NASA telescope built in Greenbelt set for 2026 launch

Prince George’s County is about to see one of NASA’s biggest science missions leave a Greenbelt clean room for the launch pad. The Nancy Grace Roman Space Telescope was fully assembled at Goddard Space Flight Center on Nov. 25, 2025, after its two major segments were integrated, and NASA has now set an Aug. 30, 2026 launch date.

That makes Goddard more than a federal campus on the map. It is where engineers, technicians and scientists in Greenbelt have already done the hardest work on a telescope designed to probe dark energy, dark matter, exoplanets and other distant structures, giving the county a direct role in a mission with global scientific reach. The observatory is expected to move to Kennedy Space Center in Florida for final launch preparations in summer 2026.

Roman’s hardware is built for scale. NASA says its Wide Field Instrument has a field of view at least 100 times larger than Hubble’s and will survey the sky up to 1,000 times faster while maintaining similar sensitivity and infrared resolution. Over its five-year primary mission, Roman is expected to measure light from a billion galaxies and find more than 1,000 exoplanets through microlensing surveys, with some NASA materials saying it could reveal more than 100,000 distant worlds.

The timing adds another layer of significance for Prince George’s County. NASA initially described Roman as on track to launch as early as fall 2026, with a required launch-readiness date of May 2027, so the Aug. 30 date would put the mission nearly eight months ahead of schedule. A SpaceX Falcon Heavy rocket is slated to send the observatory about one million miles from Earth, turning a telescope built in Greenbelt into one of the agency’s most ambitious deep-space tools.

NASA renamed the mission in 2020 from the Wide Field Infrared Survey Telescope to honor Nancy Grace Roman, NASA’s first chief astronomer, who was born on May 16, 1925, and died on Dec. 25, 2018. The name fits a mission that carries both a local manufacturing story and a national one, with Greenbelt helping build the hardware that will open a wider window on the universe.