The un-crewed Chang’e-4 probe of China landed in the South Pole of the Moon.
Tidal Locking It is the name given to the situation when an object’s orbital period matches its rotational period. A great example of this is our own Moon. The moon takes 28 days to go around the Earth and 28 days to rotate once around its axis. This results in the same face of the Moon always facing the Earth. |