These popular lectures devote much space to the astronomy of the Babylonians, as shown by recent archeological research, discuss the origin and development of sidereal myths and astrology, and trace their effect through Greek and Roman religion. Some extremely interesting comment is made on the influence of astrology on Christianity and its final survival in the doctrine of determinism in the Occident and fatalism in the Orient. The style in translation is clear and no more than common knowledge of astronomy or ancient history is presupposed.