Han Dynasty · 78-139
张衡
Zhang Heng
Polymath, astronomer, and mathematician. Invented the world's first seismoscope, explained lunar eclipses as Earth's shadow, and refined π to √10 ≈ 3.162.
Associated Workss
Ancient Science of China中国古代科学
Han Dynasty · 78-139
Zhang Heng
Polymath, astronomer, and mathematician. Invented the world's first seismoscope, explained lunar eclipses as Earth's shadow, and refined π to √10 ≈ 3.162.
Associated Workss