The Moon is in synchronous rotation about the Earth. Most major
moons in the solar system have a synchronous rotation.
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It is in synchronous rotation, like our Moon.
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Synchronous rotation is when the time of rotation equals the
time of the orbit, resulting in a situation where the same side of
a body is pointing inward like in the moon.
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By definition a synchronous generator must be synchronous. If it
is not "locked in" it is not a synchronous generator, but an
induction machine.
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The rotation of Phobos is Synchronous meaning ''Existing or
occurring at the same time.''