Book illustration of Isaac Newton's reflecting telescope — Calisphere
Newtonian Reflecting Telescope (replica) | National Museum of American History
Sir Isaac Newton's reflecting telescope, known also as the Newtonian telescope. It worked by concentrating light by reflection from a parabolic mirror, instead of by refraction through a lens. Newton (1642-1727) first
How many great minds does it take to invent a telescope? | Aeon Ideas