The Saturn-sized celestial object is one of the clearest examples yet of a planet drifting through space without a host star.

While most planets that we are familiar with stick relatively close to their host star in a predictable orbit, some planets ...

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

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

This is the provocative question at the heart of an emerging astronomical debate, wherein the discovery of rogue ...

The James Webb Space Telescope detected an atmosphere on a lava-covered exoplanet, evidence that small planets close to stars ...

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

A NEWLY discovered rogue planet without a host star like the sun to orbit around has been detected dashing through space on ...

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

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

The upcoming year will offer a blood-red moon, spectacular meteor showers and the first glimpse of the sun’s corona since ...

Forbes contributors publish independent expert analyses and insights. Leslie Katz covers the intersection of culture, science and tech. A yellowish-orange glow bathes Phainoterra, a planet of dramatic ...