Nastulus

Muḥammad ibn ʿAbd Allāh Nasṭūlus
Scientific career
Influencesal-Khwarizmi, al-Battani
InfluencedMariam al-Asturlabi

Muḥammad ibn ʿAbd Allāh Nasṭūlus (or Basṭūlus) was a notable 10th-century astronomer and astrolabist. He is known for making the oldest surviving astrolabe, dated 927/928 AD.[1] Another partially preserved astrolabe that bears his signature, "Made by Nasṭūlus in the year 315" of hijra (925 AD), contains the earliest known geographical list on an instrument.[1][2]

Very little is known about his life. His full name, based on a testimony given by a contemporary astronomer Abu Sa'id al-Sijzi, indicates that he was a Muslim.[1] But some modern historians have suggested that his foreign last name may indicate that he was Greek or Nestorian.[1]

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