598 - 670
Brahmagupta was the most accomplished of the ancient Indian astronomers.
His great work 'The Opening of the Universe' is written in verse form.
Brahmagupta introduced strict rules for calculations with Zero, wrote about quadratic equations, and he wrote a table for sinus calculations. He also dealt with lunar eclipses, planetary conjunctions, and the determination of the positions of the planets.
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From the University of St. Andrews, Scotland - School of Mathematics