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 ...

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.

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 ...

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty ...

The team has estimated that the planet is about 22 percent the mass of Jupiter, so roughly a Saturn-sized world. It is ...

Astronomers at the Center for Astrophysics | Harvard & Smithsonian have captured what may be the biggest planet-forming disk ...