AL-ZARQALI (1028 – 1087): “Inventor of a flat astrolabe and water clock”

Al-Zarqali

Al-Zarqali


Name : Abu Ishaq Ibrahim ibn Yahya Al-Zarqali
Title : Arzachel, mathematician and astronomer
Birth : 1028 in Toledo, Castile, Andalusia (Spain)
Death : 1087 in Cordoba, Andalusia
Ethnicity : Andalus (Spanish)
Region : Iberia (Al-Andalus)
Main interests : Mathematics, astronomy
Notable ideas : Invented a flat astrolabe, a device that was ‘universal,’ for it could be used at any latitude, known as the Saphaea in Latin Europe; built a water clock capable of determining the hours of the day and night and indicating the days of the lunar months; wrote a treatise on the construction of an instrument (an equatorium) for computing the position of the planets using diagrams of the Ptolemaic model. His work, Book of Almanac, was translated into Latin by Gerard of Cremona in the 12th century. In the 13th century, King Alfonso X ordered to translate a section of his work entitled “Libros de los laminas de los vii planetas”. A crater in the moon named after his name, Arzachel .
Works : Book of Tables (the Libros del Saber de Astronomia), a compilation of astronomical data of unprecedented accuracy. — Wikipedia; http://www.fact-index.com

Islamia/The Brunei Times
Friday, May 2010

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