Topic summary
Banu Musa
Extracted from the Wikipedia article Banū Mūsā brothers.
Early years
The Banu Musa were the three sons of Mūsā ibn Shākir, who earlier in life had been a highwayman and astronomer in Khorasan of unknown pedigree. After befriending al-Ma'mun, who was then a governor of Khorasan and staying in Merv, Musa was employed as an astrologer and astronomer.