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NASA Goddard Photo and Video posted a photo:

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.



More information: www.nasa.gov/topics/technology/features/webb-osim.html



Credit: NASA Goddard/Chris Gunn



NASA image use policy.



NASA Goddard Space Flight Center enables NASA?s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA?s accomplishments by contributing compelling scientific knowledge to advance the Agency?s mission.



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