Even though we only see one side of the Moon, the Moon rocks back and forth so we actually see up to 59% of the of the lunar surface. This rocking back and forth is called lunar libration.
The Beautiful eclipse
Have you ever seen a solar eclipse and wondered why the moon and sun appear to be the same size from earth? A beautiful coincidence allows us to view the eclipse the way we do, the sun is about 400 times farther and has 400 times the diameter of the moon, this allows for a complete eclipse of the sun when viewed from earth. Every year the moon inches farther away and one day a complete eclipse will no longer happen, lets enjoy this beautiful gift from the universe while we still have time.