Why can't we see the other side of the moon?
You can test this mathematical quandary for yourself, Use a standing lamp as a stand in for the earth and you play the role of the moon, Shuffle sideways around an orbit in a clockwise direction, keeping your face always turned to the lamp. While making one orbit, you will face north, east, south and west. This turn around of your body compares with the moon's rotation on its axis.
The moon rotates on its axis and revolves around its orbit. It keeps the same side facing the earth because the. time it takes to make a revolution is exactly equal to the time it takes to rotate on its axis,