Chang Heng

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Chang Heng

 

Born AD. 78; died AD. 139. Chinese astronomer.

Chang Heng was one of the first to explain the cause of lunar eclipses and the phenomenon of lunar phases. He correctly described the apparent motion of celestial bodies and designed and built several astronomical instruments. His book, The Armillary Sphere, which appeared circa 120, presented in detail the theory of the “infinite sky.” The theory holds that the universe is boundless in time and space.

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References in periodicals archive ?
The Chinese team comprised of Zhang Heng, Che Yufei and Zhou Ying.
Chinese polymath Zhang Heng invented an instrument to detect seismic activity in 192 AD, far long before others were developed in Europe in the 1700s.
Technically speaking, an earlier form of earthquake warning machine was actually created by one Zhang Heng in China as early as AD 132, but that device - using dragons' heads and bronze balls - had long since been forgotten.
Xiao Sa's incredible journey started when one of the cyclists, Zhang Heng, 22, gave her some food on highway G318 in the Qinghai-Tibet Plateau.
Zhang Heng a student in Wuhan, Hubei province and his friends were cycling to Lhasa when they met the stray dog on G318 in the Qinghai-Tibet Plateau.
Although the sky rolls forward unassisted by hydrodynamic propulsion, about 2,000 years ago, during China's Later, or Eastern, Han dynasty (AD 23-220), a renowned and innovative astronomer, Zhang Heng, coupled a water clock with an armillary sphere to drive that instrument at the diurnal rate.
Zhou Yu/Xiu Gong Li Chen Ching Tony Leung Kar-fai Zhang Sun Honglei Train conductor Li Zhixiong Xiang Shi Chunling Liu Liu Wei Tao Gao Jingwen Librarian Dai Ke Uncle Guai Pan Weiyan Zhou Yu, as a young girl Huang Mo With: Zhang Heng, Wang Yanhui, He Jie.