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Gemini South

Gemini South's Secondary Mirror Sports Shiny Silver Coat

Secondary Mirror Gemini South
Gemini Observatory Photo/Gustavo Arriagada

The Gemini South secondary mirror passing under a magnetron, which is applying the reflective silver layer, in the vacuum coating chamber during the silver coating process on 9 October 2003.

The Gemini Observatory recently reached an important milestone - successful coating of the secondary mirror on Gemini South with silver. Previously, with aluminum coatings on both primary and secondary mirrors, Gemini's combined emissivity was 3.8%. Reaching this new milestone, we are increasingly confident that achieving our ambitious goal of 2% total telescope emissivity is attainable.

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Adaptive Optics Update

new Announcement of Opportunity

  • R&D in sodium laser technologies for adaptive optics in astronomy
  • Procurement of a 10-20W class sodium laser for the Keck I telescope adaptive optics
  • Procurement of a 50W class sodium laser for the Gemini South adaptive optics

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Gemini Observatory
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950 N. Cherry Avenue
Tucson, Arizona, 85719, USA
Phone: (520) 318-8548
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Hilo, Hawaii, 96720, USA
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