A Research on the Implication of Zhang-Chi in Ancient Chinese Astronomical Records

Details A Research on the Implication of Zhang-Chi in Ancient Chinese Astronomical Records A Research on the Implication of Zhang-Chi in Ancient Chinese Astronomical Records

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987acasn..28..397l&link_type=abstract

Acta Astronomica Sinica, Vol.28:4, P. 402, 1987

Astronomy and Astrophysics

Astronomy

Scientific paper

A set of length units with 1 zhang = 10 chi = 100 cun was used to describe celestial phenomena in ancient Chinese astronomy, but its exact definition has not been found. From 138 records of planets with zhang, chi, cun made from 147 BC to 1238 AD, the author has obtained statistically one chi is equal to 0°.93. It is concluded that ancient astronomers used zhang, chi, cun as angular units with clear concept, one chi equal to 1°.

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