Antikythera mechanism, world's oldest computer, followed Greek lunar calendar

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Owen Jarus is a regular contributor to Live Science who writes about archaeology and humans' past. He has also written for The Independent (UK), The Canadian Press (CP) and The Associated Press (AP), among others. Owen has a bachelor of arts degree from the University of Toronto and a journalism degree from Ryerson University.

The Antikythera mechanism — an ancient shoebox-sized device that was used to track the motions of the sun, moon and planets — followed the Greek lunar calendar, not the solar one used by the Egyptians, as was previously thought, new research reveals.

In 2020, a team led by independent researcher Chris Budiselic used new X-ray images of the device, combined with measurements and mathematical analysis, to determine that the mechanism likely didn't cover a full solar calendar year but rather 354 days, as would be used in a lunar calendar. It had been thought that it might have used the 365 Egyptian solar calendar since it’s more accurate than the 354 day lunar calendar.

RELATED STORIES—World's first computer, the Antikythera Mechanism, 'started up' in 178 B.C., scientists claim—Ancient Greek 'Computer' Came with a User Guide

 

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