11th-century astronomers

Ibn Sina ( – 22 June 1037), commonly known in the West as Avicenna ( ), was a preeminent philosopher and physician of the Muslim world. He was a seminal figure of the Islamic Golden Age, serving in the courts of various Iranian rulers, and was influential to medieval European medical and Scholastic thought.

Persian physicist, mathematician and astronomer (c. 965 – c. 1040)

11th-century Byzantine monk, writer and court official

German 11th-century Benedictine monk

Abū Isḥāq Ibrāhīm ibn Yaḥyā al-Naqqāsh al-Zarqālī al-Tujibi (); also known as Al-Zarkali or Ibn Zarqala (1029–1100), was an Arab maker of astronomical instruments and an astrologer from the western part of the Islamic world.

Egyptian mathematician (c. 950–1009)

Spanish writer, astronomer

Arab qadi of Toledo in Muslim Spain (1029–1070)

Spanish-Arab astronomer in Al-Andalus

thumb|Byrhtferth's diagram with the Four elements (earth, water, air, fire), seasons, solstices, equinoxes, signs of the zodiac and ages of man. An [[Ogham inscription is in the centre. Miniature from the twelfth-century English medieval manuscript MS Oxford St John's College 17, folium 7 verso. Copy from original about 1000 AD by Byrhtferth.]] Byrhtferth (; ) was a priest and monk who lived at Ramsey Abbey in Huntingdonshire (now part of Cambridgeshire) in England. He had a deep impact on the intellectual life of later Anglo-Saxon England and wrote many computistic, hagiographic, and historic

Arab mathematician and astronomer

Andalusian astronomer