The idea of a dawning new age has been around for a long time – but what does it mean astronomically? This short video explains why there are three zodiacs, and what the Age of Aquarius actually means.
Further reading on this topic
For a good overview of the different systems:
‘Ayanamshas in Sidereal Astrology’ article by Dieter Koch
For a detailed discussion on the Great Year and its confusion with the precessional year:
‘Ancient Zodiacs, Star Names, and Constellations: Essays and Critiques’ article by Gary D. Thompson
A book giving a deeper look at the history of Millenarianism in the Western Tradition:
The Great Year, by Nicholas Campion (Arkana, 1994)