If you stay at the same place on the moon and don't move around, then
you see the sun rise, take two weeks to slowly cross the sky, then set at
the opposite horizon, and stay gone for another two weeks. A closer figure
is 29.53 days for the complete day-night cycle.
If the Earth is in the sky as seen from where you are on the moon, then it's
always there, in virtually the same place without ever moving. It never sets,
and it displays a full set of phases every 29.53 days. If the Earth is not in the
sky from where you are, then it never rises, and you never see it at all.
What makes the Moon unique in this regard is that while it always faces its face toward Earth, it's period of rotation [around it's axis] is the same as it's period of revolution [around the Earth]; as in one rotation per revolution.
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