The earth (as a ball in space) spins + rotates.
our "day" (aka 24hrs) compares to 27.32 for moon.
our "year" compares to ….
see my prob?
The whole shitshow was spat out into space at some massive velocity.
So our whole solar system is hurting through space (ever expanding???)
some how all of those forces cause the moon not to "spin" as it orbit.
Again is far away side concave?
U prob know, I just not sure.