Contents The Inner Planets 4 Inner Planet Fact Files Mercury 6 Venus 8 Deadly Venus 10 Exploring Venus 12 Earth 14 Mars 16 The Moons of Mars 18 Exploring Mars 20 Quiz 22 Useful Words 23 Find Out More 23 Index 24
The Inner Planets Mercury Venus Earth and Mars are closest to the Sun Each planet has a blanket of gas around it This is the planet’s atmosphere Mars FACT FILE Where in the Solar System inside a ring of space rocks called the asteroid belt What They Are Made of mainly rock and metal Time to Travel around the Sun Mercury 88 days Venus 225 days Earth 365 days Mars 687 days HOW BIG Earth is the biggest inner planet Mercury Mars Venus Earth
The Inner Planets Mini Facts Earth is the only planet that has life Venus Sun Mercury asteroid belt Earth
