ...

Astronomers just measured the mass of a free-floating planet without a star for the first time ...

Gaia data reveals signs of planets forming around young stars by measuring stellar motion, identifying planetary, brown dwarf, and stellar companions in early star systems ...

T Cha is no ordinary young, Sun-like star. It is surrounded by a circumstellar disk, the dense, rotating structure of gas and ...

Quite far beyond the Milky Way is a lone planet that astronomers found new information about. For the first time, scientists ...

So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

Scientists measure a Saturn-sized rogue planet drifting through the Milky Way using rare Earth and space observations, revealing how planets can be ejected from their original systems.

By tracking tiny stellar wobbles, astronomers have detected planets forming around young stars for the first time.

Astronomers have finally pinned down the mass and distance of a lonely world that drifts through the galaxy without a parent ...

While surveying distant worlds beyond our solar system, researchers unexpectedly obtained the first direct images showing ...

Astronomers have spotted a lonely world roughly the size and mass of Saturn, drifting through the Milky Way without a star to ...

A strange world just 47 light-years from Earth is rewriting what scientists thought they knew about alien planets. Hidden ...