The Great Year: From Ancient Observation to Modern Science

The Great Year explores one of the most profound cycles in nature: the slow turning of the heavens through the precession of Earth's axis.

Measured not in ordinary years, but in vast celestial motion, the Great Year describes the gradual shifting of the equinoxes through the constellations. Traditionally estimated at approximately 25,920 years and refined by modern astronomy to around 25,770 years, this cosmic rhythm has been observed, interpreted, and transmitted across cultures for millenn...