An introduction to the planet Neptune that provides information on its location in the solar system, size, orbit, temperature, atmosphere, surface, rings, and moons, and discusses how it is studied by astronomers.
Describes the outer planets of the solar system and details their physical features, their environmental characteristics, and the history of exploration of each planet.
Presents facts about the large, gaseous planet, from its discovery to the latest findings from the Voyager II space probe which passed by Neptune in 1986.
Describes the interiors, surfaces, rings, and moons of Uranus and Neptune; the discovery of Pluto and the Kuiper belt; what is known about Pluto's interior and surface; and also discusses Charon and the Oort cloud.