Roman WFI in Ball thermal vacuum chamber (IMAGE) NASA/Goddard Space Flight Center Caption After completing final integration, Ball Aerospace technicians transport the Nancy Grace Roman Space Telescope's Wide Field Instrument (WFI) into Ball’s largest thermal vacuum chamber to begin environmental testing at a Ball facility in Boulder, Colorado. Credit Ball Aerospace 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.