NASA Clean Room Gets a Heart-full of Webb (IMAGE) NASA/Goddard Space Flight Center Caption The James Webb Space Telescope's team welcomed back the "heart" of the observatory, known as the Integrated Science Instrument Module or ISIM, to the world's largest clean room at NASA's Goddard Space Flight Center in Greenbelt, Md. After months-long cryogenic testing inside a thermal vacuum chamber, Engineering Technician Mick Wilks inspects ISIM. ISIM will soon house all of Webb's science instruments. More about NASA's Webb telescope: www.nasa.gov/webb Credit Credit: NASA Goddard/Chris Gunn 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.