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by zokier
872 days ago
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See also https://en.wikipedia.org/wiki/Shortt%E2%80%93Synchronome_clo... > The Shortt was the first clock to be a more accurate timekeeper than the Earth itself; it was used in 1926 to detect tiny seasonal changes in the Earth's rotation rate. Shortt clocks achieved accuracy of around a second per year If my math is right, thats about 30ppb |
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