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[?].