Question

Explain why cant we never see the backside of moon from the earth

Answer 1

Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth – a situation known as synchronous rotation, or tidal locking. The Moon is directly illuminated by the Sun, and the cyclically varying viewing conditions cause the lunar phases.

Answer 2

The rotation period of the moon and the earth on their respective axis is almost the same. That is why we always see only one side of the moon, and the other side or the back side of the moon remains hidden.