Describes how the sun was formed, how it creates heat, how it affects life on Earth, and its probable life span.
A brief history of astronomy explains the Milky Way's place in the universe and the Earth's place within the Milky Way, and describes the different kinds of galaxies.
Provides a definition of artificial satellites and describes the launch of the first satellite in 1957, the rapid technological development which followed, and the current proliferation of satellites which handle signals for communications, weather, navigation, and espionage.