1672: Sir Isaac Newton’s reflecting telescope Sketch of Newton’s telescope. Image Source: Library of Congress Washington, D.C. 20540 USA. Digital ID: ...

Sir Isaac Newton invented calculus and explained optics. ... he invented the reflecting telescope, ... such as telescopes, associated with Newton's work.

Isaac Newton's personal copy of the 1717 second edition of Opticks, long thought lost, has been found. ... and built the first practical reflecting telescope, ...

Astronomers have constructed telescopes of every kind - massive observatories designed to pick up faint traces of light across space.

Within sixty years, Isaac Newton had built his own new and improved reflecting telescope with a curved mirror, coated with a fine layer of reflective silver metal, instead of lenses.