WASHINGTON - Just as Earth orbits the sun, most planets discovered beyond our solar system orbit a host star. But some are out there all by themselves, called rogue planets. While their origins are ...

A young alien planet, wandering alone in the galaxy, has surprised astronomers by gobbling up gas and dust at a rate faster than they've ever seen before. Throughout the Milky Way, there are ...

Scientists have spotted a “rogue” planet floating on its own through space. Most of the planets we know are found orbiting as part of a star system, with one or more suns, just like our Earth and the ...

Roaming the galaxy, alone and untethered, is a mysterious group of free-floating - or rogue - planets. Because of their elusive nature, little is known about their properties or formation. Now, with ...