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In lugnet.technic.bionicle, Philippe Hurbain wrote:
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And on the opposite side two... (there are 2 tides per day on earth!)
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Less than you might think. The reason why there’s an obverse lunar tide is
because the moon is small and doesn’t exert enough gravitic force on the far
side of earth to pull all the water around to the near side. The side closest
to the moon gets a swell of water, the ring around the middle gets drained, and
the far side basically stays near the “at rest” level. The sun is a lot bigger,
but so far away that it basically just tweaks the tidal levels a bit.
If the moon had liquid bodies of water like Earth does, the gravity exerted by
Earth would be massive compared to the lunar pull, so it’s entirely possible
that the water would be pulled around from the entire back surface of the moon
(it probably wouldn’t be completely drained, but it might be really, really
shallow).
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