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Tomb of Omar Khayyám, Neishapur, Iran.
The man known in English as the poet Omar Khayyám (May 18 1048 - December 4 1123, assumed dates) was born in Nishapur (or Naishapur) in Khorasan, Persia (Iran), and named Ghiyath al-Din Abu'l-Fath Umar ibn Ibrahim Al-Nisaburi al-Khayyami (al-Khayyami means "the tentmaker"). His name in Persian is "عمر خیام".
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Omar Khayyam the mathematician

He was famous during his lifetime as a mathematician and astronomer who calculated how to correct the Persian calendar. On March 15, 1079, Sultan Jalal al-Din Malekshah Saljuqi (1072-1092) put Omar's corrected calendar into effect, as in Europe Julius Caesar had done in 46 B.C. with the corrections of Sosigenes, and as Pope Gregory XIII would do in February 1552 with Aloysius Lilius' corrected calendar (although Britain would not switch from the Julian to the Gregorian calendar until 1751, and Russia would not switch until 1918).

He is also well known for inventing the method of solving cubic equations by intersecting a parabola with a circle.

Omar Khayyam the astronomer

In 1073, the Malik-Shah, ruler of Isfahan, invited Khayyám to build and work with an observatory, along with various other distinguished scientists. Eventually, Khayyám very accurately (correct to within six decimal places) measured the length of the year as 365.24219858156 days.

He was famous in Persian and Arab world for his astronomical observations. He built a (now lost) map of stars in the sky.

Omar Khayyam and Islam

The philosophy of Omar Khayyam was quite different from official Islamic dogmas. He agreed with the existence of God but objected to the notion that every particular event and phenomenon was the result of divine intervention. Instead he supported the view that laws of nature explained all particular phenomena of observed life. Religious officials asked him many times to explain his different views about Islam. Khayyam eventually made a hajj [pilgrimage] to Mecca in order to prove he was a faithful follower of the religion.

Omar Khayyam the writer and poet

Hollywood depiction of Omar Khayyam.
Hollywood depiction of Omar Khayyam.

Omar Khayyám is famous today not for his scientific accomplishments, but for his literary works. He is believed to have written about a thousand four-line verses. In the English-speaking world, he is best known for The Rubáiyát of Omar Khayyám in the English translations by Edward Fitzgerald (1809-1883).

Other people have also published translations of some of the rubáiyát (rubáiyát means "quatrains"), but Fitzgerald's are the best known. Translations also exist in languages other than English.

See major article: The Rubáiyát of Omar Khayyám

See also: Persian literature

Miscellaneous

See also

External links

da:Omar Khayyám de:Omar Chayyām es:Omar Khayyam eo:Omar KAJJAM fr:Omar Khayyam it:Omar Khayyam kw:Omar Khayyám nl:Omar Khayyam ja:ウマル・ハイヤーム pl:Omar Chajjam sl:Omar Hajam uk:Омар Хаям zh:欧玛尔·海亚姆 he:עומר כיאם

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