Paintings from Bijapur in the sixteenth century have a richly illustrated encyclopaedia known as the Nujum al-Ulum dated 1570.
The school of Bijapur was patronised by Ali Adil Shah I (1558–1580) and his successor Ibrahim II (1580–1627), both patrons of art and literature. The latter was also an expert in Indian music and author of a book on this subject, Nauras-nama. He was the owner of Nujum al-Ulum manuscript and might have commissioned the Ragamala series in the 1590s. Bijapur had a close connection with Turkey and astronomical illustrations in Nujum al-Ulum may have been derived from Ottoman Turkish manuscripts.

What is the possible source of inspiration for astronomical illustrations in the Nujum al-Ulum manuscript, according to the passage?

Ottoman Turkish Manuscripts

Answer: Ottoman Turkish Manuscripts
The passage suggests that the astronomical illustrations in the Nujum al-Ulum manuscript may have been derived from Ottoman Turkish manuscripts.

Paintings from Bijapur in the sixteenth century have a richly illustrated encyclopaedia known as the Nujum al-Ulum dated 1570.
The school of Bijapur was patronised by Ali Adil Shah I (1558–1580) and his successor Ibrahim II (1580–1627), both patrons of art and literature. The latter was also an expert in Indian music and author of a book on this subject, Nauras-nama. He was the owner of Nujum al-Ulum manuscript and might have commissioned the Ragamala series in the 1590s. Bijapur had a close connection with Turkey and astronomical illustrations in Nujum al-Ulum may have been derived from Ottoman Turkish manuscripts.