[1][2] His work Kitāb ṣuwar al-kawākib ("The Book of Fixed Stars"), written in 964, included both textual descriptions and illustrations.

His was the first to attempt to relate the Greek with the traditional Arabic star names and constellations, which were completely unrelated and overlapped in complicated ways.

[4] It has been claimed that he identified the Large Magellanic Cloud,[citation needed] but this seems to be a misunderstanding of a reference to some stars south of Canopus which he admits he has not seen.

[9][10] Al-Ṣūfī published Kitāb ṣuwar al-kawākib ("The Book of Fixed Stars") in 964, and dedicated it to Adud al-Dawla, the ruler of Buwayhid at the time.

[citation needed] Al-Ṣūfī compared Greek constellations and stars as described in Ptolemy’s Almagest with Arabic ones,[12] linking those that were the same.

[6] To allow for the longitudinal placement of the stars within constellations having changed over the eight centuries since the Almagest was written, Al-Ṣūfī added 12° 42' to all the longitudes values provided by Ptolemy.

[citation needed] The Astronomy Society of Iran – Amateur Committee has held international Sufi Observing Competitions in memory of the astronomer.