Calling all budding astronauts and space scientists! Prepare to blast-off on a journey through space with this spectacular guide to the planet Mercury. Planet Mercury is packed with dynamic, full-color photographs and fun, accessible facts about the smallest planet in the solar system. Get ready to discover more about. Why Mercury is the fastest planet of them all How to spot it in the night sky from Earth What created the huge cracks on its surface Why planet Mercury is so heavy . and so much more! One of twelve books in The Explorer's Guide to the Solar System series, Planet Mercury is perfect for young curious minds wanting the up-to-date news about the wonders of space and the incredible celestial objects that call it home!.