Introduction i
  How to Use This Program iii
1. What is astronomy? 12
2. Who were the first astronomers? 16
3. What are stars? 20
4. What is the Sun? 22
5. What are galaxies? 24
6. What is the solar system? 28
7. What do we know about Earth? 32
8. What do we know about the Moon? 36
9. What is an eclipse? 40
10. What do we know about Mercury? 44
11. What do we know about Venus? 46
12. What do we know about Mars? 50
13. What do we know about the asteroid belt? 54
14. What do we know about Jupiter? 56
15. What do we know about Saturn? 58
16. What do we know about Uranus? 60
17. What do we know about Neptune? 62
18. What do we know about Pluto? 64
19. What are comets? 68
20. What are meteroids, meteors, and meteorites? 70
21. When did people begin space explorations? 74
22. What is the space shuttle? 76
23. What are satellites, space probes, and the Hubble Telescope? 78
24. What do we know about life in space? 80
  Assessment 82
  Lots of Science Library Books 85
  Graphic Pages 147

Back