It is a rocky moon that is partly bright and partly reddish in color.
Craters mark the surface.
Iapetus orbits at about 3,561,300 km from Saturn . Its orbital period is 79 days. It was discovered by Cassini in 1671. An ice age is a time lasting thousands of years during which the Earth is very cold and largely covered by ice and glaciers. When molten rock cools, igneous rock is formed.