In August 2009, the orbiting Cassini spacecraft caught sight of 20 - meter - high corrugations rippling across 1500 kilometers of Saturn's inner C ring (regular,
narrow bright bands, above), which is only about 10 meters thick.
When Cassini probed below the haze and into the troposphere, it revealed that the width of Saturn's
bands alternates with latitude:
narrower ones are darker and coincident with rapid jet streams, and the wider
bands tend to be
brighter, aligned with jets that are slower and maybe even stationary, relative to the general rotation of the planet.