Webb would require a host of entirely new technologies, and unprecedented amounts of exhaustive testing to ensure it would work as planned once it reached the cold vacuum of space. (scientificamerican.com)
Webb's instruments have already undergone three «cryo - vacuum» tests at Goddard Space Flight Center in Greenbelt, Maryland, to simulate operations in the cold vacuum of space. (science.sciencemag.org)
Life on Earth exploits the difference between the sun and the cold vacuum of space, but what if you flip the temperatures around, with a cold sun and a hot sky? (newscientist.com)