The moon is gravitationally locked with one side always facing the Earth. It is actually orbiting the sun, and has been captured by the Earth's gravity. The planet and the moon do a whacky orbital waltz, with the moon dragging behind. Hence...no 12 hour half day for the moon.

Thanks for the answers. For some reason I cannot "like" some of the comments that were helpful. Particularly, Astrochuck's. Based on your name and bio, this is your cup of tea.

The moon is closer much much smaller and rotates around the earth.

Our Moon (Lunar) is in a locked orbit around our home Earth (Gaia) which causes it to show only one side of its total surface area to us. Strictly speaking though it is a bit more than 50% as it also 'wobbles' (called libration) slightly enabling us to see about a total of 60% over the duration of a month of 28 days or thereabouts. So it does spin on it's own axis but this takes about 28 days because of the 'locked' orbit. Difficult to visualize. When it's full moon the sunlit side is facing us. When it's 'new' moon the sunlit side is the unseen side of the lunar surface.

OK, I admit this is weird, just as they say a stopped clock shows the correct time twice a day, if the moon did not rotate we would eventually see the other side from Earth. I don't know the physics behind this, but the moon does rotate, but in the direction and at the speed necessary for the one side to always face us. Go figure. Maybe it is an alien base and they want keep their activities hidden from us?

We aren't orbiting the moon, like we are the sun. The moon is orbiting the earth.