Han Dynasty's Astronomical Legacy: Zhang Heng and the World's First Seismoscope
In this episode, Lucas and Luna explore the scientific achievements of the Han Dynasty through the life and work of Zhang Heng (78-139 CE), a polymath who served as court astronomer, mathematician, and inventor under Emperor An and Emperor Shun. They discuss his pioneering seismoscope—the first known device to detect earthquakes—which used a pendulum and bronze dragons to indicate direction of tremors. Lucas explains Zhang Heng's refinements to the armillary sphere, his treatise on cosmology (the Ling Xian), and his defense of astronomy against court rivals. The conversation also covers the Han Bureau of Astronomy, the role of celestial omens in statecraft, and why Zhang Heng's seismoscope was forgotten for centuries. The episode highlights a golden age of Chinese science that rivaled any contemporary civilization.
#ZhangHeng #HanDynasty #Seismoscope #AncientScience #ChineseAstronomy #Luoyang #EmperorAn #EmperorShun #LingXian #ArmillarySphere #EarthquakeDetection #HanBureauOfAstronomy #CelestialOmens #AncientInvention #HistoryOfScience #FexingoHistory #EastAsia #ChineseHistory
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