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Whats the difference between sidereal and synodic, or sidereal and solar?

April 26, 2017sidereal solar synodic

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Whats the difference between sidereal and synodic, or sidereal and solar?

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“Sidereal” refers to motion with respect to the distant stars. You might think of the various sidereal rotational or orbital periods as the “true” or “absolute” rotational periods, if you like. The various other periods tend to be with respect to something we see on Earth.