(3) 4-6 Story of Science series. These two books provide accurate histories of our understanding of the universe. Both authors trace improvements in the instruments used to observe and study astronomical bodies--from the naked eye to ground and orbiting radio and X-ray telescopes. They also discuss how notable astronomers used the resulting data to assemble coherent theories. Diagrams, archival photos, and reproductions accompany the texts. Bib., glos., ind.

Reviewer: Harry Clement Stubbs