Calendars with Olympiad display and eclipse prediction on the Antikythera Mechanism Nature, July 31, 2008 On the Antikythera Mechanism established a highly complex ancient Greek geared mechanism with front and back output dials (1-7). The upper back dial is a 19-year calendar, based on the Metonic cycle, arranged as a five-turn spiral (1, 6, and 8). The lower back dial is a Saros eclipse-prediction dial, arranged as a four-turn spiral of 223 lunar months, with glyphs indicating eclipse predictions…
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