Why do we need to use telescopes that are sensitive to other types of radiation?

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Tags

1. #visible
2. #detection
3. #objects
4. #study
5. #otherwise
6. #telescopes
7. #light
8. #region
9. #sensitive
10. #allowing
11. #devices
12. #astronomers
13. #entire
14. #invisible
15. #other
16. #spectrum
17. #electromagnetic
18. #wavelengths
19. #radiation