Why are most large telescopes reflecting telescopes?

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Tags

1. #atmosphere
2. #orbit
3. #large
4. #telescopes
5. #light
6. #reflectors
7. #produce
8. #reflecting
9. #clearer
10. #through
11. #telescope
12. #based
13. #quality
14. #above
15. #space
16. #images
17. #optical
18. #mirror
19. #earth
20. #glass