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Guo Shoujing

Type Figure Region North China Time 1231–1316 Also known as Guo Ruosi

Guo Shoujing (1231–1316), courtesy name Ruosi, was a Yuan-dynasty astronomer, mathematician, and hydraulic engineer who directed the Shoushi Calendar…

Timeline

  1. 1247–1270Xingzhou · HebeiIn his youth he studied astronomy, mathematics, and hydraulic engineering under Liu Bingzhong, showed talent around Xingzhou, and was later recommended into Kublai Khan's retinue to take part in scientific and administrative affairs.
  2. 1271–1280Dadu · DaduWith Wang Xun and others he directed nationwide astronomical observations, developed instruments such as the simplified armilla and gnomon, measured the tropical year, and completed the Shoushi Calendar in the seventeenth year of Zhiyuan, achieving world-leading precision for its time.
  3. 1281–1316Dadu · DaduAfter the Shoushi Calendar he continued to direct hydraulic repairs such as Dadu's Tonghui Canal, improved astronomical instruments, held various technical offices, and applied astronomical calculations to state governance and engineering works.

Sources