NASA’s dark universe-seeking Nancy Grace Roman Space Telescope launched

Now on a three-month, million-mile journey toward its final orbit, NASA’s Nancy Grace Roman Space Telescope (“Roman”) is intended to reveal the universe’s darkest secrets. The mission launched on August 30th aboard a SpaceX Falcon Heavy rocket at the agency’s Kennedy Space Center in Florida.

Roman pairs a large field of view with crisp infrared vision to explore vast swaths of the sky and probe deeply into cosmic history. This flagship mission is intended to help astronomers explore dark matter, dark energy, and worlds outside of our solar system, known as exoplanets. Its surveys will support a broad range of research extending far beyond the mission’s main science goals.

“Roman is exactly the kind of success story we want to see across NASA,” said NASA Administrator Jared Isaacman. “Delivered ahead of schedule and on budget, this mission will give us a new atlas of the universe, push the boundaries of discovery, and demonstrate what is possible when America’s space program pairs bold ambition with disciplined execution.”

The ground control team at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, began receiving telemetry data from Roman seven minutes after launch.

“Roman will be a discovery machine that will bring us closer than ever before to answering humanity’s most profound questions about our cosmic history,” said Nicky Fox, associate administrator for the Science Mission Directorate at NASA Headquarters in Washington. “With its large field of view and fast survey speeds, Roman will usher us into a new era of discovery and make the invisible visible, setting the foundation for humanity’s search for life beyond our solar system.”

Successful deployments

The Roman team also confirmed successful deployment of the observatory’s solar panels and lower instrument sun shade an hour and 23 minutes after launch. Within the upcoming days, Roman’s high-gain antenna and visor-like deployable aperture cover will deploy, ground controllers will initiate the first of two-mid-course corrections, and the Coronagraph Instrument will power on.

This instrument will demonstrate the technology that future missions like NASA’s Habitable Worlds Observatory concept could use to image Earth-like planets in the search for life in the universe. Roman’s Coronagraph will take a giant step in that direction by snapping pictures of Jupiter-like planets.

A few weeks into Roman’s voyage, its primary instrument, the Wide Field Instrument, will activate. This 300-megapixel infrared camera has 18 4K detectors, each about the size of a saltine cracker. These detectors collect photons of light that will be decoded into crisp cosmic panoramas. Thanks to the observatory’s rigid design and stable optical performance, it will rapidly scan the sky without needing substantial time between separate observations. The Roman telescope is designed to survey the universe a thousand times faster than NASA’s Hubble Space Telescope.

Throughout the rest of Roman’s three-month commissioning period, scientists will run the instruments through a series of calibrations and tests. NASA anticipates releasing Roman’s first images by early 2027.

Roman will send back 1.4 terabytes of data every day, the highest data rate of any NASA astrophysics mission, so far. Machine learning, artificial intelligence, and citizen scientists will help sift through it and flag significant findings, which astronomers can then study.

Roman is the fourth primary mission NASA has launched on a Falcon Heavy rocket. Earlier this year, the agency’s Launch Services Program worked with SpaceX to accelerate the launch date to accommodate the space telescope’s early completion.

The telescope is managed at NASA Goddard with participation by the agency’s Jet Propulsion Laboratory in Southern California; Caltech/IPAC in Pasadena, California; and the Space Telescope Science Institute in Baltimore. The primary industrial partners are BAE Systems, L3Harris Technologies, and Teledyne Scientific & Imaging.

SPIE Digital Library: Roman Collection

The launch of the Nancy Grace Roman Space Telescope represents the culmination of decades of scientific and engineering innovation. Throughout that journey, SPIE conferences and the Journal of Astronomical Telescopes, Instruments, and Systems (JATIS) served as an important forum for presenting many of the mission's pivotal advances, from detector technologies and instrumentation to mission concepts and coronagraph development. This collection (click for more information and links) brings together selected SPIE content that chronicles the evolution of Roman and the community that helped make it possible.