Spaceship Moon

[Namaste]

Isn't that a spin in relation to the sun? As in, any object floating in orbit and never moving in relation to us, still has a spin in relation to the sun?

That does not really mean anything to me.

Ignore the sun for the moment as the moon is an earth satellite.

If you held a basketball on the floor, and then got a tennis ball, and then, while keeping the tennis ball still, rotated it around the earth, you would notice that the side facing the earth 'rotates'. Which would appear as if the moon was spinning (from earth's perspective).

However, if you rotate the tennis ball around the earth, while keeping one side (as such) of the ball always facing the earth, you'll notice that you have to spin the moon to do so, which paradoxically, looks as if the moon is not spinning from earths perspective :¬)

Which is what 'the rotation of the moon is proportional/equal to it's orbit around the earth' means :¬)