Planet Rotation Parameter
   For a slowly rotating planet, only the sunlit hemisphere ("daytime side") emits energy significantly. For such a planet, the "Average T" refers to the average temperature of the sunlit hemisphere (the "night" side of such a planet will be extremely cold, as is the case for Mercury and the Moon).
   For a rapidly rotating planet, the "day" and "night" hemispheres have comparable temperatures and the entire surface (day AND night) will emit energy significantly. Since the "night" side of the planet accounts for some of the emitted heat energy, less heat energy needs to be emitted by the "day" side and the temperature will be lower than in the slowly rotating case.
   Changing the rotation rate will not affect the "reflected sunlight" peak in the spectrum but will change the amplitude and position of the infrared peak.
   Changing the planet rotation will have no affect on the "Visible Appearance" display.

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