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On average, the moon rotates once for every orbit completed around earth. This is the reason that the same hemisphere of the moon always faces earth. The rotation is a sidereal period, which means that the rotation would be obvious if we could observe the moon from the same point of view as the distant stars far to the north of the solar system. The rotation is a true rotation. Its almost stationary appearance is 'apparent', but not 'true'.

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For more advanced and technical information on the moon's rotation, study the topic of "libration". Libration is another "apparent" motion we observe from earth, and not a true motion.

1. The moon turns once on its axis each time while it orbits earth.

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