Let your inner astronaut explore outer space with this interactive trivia book from Jeopardy! champ and New York Times bestselling author Ken Jennings.With this book about space you'll become an expert and wow your friends and teachers with out-of-this-world facts: Did you know that Mars has a volcano bigger than the state of Arizona? Or that there's a star with a diamond the size of our moon at its core? With great illustrations, cool trivia, and fun quizzes to test your knowledge, this guide will have you on your way to whiz-kid status in no time!