Abū al-Ṣalt’s works were quoted by several Hebrew authors such as Samuel of Marseille and Profiat Duran (15th century). Part of his scientific work was translated into Latin and into Hebrew; these translations made in the Iberian Peninsula and Southern France, he became well known in Europe. Abū al-Ṣalt’s most important works on astronomy are: (1) Risāla fī al-`amal bi-’l-asṭurlāb (On the construction and use of the astrolabe); (2) Ṣifat `amal ṣafīḥa jāmi`a taqawwama bi-hā jamī` al-kawākib al-sab`a (Description of the construction and use of a single plate with which the totality of the motions of the seven planets can be calculated); (3) Kitāb al-wajīz fī `ilm al-hay’a (Brief treatise on cosmology); (4) a compendium of astronomy that was strongly criticized by Abū `Abd Allāh of Aleppo, one of the most important astronomers of the court of al-Afḍal; (5) Ajwiba `an masā’il su’ila `an-ha fa-ajāba or Ajwiba `an masā’il fī al-kawn wa-’l-ṭabī`a wa-’l-ḥisāb (Solution to the questions posed, or Answer to questions on cosmology, physics, and arithmetic); and, according to Ibn Khaldūn, an Iqtiṣār (Summary) of Ptolemy’s Almagest. [BEA, Comes]