equation of time

- noun the time that must be added to mean
__solar__time, as__given__by a clock, to make it__equal__to__apparent__solar time, as given by a sundial

- The difference, of a few minutes at most, between noon and the time at which the Sun reaches the meridian on a particular day. The difference is a consequence of the eccentricity of the Earthâ€™s orbit, which prevents the Earthâ€™s rotation and its orbital motion from remaining in perfect step.

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