10 Famous Muslim Scientists of Past

     Al-Battani (858 – 929)

He is also  known as Albatenius. An arab mathematician, scientists and astronomer... who improved existing values for the length of the year and of the seasons..Al-Battānī's major work is Kitāb az-Zīj  "Book of Astronomical Tables". It was  based on Ptolemy's theory, and other Greco-Syriac sources...