Why does the Moon change shape? This book focuses on tangible topics about space that interest young readers. Budding astronomers will get a clear understanding of our world and universe, including: Where Earth fits into the Solar System Concise details of other planets Lunar landings Phases of the Moon Extraterrestrial life and shooting stars Space shuttle, probes and much more. "About the series: " Explore Your World -- a captivating interactive series for young explorers. This new series covers a wide variety of science, nature and technology topics in an innovative and interactive way. The books make use of a profusion of engaging line drawings and colorful illustrations along with delightful pullouts, pop-ups, fold-outs, transparency overlays, reveal wheels, books-within-books and more. Each page offers a surprise for young, curious readers. Lively captions featuring non-technical explanations accompany all the illustrations.