Arabic manuscript on paper, with 21 lines to each page, written in black naskh script. Titles in red, catchword underlined in red ink with different ownerships seals, copied in 942 AH/1535 AD. The book was written in 922 AH/1516 AD, the author died 957 AH/1550 AD which means that this copy was written while the author was alive, with different seal impressions and ownership statements. Supercommentary by Al-Khafri on the memoir on Astronomy by Nasir Al-Din Muhammad bin Al-tusi, a completion of an earlier commentary on Nasir's Memoir by Ali ibn Muhammad Ibn ALi al-Hisayni Al-Jurjai. The book includes four sections which consists of different chapters. The 1st section with two chapters about the basics needed for science and the principles of geometry. The 2nd section with 14 chapters, about the celestial bodies and the shape of the universe, circular cosmos, location of planets, Earth's rotation about itself and the sun, solar system, the moon and its orbits, distances between planets and the moon during solar eclipse and lunar eclipse. The 3rd section with 12 chapters about the shape of the earth, equator, zodiac, day and night, twilight, parts of the day,age of some planets in our solar system. The 4th section with 6 chapters about the cosmic distances, earth surface area, moon distance from the centre of the cosmos, diameter of the moon and the sun, distances of the sun to other planets. The book includes further different drawings and numerous diagrams. Author: Died 957 AH/1550 AD, known as Khafri, was a Persian, religious scholar and astronomer at the beginning of the Safavid dynasty. He wrote on philosophy, religion, and astronomy, the latter including a commentary on al-Tusi and critiques of al-Shirazi.