Tracking the rotation speed of solid planets, like the Earth and Mars, is a relatively simple task: Just measure the time it takes for a surface feature to roll into view again. But giant gas planets ...

Somewhere deep below Saturn s cloud tops, the planet rotates at a constant speed. Determining this interior period of rotation has proven extremely complicated. Now, with new Cassini results, a team ...

Astronomers have discovered 128 never-before-seen moons orbiting Saturn — giving it almost twice as many moons as all the other planets in the solar system combined. The findings have further ...