With its unmatched entourage of rings and moons, Saturn is no stranger to bravado. Roughly every 29 years—the time it takes Saturn to circle the sun—the ringed planet spits out an absolute doozy of a ...

Astronomers have spotted a lonely world roughly the size and mass of Saturn, drifting through the Milky Way without a star to orbit. The discovery turns a once theoretical curiosity into a concrete ...