Geek socs quiz

Last night our team won! Yay!
For anyone interested, below is my round (the first letter of each word is given, and each is space-themed. For those who went to the quiz, #8 has been replaced as previously it was the first half of # 16.) I haven't LJ-cut this post intentionally; so that people may have a go and then leave answers in comments without spoilering others.

i.e. L-S_ _ _ _ = L-Space

1. S_ _ _ _ E_ _ _ _ _ _ _
2. S_ _ _ _ O_ _ _ _ _ _
3. S_ _ _ _; T_ _ F_ _ _ _ F_ _ _ _ _ _ _
4. S_ _ _ _ T_ _ _ _ _ _ _
5. G_ _ _ _ _ Q_ _ _ _
6. S_ _ _ _ O_ _ _ _
7. I_ A G_ _ _ _ _ F_ _, F_ _ A_ _ _
8. S_ _ _ _ I_ _ _ _ _ _ _
9. S_ _ _ _ S_ _ _
10. M_ _ _ _ _ _ F_ _ _ S_ _ _ _
11. S_ _ _ _ _ _ _ _
12. S_ _ _ _ S_ _ _ _ _ _
13. S_ _ _ _-T_ _ _ C_ _ _ _ _ _ _ _
14. S_ _ _ _ _ _ _ _ _
15. H_ _ _ _ _ S_ _ _ _ T_ _ _ _ _ _ _ _
16. H_ _ _ _ _ _ _ _ _ B_ _ _ _ _
17. L_ _ _ I_ S_ _ _ _
18. S_ _ _ _ A_ _ _ _
19. D_ _ _ S_ _ _ _ N_ _ _
20. K_ _ _ _ _ _ S_ _ _ _ C_ _ _ _ _