Making Waves and Shadows

Credit: NASA/JPL/Space Science Institute
Image source

Here's something you'll only see once in a Saturnian equinox. We already know that Saturn's moons play a big part in maintaining its rings - both adding material to them and 'shepherding' their edges. But here we can see the ripples that tiny (8km) moon Daphnis creates are themselves casting shadows onto the rest of the rings.

Daphnis' waves apparently have a vertical component of around a kilometer in height.