One is a rocky body that orbits the sun between Mars and Jupiter. The other is made of ice, gas, and rock and travels millions of miles away from the sun before returning years later. Which one is an asteroid, and which one is a comet? Inside this informative space guide, readers will learn all about both asteroids and comets by comparing and contrasting them in several different ways. Other topics include the solar system and meteors. Manageable text, dazzling photographs, and helpful diagrams make this an out-of-this-world reading experience.