Webb Mirror Testing (IMAGE) NASA/Goddard Space Flight Center Caption The mirrors were cryogenically tested by Ball Aerospace at the X-ray and Cryogenic Facility, at Marshall Space Flight Center. Credit NASA/MSFC/Emmett Givens 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.