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Visitors can observe celestial objects through historic telescopes such as the Clark Telescope, a 24-inch refracting telescope used extensively for planetary and lunar observations in the past.—The Arizona Republic, 16 Aug. 2023 Based on his theory of color, Newton concluded that refracting telescope lenses would be plagued by chromatic aberrations (the dispersion of light into colors) and built the first practical reflecting telescope, using reflective mirrors rather than lenses as the objective to solve that problem.—Jennifer Ouellette, Ars Technica, 13 Jan. 2023 The Yerkes Observatory in Williams Bay, Wisconsin, is home to the largest refracting telescope in the world.—Dean Regas, The Enquirer, 9 Oct. 2021
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