The two-thousand-year astrological age assigned to the era of the fish, by precession of the equinoxes, and the clock behind the Maxwell lecture's claim that religions are zodiac-age branding.
Documented
The documented drift
Documented astronomy: axial precession, 25,772-year cycle, shifts the equinox through the zodiac; Hipparchus's discovery c. 125 BCE; the vernal point currently in Pisces near the Aquarius border, with the IAU boundary crossing computed around 2600 CE. The age framework itself is astrological, not astronomical: sign boundaries, start dates, and even the count differ by school, with published Age-of-Aquarius start dates spanning 1447 to 3597.
Assessment: Precession is documented physics. The ages are a documented interpretive tradition with no agreed clock-face. The correlation between ages and eras is the contested layer, and the uncertainty in boundaries undercuts every confident claim built on them.
Stories
The fish, the ram, the bull
The folk file, Maxwell's core exhibit: the golden calf of the Taurus age, the ram's horn of Aries, the fish of Pisces with its fishermen apostles and loaves, and the water-bearer of Aquarius arriving as networks and knowledge pour out. Each age gets the symbol the sky was pointing at, per the reading, and the old symbol is always smashed by the new age's prophet.
Assessment: The symbol sequence is real iconography; the causal arrow, sky first, religion follows, is the reading. The documented disagreement on when any age starts is the folk version's silent patch.
Interesting claims
The wardens' calendar
The claim: the ages are the system's shift schedule, each era's religion the appropriate control firmware for that precessional sector, the Piscean faith-age yielding to the Aquarian information-age on the mill's own timetable. The milder esoteric reading: the zodiac is simply the only clock long enough to notice civilizational seasons.
Assessment: The firmware claim is the archive's trap-wing language, filed as such. The long-clock observation is the one part of the file both astronomers and astrologers sign.
Sources and further reading
Hipparchus's precession discovery, c. 125 BCE
The 25,772-year cycle, modern measurement
Campion, The Book of World Horoscopes, on the 1447-3597 start-date range
The IAU 1930 constellation boundaries
Worth asking
Coincidence, calendar, or is the zodiac the oldest long-range clock humanity keeps ignoring?