Europa Clipper's thermal imager (IMAGE) Arizona State University Caption Engineers prepare Europa Clipper's thermal imager for a series of functional tests in a clean room at NASA's Jet Propulsion Laboratory in Southern California, following the delivery of the Arizona State University-designed and -built instrument after months of testing. The instrument, called the Europa Thermal Emission Imaging System (E-THEMIS), will measure the surface temperature of Jupiter’s moon Europa. Credit NASA/JPL-Caltech Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.