Pluto has not been a planet since 2006. But this tiny world still inspires people of all ages while sparking controversy.In this delightfully witty book, astronomer Dean Regas teaches you how to educate your grown-up about the cutting-edge science of space, most crucially the reason why Pluto is NOT a planet any more.Delving into the history of space discoveries, the key players who have helped our understanding of the universe (including the 11-year-old girl who named Pluto in the first place) and the ever-changing nature of science, this book will equip every reader with the tools they need to bring their grown-ups fully up to speed, and to sneak in as many amazing astronomical facts as possible. And there’s a handy quiz at the end so that you can check your grown-up has been paying attention!