Ian Ridpath is an amateur astronomer and an author and broadcaster on astronomy and space.Wil Tirion is an amateur astronomer and graphic artist who designed the first ever star atlas in 1981. Together Ian and Wil have also produced Collins Pocket Guide Stars and Planets and Collins Gem Stars. Rachel Federman is the author of GIRL DRINKS: 101 COCKTAILS FOR EVERY OCCASION and TEST YOUR DOG: THE DOG IQ TEST. She is the lead singer and bassist for her band, Dimestore Scenario. She lives in Brooklyn, NY.