The activities in this book are designed to reinforce elementary concepts in the study of the universe. General background information, suggested activities, questions for discussion, and answers are provided. Twenty-eight reproducible worksheets are contained in this guide. Topics include: the solar system, orbits, planets, the sun, forces in space, stars, comets, the history of astronomy, electromagnetic radiation, telescopes, spectroscopes, satellites and probes, Voyagers I and II, and the space shuttle. A crossword puzzle on astronomy is included. (CW)