The sects were the followers of the Sun and of the Moon respectively from among the planets. Night and Day: Planetary Sect in Astrology, is aimed at any astrologer who has reasonable knowledge of modern astrology. Contents include case studies, a discussion of the ways in which the various planets change their meanings in day and night charts, and other issues affected by sect such as the computation of the Parts, planetary periods, and calculations involving health and life-expectancy.