Ali ibn Ridwan

Ali ibn Ridwan, born in Giza in the year nine hundred eighty-eight, was a prominent Arab physician, astronomer, and astrologer who made significant contributions to the fields of medicine and astronomy during his lifetime in Egypt.

He is particularly renowned for his detailed commentary on ancient Greek medicine, especially the works of Galen. His analysis of Galen's Ars Parva was notably translated by Gerardo Cremonese, showcasing the enduring influence of his insights on medical practices.

One of his most remarkable achievements was the observation of the supernova known as SN 1006, the brightest stellar event in recorded history. This extraordinary event was documented in his commentary on Ptolemy's Tetrabiblos, further solidifying his legacy in the annals of astronomy.

Throughout history, Ali ibn Ridwan has been referenced by European scholars under various names, including Hali, Haly, and Haly Abenrudian. His intellectual contributions extended to the theory of induction, as noted by historian Alistair Cameron Crombie. Additionally, he engaged in a notable polemic with the physician Ibn Butlan of Baghdad, highlighting the vibrant discourse of medical thought during his era.