SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Newton's telescope. Second reflecting telescope designed and built by English astronomer Sir Isaac Newton (1642-1727) in 1671. Newton invented the reflecting telescope in 1668 because he thought that it was impossible to produce a telescope lens that did not produce colour distortions (chromatic aberration). The telescope worked by focusing light using a parabolic mirror. This reflected light back up the 30-centimetre long tube of the telescope to another mirror which reflected it sideways through an eyepiece. This telescope was demonstrated by Newton at a 1672 meeting of the Royal Society, which chose this occasion to elect him into their membership.
Model release not required. Property release not required.