al-Biruni
- Died
- 440 AH
- Born in
- Khwarazm
Abu al-Rayhan al-Biruni (362–440 AH / 973–1048 CE) was a Khwarazmian polymath, astronomer, mathematician, and physician celebrated for his astronomical compendium al-Qanun al-Mas'udi (The Mas'udic Canon) and his study of Indian culture, Tahqiq ma li al-Hind (Verifying What Pertains to India).
Name and Origin
His full name was Muhammad ibn Ahmad Abu al-Rayhan al-Biruni al-Khwarazmi, though some biographical entries record his name in reverse order as Ahmad ibn Muhammad. He was born in Khwarazm in 362 AH (973 CE). Early biographers such as Ibn Abi Usaybi'a and Shams al-Din al-Shahrazuri linked his nisba al-Biruni to Bayrun, describing it as a city in Sind. However, Yaqut al-Hamawi traced it to the Persian word birun ("outside"), interpreting it either as an indication of his origin in the rural outskirts (rustaq) or as a label used by the people of Khwarazm for a stranger who lived outside his homeland for an extended period.
Education, Travels, and Career
Al-Biruni studied under several scholars, notably the mathematician and astronomer Abu Nasr Mansur ibn Ali ibn Iraq, as well as the philosopher Abd al-Samad. Following a major disruption in Khwarazm, he moved north to Gurganj and later traveled to Gurgan, where he entered the service of the Ziyarid ruler Shams al-Ma'ali Qabus ibn Wushmgir. He eventually returned to Gurganj, attaining high standing at the court of the Ma'munid rulers of Khwarazm.
When Sultan Mahmud of Ghazna annexed Khwarazm, he had al-Biruni's teacher Abd al-Samad executed on accusations of heresy, but spared al-Biruni due to his irreplaceable expertise in grammar and sciences, taking him to Ghazna. Benefiting from the Ghaznavid military expeditions into India, al-Biruni traveled extensively across the subcontinent for many years. There he studied Indian sciences and philosophy directly from local scholars and taught them Greek philosophical traditions in return.
Al-Biruni was an active contemporary of Ibn Sina, engaging with him in extensive written philosophical exchanges and scientific queries. Under the Ghaznavid rulers who succeeded Mahmud, al-Biruni dedicated his major astronomical work al-Qanun al-Mas'udi to Sultan Mas'ud ibn Mahmud—structuring it after Ptolemy's Almagest—and later composed al-Jamahir fi Ma'rifat al-Jawahir (The Sum of Knowledge on Precious Stones) for Sultan Shihab al-Dawla Abu al-Fath Mawdud ibn Mas'ud.
Scholarly Standing
Biographers described al-Biruni as peerless in his era in the exact sciences and the minute details of astronomy, combining profound knowledge of geometry, medicine, and languages. Yaqut al-Hamawi noted his extraordinary industriousness, stating that his hand rarely parted from his pen, his eyes from reading, or his heart from contemplation throughout the year, except on the festive days of Nowruz and Mihrajan when he gathered his basic material necessities.
Death
Al-Biruni died in Rajab 440 AH (1048 CE) at the age of seventy-eight. The jurist Abu al-Hasan Ali ibn Isa al-Walwalaji related that he visited al-Biruni on his deathbed as his breath was rattling in his chest. In that final state, al-Biruni questioned him regarding a calculation in the law of inheritance concerning non-standard maternal grandmothers (al-jaddat al-fasida). When al-Walwalaji expressed pity and asked whether such a moment was suited for inquiry, al-Biruni replied: "Is it not better that I bid farewell to this world knowing this problem rather than departing it in ignorance?" After al-Walwalaji explained the solution and al-Biruni memorized it, al-Walwalaji left his house, only to hear the lamentations of mourning shortly down the road.
Answer updated
List of Works
al-Jamahir fi Ma'rifat al-Jawahir (The Sum of Knowledge on Precious Stones) is a comprehensive treatise on mineralogy, gemstones, and metals. The text examines precious stones, gems, related minerals, metals, artificial alloys, and manufactured compounds, combining empirical physical and linguistic observations with an encyclopedic repository of cultural knowledge.
Tahqiq ma li al-Hind min maqula maqbula fi al-aql aw mardhula, also widely known as Kitab al-Hind or Tarikh al-Hind, is an encyclopedic study of Indian civilization, religions, sciences, geography, and customs. Completed around 423 AH (c. 1030 CE), it offers an accurate, documented foundation examining Indian thought directly through translated primary sources and comparative analysis.