The DEUCE (IMAGE) NASA/Goddard Space Flight Center Caption The DEUCE grating, sensitive to ultraviolet, is carefully positioned for bonding into its flight mount. Credit Nicholas Erickson Usage Restrictions None License Licensed content 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.