Tidal locking occurs when the gravitational pull of the planet on the moon is strong enough to slow down the moon's rotation. This can happen if the moon is close to the planet or if the moon is very massive.
Tidally locked moons have a number of interesting properties. For example, they always have one side that is very hot and one side that is very cold. The side that faces the planet is heated by the planet's sunlight, while the side that faces away from the planet is cooled by the darkness of space.
Another interesting property of tidally locked moons is that they can cause the planet they are orbiting to wobble. This is because the moon's gravity pulls on the planet, causing it to bulge out slightly on the side that is facing the moon. This bulge can cause the planet to wobble as it rotates.
Tidal locking is a common occurrence in the solar system. Many of the moons in the solar system are tidally locked, and even some planets have been known to be tidally locked, for example, Pluto rotates once every 6.387 Earth days, and its moon Charon orbits it once in the same amount of time, thus the two bodies are tidally locked.
