Discusses scientific findings about the moon's mass, density, gravity, temperatures, lack of atmosphere, eclipses, orbit, surface, and effect on tides with a section on superstitions.
Describes the structure of the Milky Way galaxy and how information is compiled about its stars and planets. Also discusses the theories and contributions of such early astronomers as Ptolemy, Galileo, and Newton.
An explanation of the nature of the electromagnetic spectrum, the scientific investigations that led to our understanding of it, and its role as a tool of science.
