The Nancy Grace Roman Space Telescope, NASA's next great observatory, has been completed at the Goddard Space Flight Center in Greenbelt, Maryland. The telescope, named for NASA's first chief of astronomy and the first woman to hold an executive position at the agency, is set to launch in 2025. It will be joined by its spacecraft and telescope assemblies in the facility's largest clean room. The new observatory's primary mirror measures about 7.9 feet (2.4 meters) wide, similar to Hubble's, and its ability to take images that capture a patch of the sky at least 100 times larger than Hubble can. Once fully operational, Roman should be able to create 500 terabytes of data per year. It is specifically designed to capture images of in visible and near-infrared light, unlike other telescopes that focus on infrared.