Book excerpt: Circling the heavens is a belt of rock and dust. Lying between Mars and Jupiter and orbiting our sun, The Main Asteroid Belt was once thought to be the remnants of an exploded planet or the beginnings of a planet that never formed. How much do you know about asteroids? Can you answer these questions: Where is The Main Asteroid Belt? How many asteroids are there in The Main Asteroid Belt? What was the first asteroid discovered? How much mass does The Main Asteroid Belt have? How fast do asteroids travel? Find out the answers to these questions and more and amaze your family and friends with these fun facts. Ages 8 and up. All measurements in American and metric. The Educational Version has activities that meet Common Core Curriculum Standards. LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.