Who Was Abu Abdullah Al-Battani?

Abu Abdullah Muhammad Ibn Jabar Ibn Sinan Al-Battani, known in the West as Albategnius, was born at or near Battan, which is a state of Harran, in 858 C.E. Al-Battani got his primary education by his father, who was a famous scientist. He then moved to Raqqa at the Bank of Euphrates, to get his higher education. He migrated to Sammara at the end of the ninth century and worked there till his death in 929 C.E.

Abu Abdullah Muhammad Ibn Jabar Ibn Sinan Al-Battani made many important discoveries in Astronomy. He made a remarkably accurate and astounding calculation about the length of the Solar Year, i.e. 365 days, 5 hours, 46 minutes and 24 seconds. This calculation is very close to the latest estimated length of Solar Year.

Abu Abdullah Muhammad Ibn Jabar Ibn Sinan Al-Battani wrote many books on Astronomy. His most famous book was translated into Latin in the 12th Century and is known by the title 'De Scienta Stellarum – De Numeris Stellarum et Motibus'. It is an Astronomical article with tables.
An old translation of De Scienta Stellarum – De Numeris Stellarum et Motibus can be found at the Vatican. Copernicus in his ever-famous book 'De Revelutionibus Orbium Celestium' expresses his gratitude to Al-Battani.