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• n  optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece

• reflector

News & Articles

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• This Simple Disc of Metal Helped Change Science Forever
  It might not look much, but this small disc of metal helped shape science—because it was the primary mirror in Sir Isaac Newton's original reflecting telescope. Read more...        
  Feb. 7, 2014 - Gizmodo