Question

Why can't we see the backside of the moon?

Answer 1

we can't see the back side of the Moon because we are facing to the front side of the moon if you are in u.s then u can't see the backside but not the front side.

Answer 2

See Understanding the moon phases). If the Moon didn't spin at all, then eventually it would show its far side to the Earth while moving around our planet in orbit. However, since the rotational period is exactly the same as the orbital period, the same portion of the Moon's sphere is always facing the Earth.