Spinning Through Space: Comets And Asteroids

There are hundreds and thousands of objects spinning through space. Some of these objects are asteroids - large rocks billions of years old. They may be the only remains of distant planets that exploded, or maybe they were left over at the birth of the universe - their origin is an unsolved mystery.

Some of the rocks visit Earth's skies, creating streaks of light across the night sky. Comets with their beautiful misty tails are a rare sight - they travel far across the solar system. Meteors, or shooting stars, are more common. Open this book to read more about these fascinating objects and their encounters with Earth.