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What If the Earth Had Two Moons?: And Nine…
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What If the Earth Had Two Moons?: And Nine Other Thought-Provoking…

by Neil F. Comins

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Showing 3 of 3
Very helpful as I was just making stuff up for ' Verthandi '. Answered some questions. ( )
  Baku-X | Jan 10, 2017 |
Very helpful as I was just making stuff up for ' Verthandi '. Answered some questions. ( )
  BakuDreamer | Sep 7, 2013 |
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 the Earth over time, and ultimately what’s going to happen to them. Other scenarios include the Earth as a moon, the Moon in a retrograde orbit, other planets in Earth’s orbit, Earth’s elsewhere in time, Earth’s elsewhere in the galaxy, and even what will happen to the Earth when the Milky Way and Andromeda galaxies eventually collide.

The nice thing about this for me is that he explores the science behind a variety of fantastical other Earths. In other words, he’s done much of the homework for exotic SF locales. Most of the science is well-written and aimed at the educated layman. A few bits got boring for me, but by and large it was good stuff.

However, this was not a particularly good Kindle edition. The text and diagrams themselves were decent, but the final 15% was taken up by a useless index (i.e. it had no links back into the text) and a collection of footnote/endnotes with no context back to the earlier text. Some of this may be simple limitations of the format, but I would have liked to have seen them handle it differently. If the index was going to be that useless, it should have been removed, and if there was no way to handle the footnotes more elegantly, they should have been inlined parenthetically in the text.

So, I enjoyed the book immensely, but I wish I had bought the dead-tree edition instead. ( )
  DanThompson | Apr 29, 2013 |
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Amazon.com Product Description (ISBN 0312598920, Hardcover)

“What if?” questions stimulate people to think in new ways, to refresh old ideas, and to make new discoveries. In What If the Earth Had Two Moons, Neil Comins leads us on a fascinating ten-world journey as we explore what our planet would be like under alternative astronomical conditions. In each case, the Earth would be different, often in surprising ways.

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 that won’t last forever. Eventually the moons collide, with one extra-massive moon emerging after a period during which Earth sports a Saturn-like ring.

This and nine and other speculative essays provide us with insights into the Earth as it exists today, while shedding new light on the burgeoning search for life on planets orbiting other stars. 

Appealing to adult and young adult readers alike, this book follows on the author’s previous bestseller, What If the Moon Didn’t Exist?, with completely new scenarios backed by the latest astronomical research.

(retrieved from Amazon Thu, 12 Mar 2015 18:17:46 -0400)

(see all 2 descriptions)

An astronomer and author explores ten examples of what Earth would be like if conditions in the universe were slightly altered, in a fascinating journey into scientific scenarios.

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