Not a very challenging or exciting thread but can someone please explain to me how we only see one side of the moon?
I know it is gravitationally locked but what does this mean?
Also, how can it rotate and still show us just one side, if it is rotating then we should see all sides surely?

I had it explained to me last evening at a viewing session at my local observatory, but having a few other people also listening i was too embarrassed to say, huh? Which is what i was thinking!

Much appreciated,

Steff.