Includes bibliographical references and index.

Top secret : for your eyes only! -- Planets : the basics -- Types of planets -- Our solar system -- Early findings -- Earth myths -- Mars : Earth 2.0? -- Danger zone -- If Earth stopped spinning -- Strange planets -- On the ground.

"Welcome, Agent 359. This file is full of top-secret information about planets. Learn about the different types of planets, what they can be made of, and explore the planets in our solar system. Then, discover what we are learning about planets now. What will you do with your new knowledge? Good luck and remember these are top secret space files!"--

Ages 8-11 Bearport Publishing Company

Grades 4-6 Bearport Publishing Company