Planets guides beginning readers on a journey of exploration through the solar system, showing how planets were formed, their attraction to stars, moons, and satellites, and how we humans explore our space neighborhood--the Milky Way galaxy--and beyond. A companion digital book poses evidence-based questions through fun Q&A, matching games, writing activities, and vocabulary "slams" that test the reader's comprehension. --

Describes comets, asteroids, and meteoroids, and how they impact Earth. Includes activity.