Which brings us to the third form in which evidence of precession is displayed in the form of sacred figures stored in myths, texts and the dimensions of sacred buildings. While this theory is not accepted by everyone, there has been some serious research in this subject (i.e. Hamlets Mill: Santillano), and it should not be dismissed out of hand.

(1:43,200)

(A new constellation appears on the horizon each 2,160 years...)

(...and 2,160 x 2 = 4,320 years)

Knowledge of stellar constellations - At least 43 constellations were familiar to the Egyptians in the 13th century B.C. (1).

The oldest known copies of an almanac date from 1220 BC at the time of Ramses the Great. In 1100 BC Amenhope wrote "Catalog of the Universe" in which he identified the major known constellations.

The writing of astronomical texts - Clement of Alexandria gives the titles of four Egyptian astronomy books (which have not survived): a) On the Disposition of Fixed Stars and Stellar Phenomena, b) On the Disposition of the Sun, Moon and Five Planets, c) On the Syzergies and Phases of the Sun and Moon, d) On Risings. These texts may not have been intended for publication, but were available only to the priesthood, which forbade the general exposure of their philosophy. This may help to explain why so little of Egyptian science has come down to us directly from the Egyptians, rather than indirectly from the Greeks such as Pythagoras, who was initiated into the Egyptian mysteries. (1)

Tables of star culminations and risings. (1)

Knowledge of planetary astronomy - Five planets were known to the Egyptians; the retrograde motion of Mars was known; the revolution of Mercury and Venus around the Sun was known. (1)

Prediction of eclipses.

Discovery of the occulations of the stars and planets by the dark side of the half-moon. (1)

Discovery that the Earth is spherical - The first (official) measurement of the radius of the earth was made by Erasthenes (b. 275 B.C.), who was the head of the great library of Alexandria. He was born in Cyrene, now Libya. It seems likely that the ancient Egyptians, much before Egypt's conquest by Alexander the great, had already grasped the idea of a spherical Earth, and it was from them that this doctrine was adopted by Pythagoras, who, as we know, spent many years of study in Egypt. (1)

Discovery of the obliquity of the ecliptic - Diodorus Siculus (70 B.C.) reports that Egyptian priests claimed it was from Oenopides of Chios that we learned the sun moved in an inclined orbit and oppositely to the motion of the other stars. In this connection, it should be noted that the priority of Oenopides claim to this discovery is disputed by Pythagoras. In view of the fact that both Pythagoras and Oenopides went to Egypt to study astronomy, it would seem only fair to give their Egyptian teachers at least some of the credit. (1)

First proof that the angular diameters of the sun and moon re unequal - Sosigenes (2nd Cent. A.D), the Egyptian astronomer who gave Europe the Julian calendar, showed that the angular diameters are unequal by advertising to the phenomena of annular eclipses of the sun. (1)

First use of the Clepsydra (water clock), to measure the angular diameter of the sun. (1)

Discovery of the conjunction of the planets with each other as well as the fixed stars - This is on the testimony of Aristotle in his Meterology. (1)

The Heliocentric theory of the rotation of the earth and other planets about the sun. (1)

Source: http://www.ancient-wisdom.co.uk