Young readers will want to blast into space with these titles on the planets. Each book includes a description of the planet, a diagram illustrating its place in the solar system, and a history of its exploration. Text is limited to a few sentences per page, preventing readers from becoming overwhelmed. Fact circles pop up with additional details, and labels add information to eye-catching images on each spread. The size of each planet is compared to Earth, except for Mercury, which is compared to the Moon. A final spread of Bonus Facts closes out each title. Glossary terms are bolded, underlined, and defined in a text box on the page, as well as in the glossary. Books and websites for further exploration are recommended. VERDICT A visually appealing series that suits primary science units and elementary libraries.