Finding a planet is one thing; proving it is a planet when it has no star is the part that usually breaks the story. A newly ...

Astronomers have confirmed a Saturn-size world drifting alone in deep space roughly 10,000 light-years from Earth, a discovery that turns a once-theoretical idea into a measured reality. The planet ...

Astronomers have finally weighed a wandering “rogue” planet, uncovering a Saturn-mass world flung into the galaxy after a ...

In doing so, they found this orphan is within the same weight class as Saturn, strengthening the case that the galaxy teems ...

Scientists have discovered a rogue planet roaming the Milky Way after combining observations from Earth and a space telescope ...

Most of the planets we’ve identified are in orbit around stars and formed from the disks of gas and dust that surrounded the ...

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

How far it is from the sun: 886 million miles (1.4 billion kilometers), on average How big it is: 72,400 miles (116,500 km) across, or almost 10 times the size of Earth. How many moons it has: At ...