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Abraham Zacuto

(c. 1450–1515?), the foremost writer on astronomy in fifteenth-century Castile. Zacuto was born in Salamanca, Spain, to Jewish parents. His principal work, the Almanach perpetuum ...

Zacuto, Abraham

Zacuto, Abraham (c. 1450–1515?)   Reference library

The Oxford Companion to World Exploration

Reference type:
Subject Reference
Current Version:
2007
Subject:
History
Length:
400 words

..., Abraham ( c. 1450–1515? ), the foremost writer on astronomy in fifteenth-century Castile. Zacuto was born in Salamanca, Spain , to Jewish parents. His principal work, the Almanach perpetuum coelestium motuum , provided the first published tables and rules related to the calculation of a ship's course. In Salamanca, Zacuto probably studied at the university and came under the protection of Bishop Gonzalo de Vivero , who asked Zacuto to produce his Almanach and to whom it is dedicated. Drawn from a wide range of ancient and modern authors, the ...

Zacuto, Abraham

Zacuto, Abraham (1450–1515)   Reference library

The Oxford Encyclopedia of Maritime History

Reference type:
Subject Reference
Current Version:
2007
Subject:
History, Military History
Length:
896 words

..., Abraham (c. 1450–1515 ?) Spanish astronomer and astrologer , . Born in Salamanca, Spain , around 1450 or 1452 , Abraham bar Samuel bar Abraham Zacut (also known as Zacuto ) was a fundamental author on astronomy and astrology in fifteenth-century Castilia. His principal work, the Almanach perpetuum coelestium motuum (Almanac of the Continuous Movement of the Stars), was of essential importance to the development of Spanish-Portuguese seafaring at the end of the fifteenth century, being a source of the earliest nautical tables or...

Abraham Zacuto

Abraham Zacuto  

(c. 1450–1515?),the foremost writer on astronomy in fifteenth-century Castile. Zacuto was born in Salamanca, Spain, to Jewish parents. His principal work, the Almanach perpetuum coelestium motuum, ...
8 The Transmission of Jewish Knowledge through MSS and Printed Books

8 The Transmission of Jewish Knowledge through MSS and Printed Books   Reference library

The Oxford Companion to the Book

Reference type:
Subject Reference
Current Version:
2010
Subject:
History, Social sciences
Length:
4,966 words
Publisher:
Oxford University Press

...texts, which still existed during the Middle Ages but have since disappeared. The most famous is the so-called Hilleli Codex. In his chronicle Sefer Yuhasin , written around 1500 , Abraham Zacuto reported that the MS was still in existence, but since then no trace of it has been found. Its legendary status confirms the Jewish obsession with a correct text, and, as Zacuto put it, ‘all other codices were revised after it’. 3 Oral and written transmission The oral transmission of Jewish knowledge is best known through the concept of the written and the oral...

27 The History of the Book in the Iberian Peninsula

27 The History of the Book in the Iberian Peninsula   Reference library

The Oxford Companion to the Book

Reference type:
Subject Reference
Current Version:
2010
Subject:
History, Social sciences
Length:
6,196 words
Publisher:
Oxford University Press

...interior of Portugal, and the spread of Judaic and Christian bibliography connected with biblical exegesis lasted until the decree expelling the Jews in 1497 . The last Hebrew press was that of Samuel Dortas in Leiria, ending its activities in 1496 with three editions of Abraham Zacuto’s Almanach Perpetuum , now with the text in Latin. These firms began printing in Hebrew, but later in Latin, Castilian, and Portuguese. In Spain, the crisis facing Hebrew printing had already occurred in 1492 , the year of the expulsion, causing the disappearance of the...

Zacuto of Salamanca

Zacuto of Salamanca   Reference library

The Oxford Dictionary of the Renaissance

Reference type:
Subject Reference
Current Version:
2005
Subject:
History, Early Modern History (1500 to 1700)
Length:
131 words

... of Salamanca or (Hebrew) Abraham ben Shmuel Zacuth ( c. 1450– c. 1515 ), Spanish astronomer, mathematician, and historian, born into a Jewish family in Salamanca, where he studied and afterwards worked at the university. In the 1470s Zacuto wrote an astronomical treatise, Ha-Hibbur Ha-Gadol , which was later translated into Latin and Spanish. He later compiled a set of astronomical tables, copies of which Columbus carried on his voyages. When the Jews were expelled from Spain in 1492 , Zacuto sought refuge in Portugal, where he advised Vasco da...

Astronomers and Cosmographers

Astronomers and Cosmographers   Reference library

The Oxford Encyclopedia of Maritime History

Reference type:
Subject Reference
Current Version:
2007
Subject:
History, Military History
Length:
3,298 words

...A key figure in this development, as well as in the publication of ephemerides, was a Spanish Jew , Abraham Zacuto ( c.1450–1515 ), who compiled his Almanach perpetuum about 1474 . Zacuto was a key figure among the Jewish and Muslim scientists, who provided the basis for modern nautical science through their knowledge of Arabic and Hebrew science, their training programs, and the manuals they compiled. Most important for navigation were Zacuto’s tables for the declination of the sun at noon, given in degrees and minutes at any point on the ecliptic...

Nautical Astronomy and Celestial Navigation

Nautical Astronomy and Celestial Navigation   Reference library

The Oxford Encyclopedia of Maritime History

Reference type:
Subject Reference
Current Version:
2007
Subject:
History, Military History
Length:
12,412 words
Illustration(s):
6

...day’s declination to ascertain the position of the celestial equator and, hence, latitude. The first written guide for sailors for determining latitude from meridian observations of the sun appeared in Portugal shortly after 1500 . Similarly, Portuguese mariners relied on Abraham Zacuto ’s Almanach Perpetuum ( 1478 ) for declination tables; this work remained popular for another century. Declination tables had been in circulation for about two centuries, in a form first published in 1483 as the Alphonsine Tables. Rules to compute latitude based on adding...

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