nasagoddard Testing Webb Telescope's OSIM and BIA Instruments - The OTE (Optical Telescope Element) Simulator or OSIM wrapped in a silver blanket on a platform, being lowered down into a vacuum chamber (called the Space Environment Simulator, or SES) by a crane to be tested to withstand the cold temperatures of space. Credit: NASA Goddard/Chris Gunn #nasa #jwst #nasagoddard #space 4y

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