[SunkenCiv]

The Moon stopped turning on its axis because it has been transferring momentum to the Earth and is a mere 1 per cent of Earth's mass. Meanwhile the two bodies have been moving away from one another as a consequence of this momentum transfer.

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[poindexter]

The Moon stopped turning on its axis because it has been transferring momentum to the Earth and is a mere 1 per cent of Earth's mass.

The Moon hasn't stopped turning on its axis. The period of rotation exactly matches its orbital period, so it appears to have stopped rotating, to us here on Earth.