Question

why do we see only one side of the moon?​

Answer 1

Explanation:

One side of the moon always faces Earth because of what's called synchronous rotation. That is, the moon rotates, or spins on its axis, in the same length of time it takes to orbit Earth. ... For that reason, our moon always has one side facing Earth, which we call the moon's near side

or,

One revolution of the moon around the earth takes about 27 days. Incidentally, the moon's rotation about its own axis also takes nearly the same time. One day of the moon is equal to 27 Earth days. So only one side of the moon can be seen from the earth.

Answer 2

Explanation:

Earth orbits the Sun once every 365 days (a year) and spins on its axis once every 24 hours (a day). The Moon orbits Earth once every 27.3 days and spins on its axis once every 27.3 days. This means that although the Moon is rotating, it always keeps one face toward us.