Al-Birjandi
al-Birjandi | |
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al-Kashi | |
Academic work | |
Era | Islamic Golden Age |
Abdal Ali ibn Muhammad ibn Husayn Birjandi (
Astronomy
Al-Birjandi was a pupil for Mansur ibn Muin al-Din al-Kashi, a member at the Samarkand Observatory, otherwise known as
The small or large rock will fall to the Earth along the path of a line that is perpendicular to the plane (sath) of the horizon; this is witnessed by experience (tajriba). And this perpendicular is away from the tangent point of the Earth's sphere and the plane of the perceived (hissi) horizon. This point moves with the motion of the Earth and thus there will be no difference in place of fall of the two rocks.[6]
Works
Al-Birjandi wrote some more than 13 books and treatises, including:[7]
- Sharh al-tadhkirah, a commentary on Tadhkira, Brill Academic Publishers.
- Sharh-i Bist Bab dar Ma'rifat-i A'mal-i al-Asturlab (Commentary on "Twenty Chapters Dealing with the Uses of the Astrolabe" of Nasir al-Din al-Tusi; Persian.[11]
- Risalah fi Alat al-Rasad (Epistle on observational instruments); in Arabic.
- Tadhkirat al-Ahbab fi Bayan al-Tahabub (Memoir of friends: concerning the explanation of friendship [of numbers]); in Arabic.
Birjandi contributed to many different fields besides his commentaries. His works included studies of
He also had works in the field of theology and made a series of almanacs in 1478/1479.
References
- ^ ISBN 978-1-4419-9916-0, retrieved 2020-11-21
- S2CID 142586786.
- S2CID 145372613.
- ISBN 978-0-387-31022-0. (PDF version)
- ^ (Ragep 2001b, pp. 63–4)
- ^ (Ragep 2001a, pp. 152–3)
- ^ "Encyclopaedia Iranica". Archived from the original on 2019-04-16. Retrieved 2007-08-07.
- ISBN 978-1-4419-9916-0, retrieved 2020-11-21
- ^ "The Institute of Ismaili Studies – The Calligraphic Tradition in Islam". Archived from the original on 2013-05-11. Retrieved 2007-08-07.
- ^ Powell's Books – Islamic Philosophy, Theology, and Science, #47: Arabic Astronomy in Sanskrit Arabic Astronomy in Sanskrit: Al-Birjand? on Tadhkira II, Chapter 11 and Its Sanskrit Tranal-Birjand? on Tadhkira II, Cha by Takanori Kusuba
- ^ Manuscript Exhibition 2007