Nancy Grace Roman Space Telescope

Roman Space Telescope Mission

Roman will survey wide areas of space with a field of view much larger than the Hubble Space Telescope or the James Webb Space Telescope. Those predecessors take detailed views of smaller areas of space, more like a zoomed-in view to Roman’s panoramic.

Roman will observe billions of galaxies, detailing supernovae and other cosmic phenomena. The data will fuel discoveries on dark energy and dark matter, two mysteries of the universe that science cannot fully explain. The telescope will also study exoplanets – planets outside of our solar system – with unprecedented detail. Roman will monitor 100 million stars for hundreds of days and is expected to discover about 2,500 new planets. Included in that number are rocky planets in regions that may support the existence of liquid water.

L3Harris Role

L3Harris is responsible for some of the most important tasks to create the telescope, including refinishing the primary mirror. L3Harris is creating hardware to accommodate and interact with the two instruments on the telescope, the Wide Field Instrument for the mission’s core science goals and the Coronagraph Instrument for future exoplanet direct-imaging technology development.

L3Harris also conducted the successful test of the primary mirror to ensure it functions in the very cold temperatures found in space.

The telescope was initially constructed for another mission, but was transferred to NASA. L3Harris has worked with NASA and other partners to turn the hardware into a powerful astrophysics and universe-exploration tool. Using an existing telescope reduced overall mission cost and schedule risk.

Nancy Grace Roman Space Telescope Video

Roman and other space telescopes

  • Roman has a field of view 100 times that of Hubble at the same depth and resolution.
  • Roman's mirror is the same diameter as Hubble, but is only about one fourth the mass.
  • Ideally, Roman would co-fly with the James Webb Space Telescope to couple the wide survey of Roman with the high-angular resolution and sensitivity of Webb. This would exponentially increase the scientific return.

Nancy Grace Roman Space Telescope

Nancy Grace Roman Space Telescope
Nancy Grace Roman Space Telescope
NASA’s Nancy Grace Roman Space Telescope optics system. Credit: NASA/Chris Gunn
NASA’s Nancy Grace Roman Space Telescope Imaging Optical Assembly. Credit: NASA/Chris Gunn
Engineer inspects NASA's Nancy Grace Roman Space Telescope's primary mirror at the L3Harris facility in Rochester, New York. Credit: NASA
Optical Engineer Bente Eegholm performs an inspection of Roman's Primary mirror. This was taken shortly after it was lifted out of the shipping container.
NASA’s Nancy Grace Roman Space Telescope, encapsulated in a protective payload fairing atop a SpaceX Falcon Heavy rocket, is seen at sunrise, Saturday, Aug. 29, 2026, at Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
Nancy Grace Roman Space Telescope launches from Florida
Nancy Grace Roman Space Telescope
Nancy Grace Roman Space Telescope
NASA’s Nancy Grace Roman Space Telescope optics system. Credit: NASA/Chris Gunn
This photo shows the entire optics system for ...
NASA’s Nancy Grace Roman Space Telescope Imaging Optical Assembly. Credit: NASA/Chris Gunn
NASA’s Nancy Grace Roman Space Telescope Imagi...
Engineer inspects NASA's Nancy Grace Roman Space Telescope's primary mirror at the L3Harris facility in Rochester, New York. Credit: NASA
An optical technician lays on a diving board s...
Optical Engineer Bente Eegholm performs an inspection of Roman's Primary mirror. This was taken shortly after it was lifted out of the shipping container.
Optical Engineer Bente Eegholm performs an ins...
NASA’s Nancy Grace Roman Space Telescope, encapsulated in a protective payload fairing atop a SpaceX Falcon Heavy rocket, is seen at sunrise, Saturday, Aug. 29, 2026, at Launch Complex 39A at NASA’s Kennedy Space Center in Florida.
NASA’s Nancy Grace Roman Space Telescope, enca...
Nancy Grace Roman Space Telescope launches from Florida
With a primary mirror only one forth the mass ...

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