About the craters at the south pole, where the sun never shines: Have the moon's poles always been about where they are now? I understand the that the earth's north and south poles (relative to the ecliptic) move quite a distance through millions of years, and that they haven't always pointed to Polaris. Do the moon's poles also move relative to the sun's equator? Does the moon have a north star?
My other question is, how long has it been since a theoretical observer on earth could see the lunar far side? That is, how long has the moon been tidally locked? Could a dinosaur have seen the far side, or would you have to go further back than that? I understand that the moon was closer to the earth; did it also rotate faster?
I was wondering if either a wobble in the lunar poles, or the speed of the moon's rotation would matter, as to the idea of permanently shadowed craters.
Thanks for your input!