Together with Ulugh Beg, al-Kāshī and a few other astronomers he produced the "Zij-i Sultani", the first comprehensive stellar catalogue since Ptolomy, containing the positions of 992 stars.
Together with Ulugh Beg, al-Kāshī and a few other astronomers he produced the "Zij-i Sultani", the first comprehensive stellar catalogue since Ptolomy. The first comprehensive stellar catalogue since Ptolomy was containing the positions of 992 stars.