With domes standing at the equivalent of eight storeys in height and main mirrors measuring 10m in diameter, these are – individually – the second-largest optical telescopes in the world. Their location atop a 4,200m dormant volcano minimises the effects of clouds and turbulence. Keck I was completed in 1992; Keck II in 1996.
Image: The W. M. Keck Observatory (credit: NASA/JPL)
There are twin telescopes on Mauna Kea, Hawaii.
Astronomers find a way to detect planets around other stars.
Planet hunter Geoffrey Marcy explains how he finds planets around other stars.
Patrick Moore's guest reviews the world's large observatories.
Sir Patrick Moore's guest Professor Richard Ellis from the University of Oxford reviews the world's large observatories and explains their importance. [The black and white images of Edwin Hubble, George Hale, Mount Wilson, the 200-inch telescope and mirror making in this clip are copyright Palomar Observatories/Caltech]
Dr Chris Lintott joins Marcy on his search for extrasolar planets.
The Sky at Night's Dr Chris Lintott joins Dr Geoffrey Marcy on his search for extrasolar planets. Marcy explains how he uses the Keck telescope in Hawaii to search for planets around other stars.
The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii. Both telescopes feature 10 m (33 ft) primary mirrors, currently among the largest astronomical telescopes in use. The combination of an excellent site, large optics and innovative instruments has created the two most scientifically productive telescopes on Earth.