Rajat says we always see the same face of the Moon because the Moon spins exactly once on its axis…

Why

Paro's reasoning sounds airtight at first — something that keeps showing the same side seems not to be turning. But try it with a chair in the middle of a room. Walk once around the chair while always keeping your face towards it. By the time you are back where you started, you have faced every wall of the room in turn: your body has turned around exactly once, even though the chair only ever saw your face. If you walked around without turning at all — always facing the same wall — the chair would see your face, then your side, then your back. The Moon is like the walker who keeps facing the chair: it rotates on its axis once in the same time (about 27 days) that it takes to go around the Earth once, so the same face always points towards us. Test: do the chair walk yourself, once turning to keep facing the chair and once keeping your eyes fixed on one wall — only the turning walk keeps your face towards the chair. Rajat is right: the Moon does spin, exactly once for each trip around the Earth, which is why we always see the same face.