PLANETS unlocks a free 48-page digital companion book, AMAZING SPACE MACHINES, offering even more information, photos, and videos!All children want to learn their place in the universe, discover how our planet fits into the solar system, and are blown away by the crazy, big facts and stats of space. Welcome to a tour of the major planets, moons, dwarf planets, asteroids, comets, and other rocks and gas that orbit the sun. The latest NASA and European Space Station images, many unique to this book, are combined with up-to-the-minute information from space experts across the globe, and modern graphics to entice confident and reluctant readers alike.