The mystery and beauty of the Solar System has fascinated humans throughout time. The Solar System consists of the Sun, eight planets and their natural satellites, dwarf planets, asteroids, and comets. Until 2006, Pluto was classified as a planet, but is now considered a dwarf planet. Jupiter is the largest planet. In the book, The Substitute from Jupiter, Freddie, Liza, Bert, along with the rest of the class, solve the mystery of a “far out” teacher! POs: Download Order Form