After successfully launching and maneuvering the spacecraft, JWST researchers still have months of prep work to do before they can start taking pictures.
. NIRCam’s detectors can work when they’re slightly warmer than the others, but to function properly, all of the infrared instruments on board have to be cooled down to extremely frigid temperatures.
That’s a major advantage over Spitzer, whose instruments depended on its supply of cryogen, a liquid helium coolant that ran out in 2009. NASA continued to use the space telescope for a few years after that, during the “warm Spitzer mission,” but its mid-infrared detectors were no longer viable.Illustration: NASA
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