Gibbons uses brief declarative sentences to describe the sun and each planet of the solar system in succession, introducing concepts such as a day, a year, orbit, and rotation. Her paintings sometimes tread the edge of oversimplicity; in a demonstration of day and night, there is almost no contrast between the planet's light and dark sides, and though she mentions in the text that Pluto is currently closer to the sun than Neptune, their orbits do not cross in the illustrations. Still, the bright colors, simplified shapes, and spacious, uncomplicated page design make this an inviting gateway to the subject. The book closes with an introduction to astronomy, creating a natural transition to the author's Stargazers (Holiday, 1992). John Peters, New York Public Library Copyright 1993 Reed Business Information, Inc.