Astronomers have detected a rogue planet roughly the size of Saturn wandering alone through the Milky Way. Unlike most planets, it does not orbit a star but drifts through space on its own. This ...

Scientists now have direct evidence that a planet — not just failed stars — can rove the galaxy after a violent expulsion from its orbit. Credit: NASA / JPL-Caltech / R. Hurt illustration Astronomers ...

Somewhere between the stars, far from any sun, a planet is moving quietly through space. There is no orbit to trace and no glow to catch the eye, just a brief distortion when it passes in front of ...