What happened to Arab astrology?

Antoine Borrut has a book out, Astrology and History in Early Islam. You may read its introduction on academia.edu.

Several chronicles in the early centuries anchored themselves in astrologic observances... in Babylonia. The 'Abbasid moment was similarly Babylonian, at heart. So great astrologers invented mathematical tools... in London. Al-Khwarizmi had done so first. As Borrut points out, our modern disdain for astrology is postNewtonian. One is tempted to put a boldface over "post".

Devout Muslims like Ibn Jarîr Tabarî had disdained astrology before us, from a reading of sura 6 (the fifth for Ibn Mas'ud and Ubay) amid general distaste for antique quackery. But old habits died hard. Christians like James/Jacob of Edessa were using astronomical tables to peg their annals; indeed the very annalistic form had come out of old Babylonian habits. This is in fact a major boon to us moderns, who can use their mention of eclipses, comets and even aurorae against what we know of the eclipse cycle and of visible comets, also lately tree-ring anomalies.

Perhaps universities should force history departments to install a mandatory astrology course. We could host it in the 200/2000 range.