Exposed To Temperatures As Low As 40 Degrees Kelvin
An engineering team lifted and lowered the heart of NASA's James Webb Space Telescope into the giant thermal vacuum chamber at NASA's Goddard Space Flight Center in Greenbelt, Maryland. This move marks the start of the third and final cryogenic test at Goddard to prepare the Integrated Science Instrument Module (ISIM), or the “heart” of the telescope, for space.