Concept

Great Year

Overview

Length of time

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

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These two methods have grave disadvantages. The first appears even impossible. For what is the duration of the great year?
Antoine Fabre d'Olivet, The golden verses of Pythagoras
States what Great Year is; names Great Year twice.
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From these unequal motions of the planets, mathematicians have called that the "great year"[131] in which the sun, moon, and five wandering stars, having finished their revolutions, are found in their original situation. In how long a time this is effected is much disputed, but it must be a certain and definite period.
Marcus Tullius Cicero, Cicero's Tusculan Disputations Also, Treatises On The Nature Of The Gods, And On The Commonwealth
Names Great Year.
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As to the great year, some make it to consist of eight years solar, some of nineteen, others of fifty-nine. Heraclitus, of eighteen thousand. Diogenes, of three hundred and sixty-five such years as Heraclitus assigns. Others there are who lengthen it to seven thousand seven hundred and seventy-seven years.
Plutarch, Complete Works of Plutarch — Volume 3
Names Great Year twice.
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