Describes the general characteristics of comets and gives a brief history of Halley's comet discussing its expected reappearance in late 1985-early 1986.
Discusses the characteristics of Saturn and how information about it has been gathered from ancient times to the present day when the Voyager probes sent back a series of photographs of the ringed planet.
Presents facts about the large, gaseous planet, from its discovery to the latest findings from the Voyage II space probe which passed by Neptune in 1986.
Describes in simple terms the meteors, comets, and asteroids that are part of our solar system and discusses the various theories concerning their origin and their effect on life on Earth.