Abu Abdallah Mohammad ibn Jabir Al-Battani

lived from 850 to 929

Al-Battani or Albategnius was an Islamic astronomer and mathematician. He made important accurate measurements of the stars, moon and planets. His measurements and methods were used by later astronomers.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Al-Battani.html