Cassini above, sunlight below, rings in between

Cassini was above the ringplane when it took this picture - a slice of the entire ring system.

The rings are lit by sunlight from below; the light scatters through the rings' particles, but much of it bounces off their undersides and illumines Saturn's southern hemisphere. It also casts a shadow of the inner rings across the northern hemisphere - and Saturn's own shadow slices across the rings on the left side of the photo.