What If the Earth Had Two Moons?

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St. Martin's Press, Aug 2, 2011 - Science - 304 pages
20 Reviews
“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.

Appealing to adult and young adult alike, this book is a fascinating journey through physics and astronomy, and follows on the author’s previous bestseller, What if the Moon Didn’t Exist?, with completely new scenarios backed by the latest astronomical research.

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LibraryThing Review

User Review  - DanThompson - LibraryThing

This is a collection of ten what-if scenarios for alternate earths in various solar systems. It includes the title scenario of Earth having two moons, how we would have gotten them, their effects on ... Read full review

Review: What If the Earth Had Two Moons?: And Nine Other Thought-Provoking Speculations on the Solar System

User Review  - David - Goodreads

It takes a bit of work to take such riveting questions and fascinating science and turn it into one of the most boring non-fiction reads I've experienced in a while, but Neil Comins manages to pull it ... Read full review

About the author (2011)

NEIL F. COMINS is a professor of physics and astronomy at the University of Maine and author of popular scientific books, articles and textbooks.

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