All That Matters about astronomy. All That Matters books are a fast way to get right to the heart of key issues.

With a blend of exciting discoveries and important scientific theory, this innovative and readable introduction to astronomy is ideal for anyone who wants to understand what we know about the universe, and how we know it. Each chapter starts with details of a method of jow astronomers over time have observed the world, and then uses this as a springboard to discuss what they discovered, and why this was important for understanding the cosmos. The last chapter, on dark matter, also focuses on the many things we don't yet know - reminding us that astronomy, like this book, is a fast-paced and fascinating subject.