<p style='text-align: justify;'>An astronomical treatise by Abraham b. ʿAnzar(?) on the seven planets and the model of the Universe. Mentions Hipparchus, Ptolemy, Abraham bar Ḥayya, Copernicus and the philosopher Abū Bakr b. al-Ṣāyiḡ (ibn Bajja), whose book the author read with a Muslim.</p>