Building the Mighty Keck Observatory – Credit: JPL

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In 1985, construction began on what was to become, and still remain, the biggest optical/infrared telescopes on Earth. Since first science in 1993 for Keck I and 1996 for Keck II, the two telescopes are the most scientifically productive telescopes on Earth, publishing more papers per telescope than any of its peers. 

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CIT observers will use LRIS-ADC on Keck 1, and UCD/UCSC observers will use DEIMOS on Keck 2 tonight. Sun set 06:30:00pm rise 06:01:00am
Our guests tonight are observers from CIT and ANU, using LRIS-ADC and DEIMOS respectively. Sun set 06:31:00pm rise 06:00:00am
Aloha Friday! This is from Bo Bleckel shot from Maine. Where's your shot of the night sky? pic.twitter.com/xyj3SP1j3J
Tonight observers from CIT and UCLA will use LRIS-ADC and DEIMOS. Sun set 06:32:00pm rise 06:00:00am