Planet Mercury

Humans have long been fascinated by space exploration, from the earliest NASA probes to the latest journeys toward the distant edges of the solar system. Readers will learn about the discovery of new stars and planets, the ways celestial bodies are formed, and much more. <p> Features: Engaging sidebars highlight important space discoveries Timelines illustrate the ways our knowledge of space has changed over time Glossaries explain difficult scientific terms in a way that makes them easy to understand Eye-catching images give readers an up-close look at the far reaches of space www.factsfornow.scholastic.com</p>