Timing Records of Ancient Lunar Eclipses in China and Long-term Variation of the Earth's Spin Speed
نویسندگان
چکیده
The Chinese ancient accounts of timing observations of 48 lunar eclipses and the secular variation of the Earth's spin speed are discussed. A series of T expressing the secular deceleration of the Earth's rotation was obtained. The average increase rate of length of the day is about 1.5 milliseconds per century.
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