Spitzer Exhausts Liquid Helium Coolant
Credit: NASA/JPL-CALTECH
NASA’s Spitzer Space Telescope, which produced thousands of images of the infrared universe, like this one of the Helix nebula, in the past 5.5 years, has used up all of the liquid helium that keeps its detectors cold and will move into its warm observation phase. That means a rise to about -404F...
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