How do astronomers study planets, stars and galaxies? What are rovers and where have they landed? How do different telescopes work? What is a nebula? Beginner readers can find out the answers in this book, along with lots more fascinating facts.A straightforward book telling you all a beginner needs to know about the planets, stars, moons, nebulae, galaxies asteroids and more, through easy-to-read text, full-colour photographs and step-by-step visual explanations. Recommended websites accessed via Usborne Quicklinks provide further online resources.