THE UNIVERSE AND SPACE EXPLORATION
A. The Universe
1. galaxy
2. star
3. constellation
a. The Big Dipper
b. The Little Dipper
B. The Solar System
4. sun
5. moon
6. planet
7. solar eclipse
8. lunar eclipse
9. meteor
10. comet
11. asteroid
12. Mercury
13. Venus
14. Earth
15. Mars
16. Jupiter
17. Saturn
18. Uranus
19. Neptune
20. Pluto
C. Space Exploration
21. satellite
22. (space) probe
23. space craft/orbiter
24. space station
25. astronaut
26. space suit
27. rocket
28. launch pad
29. space shuttle
30. booster rocket
31. mission control
32. U.F.O./Unidentified Flying Object/ flying saucer