As the W. M. Keck Observatory in Hawai'i celebrates its 20th year of operations this week, we look back at a handful of views from the famous twin telescopes.
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Cosmic Hotshots from Keck Observatory: Photos
As the W. M. Keck Observatory in Hawai'i celebrates its 20th year of operations this week, we look back at a handful of views from the famous twin telescopes.
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