Origins & Early Life

Abu al-Hasan 'Ali ibn Abi al-Said 'Abd al-Rahman ibn Ahmad ibn Yunus ibn Abd al-'Ala al-Sadafi al-Misri (Arabic: ابن يونس; c. 950 – 1009) was an Arab and Egyptian astronomer and mathematician,. The Fatimids gave him gifts and established an observatory for him on Mount Mokattam near Fustat. Al-Aziz Billah ordered him to make astronomical tables, which he completed during the reign of Al-Hakim bi-Amr Allah, son of Al-Aziz, and called it al-Zij al-Kabir al-Hakimi.

Pivotal Works & Achievements

The crater Ibn Yunus on the Moon is named after him. Information regarding his early life and education is uncertain. He was born in Egypt between 950 and 952 and came from a respected family in Fustat belonging to the Yemeni Arab tribe of Sadaf, a branch traditionally traced to Ḥimyar. His father was a historian, biographer, and scholar of hadith who wrote two volumes about the history of Egypt, one about the Egyptians and one based on traveller commentary on Egypt. A prolific writer, ibn Yunus' father has been described as "Egypt's most celebrated early historian and first known compiler of a biographical dictionary devoted exclusively to Egyptians".

Enduring Legacy & Impact

His grandfather was also a scholar who specialized in astronomy...

Contemporary Figures & Related Historical Timelines

• Abhinavagupta — Contemporary (Born in 950) (950): Polymathic philosopher and aesthetician from Kashmir, influential in Indian culture.
• Al-ʻIjliyyah — Contemporary (Born in 950) (950): 10th-century Syrian mathematician and astrolabe maker from Aleppo.
• Erik the Red — Contemporary (Born in 950) (950): Pioneering Norse explorer credited with founding the first European settlement in Greenland.
• Basil II — Contemporary (Born in 958) (958): Byzantine Emperor, known as the Bulgar Slayer, who reigned from 976 to 1025.
• Yusuf ibn Tashfin — Historical peer (Born in 1009) (1009): Almoravid leader who secured Islamic rule in al-Andalus and the Maghreb.
• Al-Farabi — Contemporary figure (Died in 951) (951): Pioneering Islamic philosopher, theorist, and 'Father of Islamic Neoplatonism'
• Gregory of Narek — Contemporary figure (Born in 951) (951): Armenian mystical poet, theologian, and author of the Book of Lamentations.
• Rajaraja I — Contemporary figure (Born in 947) (947): Great Chola Emperor who expanded the empire across South India and the Indian Ocean.
• Al-Karaji — Contemporary figure (Born in 953) (953): Pioneering 10th-century Persian mathematician and engineer who advanced algebra.
• 950 Historical Timeline & Archive — Explore world events and figures from 950
• 958 Historical Timeline & Archive — Explore world events and figures from 958