Find out about the four planets farthest from the Sun: Jupiter, Saturn, Uranus, and Neptune. Discover why these planets are called the gas giants, which spacecraft have visited them, and what lies beyond them in the solar system.
The human colony on the planet Argo has always relied on the technology left behind by an alien race to thrive, but when an archaeology team accidentally activates a weapon with the power to destroy the universe, the Argo government must send a crew in search of the mythical Spider Star, also created by the alien race, to try and find a way to stop it.
Explains what the outer planets are made of, discusses how they formed, and describes the orbit, rotation, environment, makeup, moons, and rings of Jupiter, Saturn, Uranus, and Neptune, as well as the dwarf planet Pluto.
Presents an imaginary tour of the outer solar system's "gas giants" Jupiter, Saturn, Uranus, and Neptune and explores some of their major moons; includes statistics, diagrams, and information about the planets' physical properties and conditions.
