Several sinuous valleys, some of which appear to branch, are visible on Dione's surface. Both Dione and Rhea have bright, wispy streaks on their already highly reflective surfaces, perhaps caused by ice thrown out of craters by meteorite impacts. Of the five inner moons, Enceladus appears the smoothest, but we will have to wait for Voyager 2 to photograph the satellite at greater resolution in 1981. The haze layers merge into a darkened hood over the north pole. At the poles, liquid nitrogen lakes may form.
Titan has no appreciable magnetic field and therefore possesses no large liquid conducting core.
It does, however, supply a small amount of charged particles to Saturn's magnetosphere. The southern hemisphere is somewhat brighter than the northern, perhaps as a result of seasonal effects. Hyperion and Iapetus are most likely composed of water ice, although their masses and densities are uncertain. Iapetus has one bright and one dark hemisphere. The dark side, which faces forward as lapetus circles Saturn, reflects about one-fifth as much light as the trailing, bright side.