"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.
- Format: Paperback
- Pages: 304 pages, 25 b&w line drawings
- Publisher: Griffin Publishing
- Publication Date: 24/08/2011
- Category: Solar system: the Sun & planets
- ISBN: 9780312673352