Telescope “James Webb” passed cryogenic testing at -233 degrees Celsius
In the Space center Johnson (Texas, USA) completed cryogenic testing of an orbital telescope “James Webb”. As the portal Space.com within 90 days the unit was in a closed vacuum cryogenic chamber with a constant temperature of -233 degrees Celsius. Cooling in the chamber was supported by two contours: the outer was filled with liquid nitrogen and the inner liquid helium.
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