The process demonstrated by "Cratering" occurs throughout the solar system. Most of the solid planets, and their moons, possess impact craters. This picture shows the crater-peppered surfaces of the planet Mercury (left) and the Earth's Moon (top right), compared to the very similar, but much smaller-scale cratering of the Planetary Landscapes artwork (lower right).

Left: The planet Mercury (photo credit: NASA)   Upper right: The Earth's Moon (photo credit NASA)   Lower right: The artwork "Cratering."

How It Works:  In "Cratering," visitors drop small clumps of fine powder into a tub containing the same substance, creating fields of craters of a range of sizes and overlapping patterns.