"What if?" questions have always stimulated people to think in new ways. "What if the Earth Had Two Moons" leads us on a fascinating 10 world journey exploring what the Earth would be like if conditions in the universe were slightly different. The answer: Earth would be different, often in ways that would surprise us. The title chapter, for example, gives us a second moon orbiting closer to Earth than the one we have now. The night sky is a lot brighter, but not forever. Eventually the moons collide, with one more - massive moon emerging after a period during which Earth has a Saturn-like ring. The scenarios also shed new light on the burgeoning search for life on planets orbiting other stars.
- ISBN13 9780312673352
- Publish Date 2 August 2011 (first published 30 March 2010)
- Publish Status Active
- Out of Print 4 April 2022
- Publish Country US
- Imprint Saint Martin's Griffin,U.S.
- Format Paperback
- Pages 304
- Language English