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Keck telescope

The W.M. Keck telescopes are the two biggest telescopes in the Mauna Kea Observatory[?]. They are located on Mauna Kea[?] peak on Hawaii at an altitude of 4,145 m (13,600 ft). With their 10 m (33 ft) mirrors they are the largest telescopes in the world. The Keck I started observing in 1993 and the Keck II in 1996. It is a Ritchey-Chrétien type of telescope on an altazimuth mount[?].

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