Sahl ibn Bishr
Syriac astronomer and astrologer / From Wikipedia, the free encyclopedia
Sahl ibn Bishr al-Israili (c. 786–c. 845), also known as Rabban al-Tabari and Haya al-Yahudi ("the Jew"), was a Jewish[1][2][3] or Syriac Christian[4][5] astrologer,[6] astronomer and mathematician from Tabaristan. He was the father of Ali ibn Sahl the famous scientist and physician, who became a convert to Islam.[7]
He served as astrologer to the governor of Khuristan and then to the vizier of Baghdad. He wrote books on astronomy, astrology, and arithmetic, all in Arabic.[8]