The first reflecting telescope built by Sir Isaac Newton in 1668 is a landmark in the history of telescopes, being the first known reflecting telescope. It was the prototype for a design that later came to be called the Newtonian telescope.
The first reflecting telescope built by Sir Isaac Newton in 1668 is a landmark in the history of telescopes, being the first known reflecting telescope. It was the prototype for a design that later came to be called the Newtonian telescope.
Source: Wikipedia "Newton's reflector" · CC BY-SA 4.0
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