"Two stories of explorers named Galileo reveal fascinating details of scientific discovery. The first is about Galileo's discovery of Jupiter's four main moons in 1610. The second story tells about the exploration by an unmanned spacecraft named 'Galileo' from 1995 to 2003"--P. [3] of cover.

Two Galileos -- A revolutionary scientist -- A Galileo for the space age -- Learning secrets of a gas giant -- Exploring the Galilean moons -- Looking to the future -- Glossary -- Index.