A Son of the Rock

This was Astronomy Picture of the Day on Monday (26/12/11.)

The storm apparently has 18 times the surface area of the Earth. It’s one of the longest lasting storms ever recorded. (It can’t match Jupiter’s Great Red Spot, though.)

I like the way Saturn’s rings show up here as a thin blue line right across the middle of the photo. Their shadows are impressive too. There also seems to be the shadow of a moon on the lower left.