How often does the moon rotate around the earth?
Connolley makes a curious objection here to my claim that the moon rotates around the earth once a day. What is wrong with that? Doesn’t it? From the beach on holiday this effect was clearly visible. I concede that it does not do this exactly once a day. But simplification is a virtue, as Connolley himself shows when he refers to ‘two tides a day’ (actually there are two tides every 24h and 50 minutes). So what, broadly speaking, is wrong with my claim?