astronomyblog: The W. M. Keck Observatory i…

astronomyblog:

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.

images: Keck ObservatorySarah ElliottVadim Kurland