Superionic water—the hot, black and strangely conductive form of ice that exists in the center of distant planets—was ...

For the first time, astronomers have directly measured the mass of a rogue planet, a celestial body wandering through space ...

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty ...

Planets usually stay close to their host stars, tracing steady paths shaped by gravity. Yet some planets break free and drift ...