For years, Saturn made no sense. Measure its rotation rate using radio signals from its aurora and you get one number.

Back in the 1980s, NASA’s Voyager spacecraft made a brief flyby of Saturn’s moons, providing us with a tantalising glimpse of new worlds. Now, the Cassini mission has finished the job, providing us ...

Learn how winds in Saturn's upper atmosphere power a continuous aurora, creating misleading changes in the planet's rotation rate.