John Lithgow narrates this journey to the moons of the planets in the Earth's solar system.Computer animation allows the viewer to see these "worlds" as scientists envision them. A visit to Triton, Neptune's moon, shows geysers and volcanoes that are driven by liquefied nitrogen and ice. Jupiter's moon Io, pulled and compressed by incredible gravitational forces, features the biggest volcano in the solar system---generating more heat than all of Earth's volcanoes combined. Some fanciful lunar sports are proposed as well, including snowboarding on Saturn's moon, Enceladus, and scuba diving on Jupiter's Europa, where an underground ocean exists. ~ Rick Toy, Rovi