Named for Yi Xing or I Hsing (683–727), also known as Zhang Sui. This famous Chinese astronomer of the Tang dynasty constructed a bronze armillary sphere for measuring stellar altitudes, and he conducted a large-scale latitude-measurement project in many places across China. He also reformed the Chinese calendrical system. (M 4420)
Avastatud: 9-11-1964 Avastamiskoht: Nanking Avastajad: Purple Mountain Observatory | ||
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