The most reflective body in the Solar System is Enceladus, a small moon of Saturn. It reflects some 90% of the sunlight that illuminates it, making it more reflective than freshly-fallen snow.

Enceladus’ surface is composed of icy material, and its lack of craters, relative to other Saturnian moons suggests that geological activity, such as cryovolcanism, has occurred within the last few hundred million years, and possibly occurs still today. Enceladus as a diameter of 498 km (309 miles).