SPACE ODDITIES (ROYAL OBSERVATORY GREENWICH) (HB)

How far is a light year? Why isn't Pluto a planet anymore? What is dark energy? How much does it cost to deliver a pizza to space? Uncover the answers to some of the most puzzling questions about space in this entertaining and informative miscellany from the expert astronomers at Royal Observatory Greenwich. This pocket-sized book is packed with hundreds of amazing facts, on subjects as varied as the mysteries of antimatter to a rock on Mars called Humphrey, and everything in between.