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

Planets travel alone in space, without a parent star. These wandering worlds, far from being rare, might even be extremely ...

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

Rogue planets — worlds that drift through space alone without a star — largely remain a mystery to scientists. Now, ...

Researchers have confirmed the mass of a free-floating planet thanks to a lucky convergence of ground- and space-based ...

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

Astronomers have detected a massive, lonely world drifting through the darkness without a star to call home. This ...

Using observations from both ground-based telescopes and space instruments, they were able to measure the planet's size and ...

Astronomers believe the free-floating planet is around 22 percent the mass of Jupiter and lies 3,000 parsecs from the Milky ...

On Christmas night, Jupiter will be one of the brightest objects in the sky — and a  stand-in for the mythical “Christmas ...

Jupiter, as always, is a dazzling object, shining among the stars of Gemini the Twins. It reaches opposition on Jan. 10; this ...