Reflecting telescope

A reflecting telescope (reflector) is an optical telescope which uses mirrors to reflect light, rather than lenses to pass light. The British scientist Sir Isaac Newton designed the first reflector circa 1670. He designed the reflector in order to solve the problem of chromatic aberration, a serious degradation in all refracting telescopes before the perfection of achromatic lenses.

See also

• List of largest optical reflecting telescopes
• Large liquid mirror telescope
• Cf. Refracting telescope