Abū Naṣr al-Fārābi (أبو نصر محمد الفارابي - Abū Naṣr Muḥammad al-Fārābi; for other recorded variants of his name see below) known in the West as Alpharabius (c. 872 – between 14 December, 950 and 12 January, 951), was a Muslim polymath and one of the greatest scientists and philosophers of the Islamic world in his time. He was also a cosmologist, logician, musician, psychologist and sociologist.