Abraham Zacuto

Abraham Zacuto
Born	(1452-08-12)12 August 1452 Salamanca, Kingdom of Castile and León
Died	1515 (aged 62–63) Jerusalem or Damascus, Mamluk Sultanate

Abraham Zacuto (Hebrew: אַבְרָהָם בֵּן שְׁמוּאֵל זַכּוּת‎, romanized: Avraham ben Shmuel Zacut, Portuguese: Abraão ben Samuel Zacuto; 12 August 1452 – c. 1515) was a Castilian astronomer, astrologer, mathematician, rabbi and historian who served as Royal Astronomer to King John II of Portugal.

His astrolabe of copper, his astronomical tables and maritime charts played an important role in the Spanish and Portuguese navigation capability. They were used by Vasco Da Gama and Christopher Columbus.^[1]