Spotlight on Webb Telescope Test

NASA photographer Desiree Stover, dressed in a clean room suit, shines a light on the Space Environment Simulator’s Integration Frame, inside the thermal vacuum chamber at NASA‘s Goddard Space Flight Center in Greenbelt, Md. Image © NASA

Shortly after, the chamber was closed up and engineers used this frame to enclose and help cryogenic (cold) test the heart of the James Webb Space Telescope, the Integrated Science Instrument Module.

source NASA