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Phytron Stepper Motor in James Webb Space Telescope
The James Webb Space Telescope developed by Space Agencies in Europe, USA and Canada is meant to research the oldest galaxies in the universe. On board is a Phytron geared stepper-motor specifically developed for cryogenic applications. The actuator drives the novel cryogenic refocusing mechanism (RMA) in the NIRSpec (Near Infrared Spectrograph).