Shabnumā-wa-Rūznumā A Rare Astronomical Instrument Extant in Two Specimens
Publish place: Journal for the History of Science، Vol: 8، Issue: 1
Publish Year: 1389
نوع سند: مقاله ژورنالی
زبان: Persian
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شناسه ملی سند علمی:
JR_JIHS-8-1_007
تاریخ نمایه سازی: 10 بهمن 1402
Abstract:
In India, there are extant two nineteenth century specimens of an otherwise unknown astronomical instrument called Shabnum?-wa-R?znum? with which observations can be done both in the day and at night. While the R?znum? is nothing but a sine/horary quadrant, the Shabnum? appears to be inspired by the Sanskrit instrument Dhruvabhrama-yantra which was invented by Padman?bha in the first quarter of the fifteenth century in Central India. After a brief description of the Dhruvabhrama-yantra, the two specimens of the Shabnum?-wa-R?znum? are described in detail.
Authors
Sreeramula Sarma
Formerly Professor of Sanskrit, Aligarh Muslim University, India
Mohammad Bagheri
Institute for the History of Science, University of Tehran, Iran