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.
Brief explanations of galaxies, light years, and nebulae. Gives facts about stars--their sizes, density, elements, temperature, movement, and the distances between them.
Presents information on earthquakes, in simple text with illustrations, and discusses how they happen, what their devastating effects can be, where the danger zones are, and what people can do to make themselves safe when they happen.
