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The Great Contribution of Islamic Astronomers

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Bianca
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« Reply #15 on: August 31, 2007, 08:40:32 pm »








Interest in mathematics, astronomy, and medicine was always lively, however, because of their obvious utility—mathematics for commercial purposes, computation of the rather complicated Islamic laws of inheritance, and as a basis for measuring distances. Astronomy was useful for determining the times of prayer and adjusting the calendar, and the study of medicine needed no apology. The introduction of the new Aristotelian ideas, however, even in Arab dress, aroused a certain amount of suspicion in the conservative West, and it was some time before public opinion would accept that Aristotelian logic did not conflict with the revelation of Islam.

Part of the suspicion with which certain of the ideas emanating from the scholars of the Abbasid court were viewed was due to an inadequate distinction between sciences and pseudo-sciences. This was a distinction which the Muslims made at a much earlier date than western scholars, who, even during the Renaissance, tended to confound astronomy with astrology, chemistry with alchemy. Ibn Hazm, a leading Andalusian scholar of the 11th century and staunchly conservative, was very outspoken on this point. People who advocated the efficacy of talismans, magic, alchemy, and astrology he calls shameless liars. This rational approach did much to make Islam preeminent in the natural sciences.

The study of mathematics and astronomy went hand in hand. Al-Khwarizmi’s famous book entitled The Calculation of Integration and Equation reached al-Andalus at an early date, and became the foundation of much later speculation. In it, Al-Khwarizmi dealt with equations, algebraic multiplication and division, measurement of surfaces and other questions. Al-Khwarizmi was the first to introduce the use of what he called “Indian” and we call “Arabic” numerals.

The exact method of transmission of these numerals—and the place-value idea which they embodied—is not known, but the symbols used to represent the numbers had slightly different forms in eastern and western Islam, and the forms of our numerals are derived from those used in al-Andalus. The work of al-Khwarizmi, which now only survives in a 12th-century Latin translation made in Spain, together with a translation of Euclid’s Elements, became the two foundations of subsequent mathematical developments in al-Andalus.
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