Well, i think cuz of gravity, it sticks you to the surface your at, and as the moon rotates around the earth you just need to look at the direction place you look at earth, its like a mirror, or your shadow!
Well, i think cuz of gravity, it sticks you to the surface your at, and as the moon rotates around the earth you just need to look at the direction place you look at earth, its like a mirror, or your shadow!