kept in the Bodleian Library, dates to 1009 and is allegedly the work of the author's son, though this is disputed. There is a thirteenth-century copy in the British Library (Or. 5323). He has the earliest known descriptions and illustrations of what he called "a little cloud", which is actually the Andromeda Galaxy. He mentions it as lying before the mouth of a Big Fish, an Arabic constellation. This "cloud" was apparently commonly known to the Isfahan astronomers, very probably before 905, and al-Sufi attributes their discoveries in the text. This was the first galaxy to be observed, as distinct from a star cluster. It has been claimed that the first recorded mention of the Large Magellanic Cloud was given in the Book of Fixed Stars but this seems to be a misunderstanding of a reference to some stars south of Canopus which he admits he has not seen. He probably also cataloged the Omicron Velorum star cluster as a "nebulous star", and an additional "nebulous object" in Vulpecula, a cluster now variously known as Al-Sufi's Cluster, the "Coathanger asterism", Brocchi's Cluster or Collinder 399. The book has been translated into French by Hans Schjellerup in 1874 and into English by Ihsan Hafez. Editions Text and French translation of Ṣūfī's introduction by J. J. A. Caussin de Perceval in Notices et extraits des manuscrits XII, Paris, 1831, pp. 236f. H.C.F.C. Schjellerup, Description des étoiles fixes par Abd-al-Rahman al-Sûfi, St. Petersburg, 1874. Complete French translation from two late mss., with selected portions in Arabic. Ketāb ṣowar al-kawākeb al-ṯābeta, edited from five mss., and accompanied by the Orǰūza of Ebn al-Ṣūfī, Hyderabad, India, 1954 (introduction by H. J. J. Winter). Facsimile edition of the Persian translation by Naṣīr-al-dīn Ṭūsī (Ayasofya 2595, autograph, from Uluḡ Beg's library), Tehran, 1348 Š./1969. Critical edition of Ṭūsī's translation by Sayyed Moʿezz-al-dīn Mahdavī, Tehran, 1351 Š./1972. The star nomenclature of the Castilian version, and of an Italian translation made from Castilian, was critically edited by O. J. Tallgren, "Los nombres árabes de las estrelas y la transcripción alfonsina", in Homenaje a R. Menéndez Pidal II, Madrid, 1925, with 'Correcciones y adiciones' in Revista de filología española 12, 1925, pp. 52f. The Italian translation was edited by P. Knecht, I libri astronomici di Alfonso X in una versione fiorentina del trecento, Saragossa, 1965. English translation; Hafez, Ihsan (2010) Abd al-Rahman al-Sufi and his book of the fixed stars: