Webb Telescope's Fully Integrated 'Heart'

[Waspie_Dwarf]

Webb's Fully Integrated 'Heart' Lowered into the Chamber

Engineer Jack Marshall held his breath. The "heart" of the James Webb Space Telescope hung from a cable 30 feet in the air as it was lowered slowly into the massive thermal vacuum chamber at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

This "heart" of Webb is called the ISIM or Integrated Science Instrument Module, which along with its thermal vacuum test frame and supporting hardware, weighs about as much as an elephant. Within this test frame, ISIM sits inside a big-mirrored cube of cryo-panels and blankets. This process can be seen in a video by a Goddard videographer.

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[Waspie_Dwarf]

JWST ISIM Structure moves into SES for Second Cryogenic Test

Engineers move the heart of the Webb Telescope holding all four science instruments out of the clean room at NASA's Goddard Space Flight Center and into the huge Space Environment Simulator for several months of testing at temperatures reaching 20 Kelvin or -425 Fahrenheit.

Credit: NASA's Goddard Space Flight Center

Source: NASA Goddard - Multimedia