Continuity and Change

Abstract

a numerical relationship (Bode's Law). The visible stars, largely aggregated in a circumferential view as the " milky way," are a teeming multitude in various stages of evolution, self-luminous. They are suns, perhaps with non-luminous worlds rotating round them. The spectra of the stars comprise three groups : (i) Those in which hydrogen, helium, and magnesium are prominent, hydrogen predominating in