Describes the orbit, rotation, temperature, and surface formations of the planet Mercury and the probe Mariner X that took pictures of it in 1974 and 1975.
- ISBN10 0516264362
- ISBN13 9780516264363
- Publish Date 30 September 1999 (first published 1 September 1998)
- Publish Status Active
- Out of Print 13 March 2021
- Publish Country US
- Imprint Children's Press
- Format Paperback
- Pages 47
- Language English