Blast Off on a Learning Odyssey with Six Photo-Filled Books About Our Solar System Simple words and breathtaking images help build young readers' knowledge of astronomy. These photo-filled books take young astronomers on a learning trip into space. They'll discover the wonders of our solar system, see how Earth revolves around the sun, visit the moon, and learn about asteroids and comets. Each book includes simply written but captivating facts designed to provide children with a strong science foundation and introduce essential science vocabulary. This one deals with moons.