PARIS —NASA says the $8.8 billion James Webb Space Telescope (JWST) program is on track to run a series of environmental tests this summer on key instruments, with plans to begin a final three-month cyro-vacuum test of the JWST’s Integrated Science Instrument Module (ISIM) this summer. The program’s ISIM team says it has overcome a series of challenges plaguing all four of the module’s instruments, as well as a cryocooler subsystem that supports the Mid-Infrared ...


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