Which function did the 'Equation of Time' serve in pre-18th century astronomical timekeeping?

💡 Explanation

Before accurate clocks, sundials indicated solar time, which varies due to Earth’s elliptical orbit and axial tilt. The Equation of Time applied a correction representing this variance, aligning sundial time with a mean solar time approximation for early clocks. Therefore, correcting sundial time results rather than predicting eclipses, conjunction frequency, or star chart errors which depend on different astronomical models.

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