**8. THREE MEAN MOTIONS OF
THE SUN**

The three mean motions of the Sun used in the construction of Hindu
cosmological time cycles are

As the number of diurnal revolutions of the Earth in a year is one greater than the number of mean solar days, we also have1 sidereal year = 360 (I) 6 (II) 0.2563795... (III) -------------- 366.2563795... diurnal revolutions of the Earth.

The three mean motions are like the hour, minute, and second hands of a clock. Their cycles are completed and counted separately. Using the three mean motions, the ancients developed a system of time reckoning that put the day, year, and longer time intervals into exact correspondence with each other.1 sidereal year = 365.2563795... mean solar days.

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