Ball Aerospace Technician Robin Russell inspects the Webb Telescope Aft Optics Subsystem during mirror integration activities. The Aft Optics bench, made of lightweight beryllium like the mirrors, holds Webb's tertiary and fine steering mirrors. The installed, gold-coated tertiary mirror can be seen in the background.
The Aft Optics bench is the black piece that juts out of the center of the primary mirror visible in this illustration: www.flickr.com/photos/nasawebbtelescope/4809439597/in/set...
Credit: Ball Aerospace
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Read more: www.nasa.gov/mission_pages/webb/news/aft-optics.html
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Caption: JWST's gold-coated flight tertiary mirror. The tertiary mirror goes in the Aft Optics Subsystem, which sits at the center of JWST's giant primary mirror. Dan Patriarca, President of Quantum Coating Incorporated, is in the photo.
Credit: Ben Gallagher (Ball Aerospace) and Quantum Coating Incorporated.
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