João Faras

João Faras, commonly referred to as Mestre João, was a prominent figure in 15th and 16th-century Portugal, excelling in multiple fields including astronomy, astrology, medicine, and surgery. His expertise earned him a prestigious position as a physician and surgeon to King Manuel I of Portugal, highlighting his reputation and skill in the medical field.

Mestre João's astronomical contributions are notable, particularly his involvement in the historic voyage led by Pedro Álvares Cabral, which resulted in the discovery of Brazil in 1500. A significant aspect of his astronomical work is a letter he penned, where he identified the Southern Cross constellation, demonstrating his keen observational skills and knowledge of celestial bodies. This letter has become a famous testament to his contributions to the field of astronomy.