Section 53
CHAPTER LIV — OF YEARS.
'A YEAR of Saturn is a period of thirty years: of Jupiter twelve; of Mars two; of the Sun twelve months; and the same for Mercury and Venus, for they run an equal course. But the Moon's is thirty days: for this is the complete month from first appearance to conjunction.
'The Great Year some suppose to consist in a period of eight years, but others in nineteen years, and others in fifty-nine. Heracleitus makes it consist of eighteen thousand solar years: Diogenes of three hundred and sixty-five years, as many as the year has days according to Heracleitus: but others of seven thousand, seven hundred, and seventy-seven years.'
So widely do the aforesaid persons differ from each other in regard to things in the heavens above. But now look also at their opinions about the Earth.