Initial assembly of the WISE cryostat. The cryostat is a 2-stage solid hydrogen dewar that is used to cool the WISE optics and detectors. Here the cryostat internal structures are undergoing their initial vacuum pumpdown. The WISE cryostat was developed by Lockheed Martin Advanced Technology Center, Palo Alto CA.

Image Credit: NASA/JPL-Caltech/LMATC