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Philosophy & Social Sciences

Abraham Zacuto

Who

Abraham Zacuto · Philosophy & Social Sciences

What

Astronomer and mathematician; his astronomical tables and improved astrolabe guided Portuguese and Spanish navigators including Vasco da Gama and Columbus

When

c. 1452, Salamanca, Spain — c. 1515, Damascus, Ottoman Syria

Where

Spain · Portugal · North Africa · Ottoman Levant

Biography

Abraham Zacuto is recognized among Jewish contributors to Philosophy & Social Sciences — Astronomer and mathematician; his astronomical tables and improved astrolabe guided Portuguese and Spanish navigators including Vasco da Gama and Columbus

How & why

Abraham Zacuto was a Sephardic Jewish astronomer, mathematician and rabbi whose 'Almanach Perpetuum' and improved copper astrolabe gave sailors reliable tables of solar declination and celestial positions. Portuguese and Spanish navigators — reportedly including Vasco da Gama and Christopher Columbus — relied on his data for open-ocean voyages. Expelled from Spain in 1492 and later from Portugal, he continued his work in North Africa and the Ottoman lands. He was an observant Jew and rabbinic scholar.

Sources & external links
Contributions & Sources

Astronomer and mathematician; his astronomical tables and improved astrolabe guided Portuguese and Spanish navigators including Vasco da Gama and Columbus

c. 1452 CE

Source: Jewish Encyclopedia