Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

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The description of the word you requested from the astronomical dictionary is given below.

the equation of time

The equation of time indicates how much you should subtract from the true solar time (as read from a sundial) to get the mean solar time, which runs as regularly as a mechanical clock. The equation of time occurs because the orbit of the Earth around the Sun is not an exact circle, and because there are seasons.