Webb's ISIM Structure Placed into Huge Space Environment System Chamber for Another Cryo Test

Webb Telescope's heart, the Integrated Science Instrument Module (ISIM) along with two science instrumnets mounted on to it, the Fine Guidance Sensor (FGS) and Near-Infrared Imager and Slitless Spectrograph (NIRISS), is placed into the Space Environment Simulator at NASA's Goddard Space Flight Center for cryogenic testing.