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Al-Biruni

973–1048 · Polymath and astronomer · Khwarazm (modern Uzbekistan); later lived in Ghazni
Historical image of Al-Biruni

A master of astronomy, mathematics and Indology, he wrote a monumental work systematically describing Indian civilization.

Life

Moving Between Royal Courts

Al-Biruni was born in Khwarazm and in his youth studied mathematics and astronomy under several scholars. He served at the Khwarazmian court and with local Persian princes, moving several times because of the region's political turmoil. In 1017, after Sultan Mahmud of the Ghaznavids conquered and annexed Khwarazm, he was taken to the Ghaznavid court at Ghazni in Afghanistan.

Book of India

He accompanied Mahmud on several expeditions to India, using the opportunity to learn Sanskrit and study India's religions, philosophy, astronomy, calendars and social customs in depth. The result was the Book of India, which records Indian civilization in the restrained voice of an outside observer, with an evenhandedness rare among works of his time. He also calculated the radius of the Earth, discussed the possibility that the Earth rotates, and wrote several astronomical tables and works on mineralogy.

Polymath

Later generations regard al-Biruni as one of the most learned scholars of the Islamic Golden Age, with writings spanning mathematics, astronomy, geography, history, mineralogy and other fields. Although he spent many years in the service of the Ghaznavids, who conquered India by force, his Book of India shows a rare respect and curiosity toward Indian civilization; modern scholars often cite this contradiction as a classic case in discussing the complex relationship between "conquerors and conquered civilizations."

Legacy

Al-Biruni is known for his rigorous empirical approach, emphasizing observation, experiment and comparison, and did pioneering work in astronomy, geodesy, calendar science and mineralogy. His Book of India describes Indian religion, philosophy and science objectively and in detail, and is often regarded as a pioneering work of comparative religion and anthropology. Many of his works long went untranslated in Europe, and his scholarly stature was reappraised only in modern times.

Major works & achievements

Did you know? There is a crater on the Moon named after him.

Key dates

See the world in 1017 on the map →

Contemporaries

Battles during their lifetime