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Ancient Astronomical Computer Decoded 233

slimjim8094 writes "A mechanical device from 150BC was found in a shipwreck. Upon examination with X-Rays, the device appeared to be a revolutionary computer used to calculate lunar cycles. This device "is technically more complex than any known for at least a millennium afterward." From the article "The hand-operated mechanism, presumably used in preparing calendars for planting and harvesting and fixing religious festivals, had at least 30, possibly 37, hand-cut bronze gear-wheels, the researchers said. A pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon's elliptical orbit around Earth."

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