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A mean sun is used as the reference fo


A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?()

  • AThe motion of the apparent sun is along the ecliptic
  • BMeasurement of time is along the celestial equator
  • CThe speed of the Earth's revolution is not constant
  • DThere are variations in the Earth's rotational speed
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