Why are most telescopes reflectors not refractors?

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Tags

1. #aberration
2. #lenses
3. #chromatic
4. #refractors
5. #surface
6. #deform
7. #their
8. #suffer
9. #supported
10. #weight
11. #reflectors
12. #large
13. #telescopes
14. #optical
15. #achromats
16. #mirrors
17. #under
18. #grind
19. #surfaces