The document provides information about the planets in our solar system. It defines key terms like revolve, rotate, and orbit. It discusses the differences between the inner and outer planets, listing Mercury, Venus, Earth and Mars as inner planets and Jupiter, Saturn, Uranus and Neptune as outer planets. For each planet, some general facts are given about their composition, features, moons and other characteristics. The document also covers dwarf planets like Pluto, Ceres, and Eris.