A Changing Planet 4 What Are Dwarf Planets 6 How Did the Dwarf 12 Planets Form Where Are the Dwarf Planets 16 Why Do We Study the 20 Dwarf Planets Glossary 22 To Learn More 23 Index 24 Table of COntents
It is August 24 2006 Astronomers vote to change the meaning of a planet They decide planets must orbit a star and be round They must be able to push objects out of their orbits The astronomers decide Pluto is no longer a true planet It becomes one of five smaller dwarf planets The solar system will never be the same again 4 A ChAngIng PlAnet
