NOT SOLD SEPARATELY. VOYAGES THROUGH THE PLANETS, covering our solar system and planets, provides students and professors with the best of both worlds. It is written by two distinguished research scientists, David Morrison and Sidney Wolff and an award-winning astronomy educator, Andrew Fraknoi. This author team combines the latest science with classroom-tested teaching strategies. Written in a student-friendly, accessible language, VOYAGES THROUGH THE PLANETS features down-to-earth analogies, superb full-color diagrams and images, and even occasional touches of humor. Readers all around the country are turning to this book with pleasure.