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Reddit mentions of What If the Earth Had Two Moons?: And Nine Other Thought-Provoking Speculations on the Solar System
Sentiment score: 1
Reddit mentions: 4
We found 4 Reddit mentions of What If the Earth Had Two Moons?: And Nine Other Thought-Provoking Speculations on the Solar System. Here are the top ones.
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Another way of saying xORioN63's part B is that the earth's rotation (around its axis) and revolution (around the sun) period would both equal one year, just as the moon's rotation and revolution around the earth both equal one month, which leads to the same side of the moon always facing the earth (because it's tidally locked).
In any event, very hot on the sun-facing side, and very cold on the dark side, with a narrow temperate shadow band round the earth between these two fire-and-ice worlds. The sun would always be on the horizon and it would always look like sunset/sunrise, but the sun wouldn't move.
This description is idealized however. I don't know if climatologists have modeled what would happen to the earth's atmosphere. For instance, if the oceans boiled off the hot side and froze on the dark side, then there might be no atmosphere on the planet, making the temperate band uninhabitable. Liquid water presumably could exist there, though it's hard to imagine that on a planet with no atmosphere. (Would it boil off due to the vacuum?)
In Neil Comins' "What If the Moon Didn't Exist?: Voyages to Earths That Might Have Been," the author describes several what-if alternate Earths, including one related to your question (but not the same), an earth whose axis points at the sun (like Uranus). Such an earth could still have a 24-hour day but the same side would always point toward the sun. Unfortunately, I don't remember his other conclusions about the planet, as I read this book many years ago. It was very good though.
Comins also wrote a sequel, "What If the Earth Had Two Moons?: And Nine Other Thought-Provoking Speculations on the Solar System" in 2010.
What if the Earth had Two Moons?
There ya go!
You should read these two books that hypothesize about these types of situations. I found them very enjoyable:
http://www.amazon.com/What-Earth-Had-Moons-Thought-Provoking/dp/0312598920
http://www.amazon.com/What-If-Moon-Didnt-Exist/dp/0060925566/ref=ntt_at_ep_dpt_5