Technicians are inspecting the James Webb telescope, intended to succeed Hubble, for contamination after it has undergone vibration and acoustic testing. This is done at the Goddard Space Flight Center in the dark, by people wielding torches – including special ultra-violet torches, because contamination is easier to spot this way, said NASA. The long exposure ...
from Electronics Weekly http://www.electronicsweekly.com/news/research-news/496096-2017-03/
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