''Zīj as-Sindhind'' (, ''Zīj as‐Sindhind al‐kabīr'', lit. "Great astronomical tables of the Sindhind"; from

Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...

''siddhānta'', "system" or "treatise") is a work of

zij A zij ( fa, زيج, zīj) is an Islamic astronomical book that tabulates parameters used for astronomical calculations of the positions of the Sun, Moon, stars, and planets. Etymology The name ''zij'' is derived from the Middle Persian term ' ...

(astronomical handbook with tables used to calculate celestial positions) brought in the early 770s AD to the court of Caliph

al-Mansur Abū Jaʿfar ʿAbd Allāh ibn Muḥammad al-Manṣūr (; ar, أبو جعفر عبد الله بن محمد المنصور‎; 95 AH – 158 AH/714 CE – 6 October 775 CE) usually known simply as by his laqab Al-Manṣūr (المنصور) w ...

in Baghdad from

India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...

. Al-Mansur requested an Arabic translation of this work from the Sanskrit. The 8th-century astronomer and translator

Muhammad al-Fazari Muhammad ( ar, مُحَمَّد; 570 – 8 June 632 CE) was an Arab religious, social, and political leader and the founder of Islam. According to Islamic doctrine, he was a prophet divinely inspired to preach and confirm the monoth ...

is known to have contributed to this translation. In his book ''Ṭabaqāt al-ʼUmam (Categories of Nations)'',

Said al-Andalusi Ṣāʿid al-Andalusī (); he was Abū al-Qāsim Ṣāʿid ibn Abū al-Walīd Aḥmad ibn Abd al-Raḥmān ibn Muḥammad ibn Ṣāʿid ibn ʿUthmān al-Taghlibi al-Qūrtūbi () (1029July 6, 1070 AD; 4206 Shawwal, 462 AH); an Arab qadi of Toledo ...

informs that others who worked on it include al-Baghdadi and

al-Khwarizmi Muḥammad ibn Mūsā al-Khwārizmī ( ar, محمد بن موسى الخوارزمي, Muḥammad ibn Musā al-Khwārazmi; ), or al-Khwarizmi, was a Persian polymath from Khwarazm, who produced vastly influential works in mathematics, astronom ...

. He adds that its meaning is "ad-dahr ad-dahir" (infinite time or cyclic time).

Content

This is the first of many Arabic zijs based on the Indian astronomical methods known as the Sindhind. The work contains tables for the movements of the sun, the moon and the five planets known at the time. It consists of approximately 37 chapters on calendar and astronomical calculations and 116 tables with calendar, astronomical and astrological data, as well as a table of sine values. As described by Said al-Andalusi, as-Sindhind divides time into cyclic periods of creation and destruction which are called

Kalpa (aeon) A ''kalpa'' is a long period of time (aeon) in Hindu and Buddhist cosmology, generally between the creation and recreation of a world or universe. Etymology ''Kalpa'' ( sa, कल्प, , a formation or creation) in this context, means "a lon ...

Notes

Sources

* *
PDF version
Astronomical works of the medieval Islamic world History of astronomy Astronomy in India Astronomical tables {{astronomy-book-stub