1 Earthrise 1
2 In the beginning 3
3 All about stars 7
4 The Sun 10
5 All about planets 16
6 Mercury and Venus 20
7 The Earth and the Moon 23
8 Mars 32
9 Giants of gas and ice 38
10 Comets and meteors 46
11 Distant moons 49
12 Other life in space 53
GLOSSARY 57
ACTIVITIES: Before Reading 60
ACTIVITIES: While Reading 61
ACTIVITIES: After Reading 65
TRANSLATION 参考译文 68
