NASA Completes Roman Space Telescope Despite Budget Threats

NASA's Nancy Grace Roman Space Telescope Complete

The space observatory, designed for a wide range of missions, is set to launch in 2027.

December 17, 2025

NASA has completed construction of a new space telescope, the agency announced. The Nancy Grace Roman Space Telescope—named after the space agency's first chief astronomer—will search for clues about dark matter, among other objectives, with its launch scheduled for 2027.

Engineers at Goddard Space Flight Center in Greenbelt, Maryland, have installed the telescope's 2.4-meter primary mirror and its two scientific instruments onto the payload module, NASA confirmed. The next step is integrating the payload with the spacecraft itself. Just months ago, the project appeared at risk due to U.S. government budget cuts.

The spacecraft includes power, communication, and support systems. Jody Dawson, the telescope's systems engineer, said she expects integration to be finished before the end of the year. "We're in the middle of an incredibly exciting phase of mission preparation," she noted.

Roman's primary mirror matches the size of the Hubble Space Telescope's—2.4 meters in diameter—but is significantly smaller than the James Webb Space Telescope's 6.5-meter mirror. The mirror will gather and focus light onto the telescope's two instruments.

The first is the Wide-Field Instrument (WFI), an infrared camera equipped with 18 detectors and a resolution of 300.8 megapixels. The second, the Roman Coronagraph, is designed to photograph exoplanets—worlds that are often drowned out by the glare of their host stars. To capture these faint objects, the coronagraph uses specialized filters and masking systems to block starlight.

Roman's mission scope is vast: beyond hunting for exoplanets, astronomers will use it to study stars, galaxies, and black holes, as well as probe the mysteries of dark energy and dark matter.

"It would be quicker to list the astronomical questions Roman won't address than those it will," said Julie McEnery, the mission's lead scientist. "We've never had a tool like this before. Roman will transform how we explore the universe."

The telescope is expected to be ready for launch by fall 2026, with liftoff no later than May 2027.