CONTENTS Planets Our Solar System Mercury Venus 10 Earth 12 Mars 14 Jupiter 16 Saturn 18 Uranus 20 Neptune 22 Dwarf Planets 23 Beyond 23 Planet Quiz 24 Glossary PLANE OUR SOLAR SYSTEM formed f star created the dust The cloud of a comets and other space rocks Tog TS a swirling cloud of dust An exploding turned into a star planets asteroids they make up the solar