G. BRAD LEWIS / SCIENCE PHOTO LIBRARY G. BRAD LEWIS / SCIENCE PHOTO LIBRARY
Keck telescope domes. Keck I and II telescope domes on Mauna Kea, Hawaii, USA. The optical telescopes of the American Keck I and II each have a 10 metre diameter mirror, which can be used together to provide more detailed images. Mauna Kea, a dormant 4200-metre-high volcano, has several telescopes on its summit.
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