Gautama Siddha

8th century) astronomer, astrologer and compiler of Indian descent, known for leading the compilation of the Treatise on Astrology of the Kaiyuan Era during the Tang dynasty.

He was born in Chang'an, and his family was originally from India, according to a tomb stele uncovered in 1977 in Xi'an.

He was most notable for his translation of Navagraha calendar into Chinese.

He also introduced Indian numerals with zero (〇) in 718 in China as a replacement of counting rods.

This biographical article about a Chinese scientist is a stub.