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The William Kwong Yu Yeung Telescope (WKY Telescope) is a 1.8-meter optical telescope located at Mauna Kea Observatory in Hawaii, USA. The telescope is named after William Kwong Yu Yeung, a Chinese-American astronomer who was a pioneer in the field of infrared astronomy. The WKY Telescope is used for a variety of astronomical research, including studies of star formation, galaxies, and the solar system.