In this presentation I will revisit one of the oldest Andalusî astronomical sources to have come down to us: the Kitâb al-hay’a, written in the tenth century by the Cordoban author Qâsim b. Mutarrif al-Qattân. The text, preserved in the Süleymaniye Library in Istanbul (Carullah Efendi 1279, folios 315r–321v) is organized in 30 chapters, and their contents can be arranged in three different groups: (1) Materials with some kind of practical utility, related to astrological purposes, religious worship, measure of time, calendar, or certain elements of meteorology; (2) Materials which are more closely linked with mathematical astronomy, a field which dramatically evolved in eleventh-century al-Andalus; (3) Materials dealing with the physical structure of the universe. On the whole, this work is a representative example of the sort of astronomy that was practiced in al-Andalus in that day and age. Several parts of it have been studied some time ago. However, other parts still await for a deeper investigation to determine their significance, as they are the first evidences of the introduction into al-Andalus of a range of scientific traditions. We find in the Kitâb al-hay’a materials coming from the ancient Greek, Babylonian and Indian sources that had been compiled in the Islamic East, together with some elements of an old Latin tradition. These last elements, which were probably in use in the Iberian Peninsula, have a major interest because they may help us to understand, in some fashion, the special character which the astronomical research conducted in al-Andalus would later acquire.