 It is remarkable that, qua theoretical field, Sextus examines astrology rather than astronomy. The latter would make for a more typical sequence: apart from the fact that in Sextus, logic is considered part of philosophy rather than a “discipline,” the six fields otherwise correspond to the so-called trivium of grammar, logic, and rhetoric and quadrivium of arithmetic, geometry, astronomy, and music theory. Sextus’ attention to astrology rather than astronomy highlights a deep feature of his philosophy (Corti 2015, Bett 2018). Astronomy, from Sextus’ point of view, is concerned with appearances; and hence there is a sense in which the skeptic does not object to it. Astronomy, then, is the “version” of astrology that skeptics can admit into their adherence to ordinary life (M 5.1–3). Presumably, astronomy is concerned with predicting things like droughts, floods, earthquakes, and plagues based on appearances. Astrology, on the other hand, is concerned with matters of great obscurity.