Wow! The James Webb Space Telescope is currently at 20 Kelvin! 20 degrees above absolute zero! https://jwst.nasa.gov/webcam.html @NASAWebbpic.twitter.com/Z7vbFIpJVf
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That's still 16K warmer than space :) but that is a pretty big ice chest
The telescope operates at below ~50K, the instruments around 39K, except MIRI at 7K! (Link again: https://jwst.nasa.gov/faq.html#temps )
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Is 20 K the limit of how cold Chamber A will get, or will it go even lower?
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