Terence Dickinson is the author of the best-selling guidebook NightWatch and 13 other books, among them The Universe and Beyond, Splendors of the Universe, Summer Stargazing and Exploring the Night Sky. He is also editor of the Canadian astronomy magazine SkyNews and is an astronomy commentator for Discovery Channel Canada.
Alan Dyer is program producer at the Calgary Science Centre Planetarium and a contributing editor to Sky & Telescope magazine. He is widely regarded as an authority on commercial telescopes, and his evaluations of astronomical equipment appear regularly in major North American astronomy magazines.