Describes the properties and observations of comets, meteors, and asteroids and explores how scientists use these phenomena to learn more about the universe
Discusses efforts to find intelligent life on other planets and theories on this topic and describes UFO sightings and other phenomena that are given as evidence of extraterrestrial visitors among us.
Describes the history and development of space stations and the exploration of our solar system, as well as the possibility of some day traveling to distant stars