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Old 04-07-2015, 09:08 PM   #361
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Arrow Astronomy Domine

Work in the observatorium of Taqi ad-Din..
The first astronomical texts that were translated into Arabic were of Indian and Persian origin.. The most notable of the texts was Zij al-Sindhind, an 8th-century Indian astronomical work that was translated by Muhammad ibn Ibrahim al-Fazari and Yaqub ibn Tariq after 770 CE under the supervision of an Indian astronomer who visited the court of caliph Al-Mansur in 770. Another text translated was the Zij al-Shah, a collection of astronomical tables (based on Indian parameters) compiled in Sasanid Persia over two centuries.. Fragments of texts during this period indicate that Arabs adopted the sine function (inherited from India) in place of the chords of arc used in Greek trigonometry..

Pink Floyd...

Zīj (Persian: زيج‎) is the generic name applied to Islamic astronomical books that tabulate parameters used for astronomical calculations of the positions of the Sun, Moon, stars, and planets.. The name is derived from the Middle Persian term zih or zīg, meaning cord.. The term is believed to refer to the arrangement of threads in weaving, which was transferred to the arrangement of rows and columns in tabulated data.. In addition to the term zīj, some were called by the name qānūn, derived from the equivalent Greek word, κανών..The content of zījes were initially based on that of the Handy Tables (known in Arabic as al-Qānūn) by Egyptian astronomer Ptolemy, the Zij-i Shah compiled in Sassanid Persia, and the Indian Siddhantas by Aryabhata and Brahmagupta... promise nothing, I do what I can.. Their fate, however, lies in God's hands.. Who ever wants to build a New World must first destroy the old!.Ghayat al Hakim ...
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