Alien planets.
- Chicago, IL : World Book, c2010.
- 64 p. : ill. (chiefly col.), col. maps ; 27 cm.
- Explore the universe .
- Explore the universe. .
Includes bibliographical references (p. 62) and index.
"An introduction to extrasolar planets, with information about their formation and characteristics. Includes diagrams, fun facts, a glossary, a resource list, and an index"--Provided by publisher.