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  1. Why are the largest telescopes mirrors and not lenses?
  2. Are there erecting prism for reflector telescopes?
  3. Did nicolas copernicus use telescopes?
  4. How is a space telescope different to other telescopes?
  5. How do telescopes work?
  6. Things that you can see in small telescopes?
  7. How to use bushnell telescopes?
  8. How+do+telescopes+work?
  9. What do radio telescopes detect??
  10. Why are radio telescopes larger than optical telescopes?