NASA | Webb Space Telescope Integrated Science Instrument Module begins Final Cryogenic Test

Engineers place the heart of the James Webb Space Telescope into the Space Environment Simulator, a giant thermal vacuum and cryogenic testing chamber, at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. This video is public domain and can be downloaded at: You can find out more information at: Like our videos? Subscribe to NASA’s Goddard Shorts HD podcast: