Moon appears to be facing its same side to earth throughout its orbit around earth.
This is said to be because of tidal locking , i.e. the moon rotates at the same rate as it revolves around the earth.
But how close does it rotation and revolution periods match? Are they 100% equal? It could be rotating say a millionth of a degree each year with respect to earth
Is it possible that there is a slight difference and in a million years we'll see a different side of the moon