NASA Launches Nancy Grace Roman Space Telescope, Headed for L2 to Study Dark Energy and Exoplanets

NASA’s Nancy Grace Roman Space Telescope launched successfully Sunday morning, sending the agency’s next flagship astrophysics observatory on its way to a science outpost about 1 million miles from Earth. Roman lifted off at 7:26 a.m. EDT aboard a SpaceX Falcon Heavy from Launch Complex 39A at NASA’s Kennedy Space Center in Florida, beginning a mission aimed at probing dark energy, dark matter and planets orbiting other stars.

NASA said its Goddard Space Flight Center began receiving telemetry from the spacecraft about seven minutes after liftoff. The Falcon Heavy separated from Roman 31 minutes into flight and performed as expected, NASA said. About 1 hour 23 minutes after launch, Roman’s solar arrays and lower instrument sunshade deployed successfully, key early steps as the observatory begins its journey.

The telescope is now headed toward an operating orbit near the Sun-Earth L2 region, a gravitationally stable area used by major space observatories because it offers a steady environment for astronomy. NASA said the trip will take about three months, followed by a roughly three-month commissioning period. A few weeks into the voyage, the mission’s main camera, the Wide Field Instrument, is expected to switch on for alignment and calibration. NASA expects to release Roman’s first images in early 2027.

The mission matters because Roman is built to survey large swaths of the sky far more efficiently than earlier observatories while using a 2.4-meter primary mirror, the same diameter as Hubble’s. Its main instrument, the Wide Field Instrument, is a 300-megapixel infrared camera made up of 18 4k detectors. NASA says Roman will use that wide-field view to study how the universe expands, map the influence of dark matter, and expand the search for exoplanets. The observatory also carries the Coronagraph Instrument, a technology demonstration designed to test direct-imaging techniques for future planet-hunting missions. NASA says Roman will return about 1.4 terabytes of raw science data a day, the highest data rate of any NASA astrophysics mission to date.

“Roman is exactly the kind of success story we want to see across NASA,” NASA Administrator Jared Isaacman said in the agency’s launch announcement. He said the observatory was delivered ahead of schedule and on budget, and that it will provide “a new atlas of the universe” while pushing the boundaries of discovery.

Roman is NASA’s next major space observatory for astrophysics and, for one sentence of historical context, was previously known as WFIRST before being renamed in 2020 for Nancy Grace Roman, NASA’s first chief astronomer. The mission is planned for a five-year primary science campaign, with a 10-year goal. If the observatory meets those goals, it will become a long-running survey machine for astronomers studying the so-called dark universe and the population of worlds beyond our solar system. NASA has previously listed the mission’s lifecycle cost at about $4.3 billion.

For now, the focus is on the months ahead: the cruise to L2, the activation and calibration of Roman’s instruments, and the start of commissioning. If those steps go as planned, the telescope’s first public images will arrive in early 2027, opening the next phase of NASA’s effort to map the cosmos on a much broader scale.