Carole Stott has 20 years of experience as an astronomer, and has served as the curator of astronomy and the head of the observatory for the Royal Observatory in England. She is the author of Eyewitness: Space Exploration, Eye Wonder: Space, I Wonder Why Stars Twinkle, and Celestial Charts: Antique Maps of the Heavens.Giles Sparrow studied astronomy at University College London and science communication at Imperial College, London, and is a bestselling science and astronomy author. His books include Cosmos, Spaceflight, The Universe in 100 Key Discoveries, and Physics in Minutes, as well as contributions to DK books, such as Universe and Space.