 | The Traveler''s Guide to Space: For One-Way Settlers and Round-Trip Tourists Neil F. Comins is professor of physics and astronomy at the University of Maine. His books include Discovering the Universe , tenth edition (2014), What If the Earth Had Two Moons? (2010), Heavenly Errors: Misconceptions About the Real Nature of the Universe (Columbia, 2003), and What If the Moon Didn't Exist? (1993). |
