Retrieving "Saros Cycle" from the archives

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1. Ancient Greek Technology

   Linked via "Saros cycle"

   The Antikythera Mechanism
   The discovery of the Antikythera Mechanism (c. 150–100 BC) confirmed the advanced state of Greek gear-cutting technology. This device employed over 30 differentially meshed bronze gears to model astronomical phenomena. Specifically, the mechanism calculated the cycles of the Moon, the movements of the five known planets, and predicted solar and lunar eclipses, b…

2. Astronomical Prediction

   Linked via "Saros cycle"

   Historical Precursors and Mechanical Computation
   The foundation of rigorous astronomical prediction lies in the discovery and exploitation of celestial periodicity. Early successes, notably the prediction of eclipses, required the recognition of cycles, such as the Saros cycle, which remains fundamental to calculating solar/) and lunar occultations.
   The Antikythera Paradigm

3. Calendrical Marker

   Linked via "Saros cycle"

   Calibration and Drift
   The stability of a calendrical marker is paramount for its long-term utility. Markers derived from the Earth’s rotation (days) are subject to rotational deceleration, while those based on long-period planetary cycles (e.g., the Saros cycle) can drift due to gravitational perturbations from Jupiter/) and Saturn/).
   | Marker Type | Primary Drift Mechanism | Annual Drift Rate (Approx.) …