 After logic comes mathematics. For al-Fârâbî mathematical sciences include arithmetic, geometry, optics, astronomy, music, the science of weights and mechanics. Only recently has more attention be paid to this aspect of Farabian thought. Gad Freudenthal (1988) focused on al-Fârâbî’s views on geometry. Except for pointing to al-Fârâbî’s rejection, in contradistinction to al-Kindî, of the validity of what we now call astrology, scholars had neglected his views on astronomy and cosmology. Damien Janos’s Method, Structure, and Development in al-Fârâbî’s Cosmology (2012) has filled this gap. His book throws new light on various aspects of al-Fârâbî’s astronomy, cosmology, and philosophy of nature. It also highlights the link between cosmology and metaphysics. Johannes Thomann (2010–11) pointed to a newly discovered commentary on the Almagest attributed to al-Fârâbî (Ms. Tehran Maglis 6531).