Keck I and II telescopes on Mauna Kea, Hawaii

Keck I and II telescopes on Mauna Kea, Hawaii

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Credit: DR FRED ESPENAK/SCIENCE PHOTO LIBRARY

Caption: The Keck telescopes. The Keck I (right, white) and Keck II telescopes on the dormant volcano Mauna Kea in Hawaii. Keck I was completed in April 1992, but its twin will not be operational until the end of 1996. They are the largest optical telescopes in the world. Each has a main mirror made of 36 1.8 metre hexagonal mirrors, forming a unique sur- face with a total diameter of 10 metres. Each of the 36 mirrors has a specific shape and is mounted on computer-controlled motors that maintain its correct position during use. Keck I and II will be used together as an optical interferometer, where the signals received by the two telescopes are combined in a computer for improved accuracy.

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Keywords: astronomy, astrophysics, hawai'i, hawaii, i and ii, keck i and ii, keck telescope, mauna kea, optical telescope, telescope, usa

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