Next Move 4(Audio)

Asteroids are small stars.

Some asteroids are made of metal.                                          

Our solar system is 45 billion years old.                     

There are millions of asteroids in the solar system.                

Ceres is a large planet.

Some asteroids have the same orbit as Mars.              

It is possible that asteroids were created when the Moon crashed into the Earth.                       

Many kinds of animals disappeared 65 million years ago.                                       

In 1989 a large asteroid nearly hit Earth.                                    

Scientists know that thousands of very large asteroids will hit Earth in the next million years.  

All asteroids have got ice.