Originally posted by leisurelysloth
The moon is (very slowly) stealing earth's rotational energy and using it to raise the moon's orbit. Over time this is tending to make our days a bit longer, and make the moon appear slightly smaller. As Adam W. points out, this will eventually make total solar eclipses impossible.
Yeah but when?
One other thing will happen, like Mars, whose tilt can go from almost north south to like east west, that is to say, the north or south pole pointed at the sun. The moon keeps the earth from making major tilts, like ours now at about 23 degrees is about as serious as it can tilt with el luna nearby. Don't forget, tides do more than water. It also lifts and retreats the whole crust a few inches so there is a constant flexing, one effect is earthquakes tend to happen more frequently when the moon is full overhead (most flexing of the crust) So the retreat of the moon would effect weather on earth. However, here is another sub-puzzle: What will happen to the earth way before that?