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Book of the Alphonsine Tables
A reflection of the knowledge of astronomy of the time, these tables were produced in Spain between 1263 and 1272 under the direction of Isaac ben Sid and Judah ben Moses Cohen. The Ptolemaic belief that the planets orbited the Earth was then the predominant cosmological system, and the heliocentric model of the solar system formulated by Copernicus, who personally studied and copied the tables, was still two centuries away. Known as Alfonsine tables after King Alfonso X of Castile (reigned 1252–84), the tables are a compilation of data ...
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National Library of Spain