This book explains how our Solar System works. Young readers will learn many interesting facts about Space, understand the differences between planets, what satellites, comets, and asteroids are, and get acquainted with the most successful scientific missions - from the first human spaceflight to sending research probes to other planets. The books in this series feature only the most up-to-date information and the most modern illustrations! And that's not all: at the end of each book, there are engaging tasks and games that will help readers have fun while reviewing what they have learned.