Stars Turn Neon-Green in First Test Image From NASA’s Roman Telescope

NASA has turned on the Nancy Grace Roman Space Telescope’s powerful camera for the first time, and the stars look like green doughnuts. The debut test image, shared Sept. 15, 2026, shows hundreds of stars in a lime-colored loop shape, because the telescope’s 300-megapixel Wide Field Instrument (WFI) hasn’t been fully focused yet.

The telescope, which launched Aug. 30, is on a months-long journey to Lagrange point L2, a million-mile “parking spot” where Earth and the sun’s gravity hold it in place. NASA scientists are testing and tuning each instrument during the trip, which will end when Roman reaches its final orbit alongside the James Webb Space Telescope and other scientific spacecraft.

Camera first light

Roman’s WFI hasn’t been fully focused yet, so the stars look like lime-colored loops in the debut test image. But all systems are working as they should, according to a NASA statement.

The wavy rows of squares in the image represent Roman’s 18 detectors, which turn photons from distant light sources into electrical signals. Each square is one detector, and the whole camera system captures vast amounts of data.

Every day, the telescope is expected to send roughly 1.4 terabytes of data back to Earth — about five to 10 times the storage capacity of an average smartphone. That is a significant volume of information.

What the camera will see

When Roman is ready to beam home its first full science images in early 2027, it will capture cosmic snapshots as crisp as those from the Hubble Space Telescope — but each of Roman’s images will cover an area 100 times larger than Hubble’s.

NASA has confirmation the instrument is working in space, and Josh Schlieder, chief WFI scientist at NASA’s Goddard Space Flight Center, said as much in the statement, calling it “a huge milestone.”.

There is much to do, but we are on our way to groundbreaking science.

The science that follows

Roman’s surveys of distant galaxies have the potential to reveal new objects and aid in calculations concerning the expansion of the universe, which could offer new insights into dark energy. It will also support the search for alien life.

Another instrument inside Roman, known as a coronagraph, can block out starlight, letting it capture exoplanets with an exactness never before seen. NASA’s own tests this week confirmed that the system works.

If these observations pan out, the tally of confirmed exoplanets could jump from the current total of over 6,000 to more than 100,000 before the end of Roman’s planned 10-year mission.

Mission duration

Roman’s mission, which was meant to last 10 years, now has a good chance of lasting double that span. What remains is a single piece of positive news.

The spacecraft’s thruster burn went as planned, paired with extra fuel added at launch, which could give Roman up to 22 years of power instead of 10. Just as Hubble has kept working far past its original mission parameters, Roman may now remain in service well beyond what was initially expected.

The green loops are no mistake. They are what Roman’s camera showed when it was first switched on, before the lens had been focused.

The picture displays a great many stars within an unnamed stretch of space, alongside the camera’s detectors, which appear as the wavy rows of squares. Each square represents one detector, and the entire system is operating properly.

On Sept. 15, 2026, the image was posted, and it began a months-long process of checking and adjusting every instrument on the spacecraft.

What this means for science

Roman’s science mission will cover several major areas of astronomy:

• Dark energy and the expansion of the universe, through surveys of distant galaxies
• The search for exoplanets, using the coronagraph to block starlight
• The count of known alien worlds, which could rise from over 6,000 to well over 100,000
• The telescope’s ability to operate for two decades or more, if the thruster burn holds

The camera system is still in its initial stages, and the first test image has not yet been fully focused. However, the data gathered so far is promising. The green loops signal that this camera has been turned on in space for the very first time, and that the science to come could prove to be groundbreaking.

The telescope keeps moving toward Lagrange point L2, with NASA researchers checking and adjusting each instrument along the way. The first complete science images are expected in early 2027, and the possibilities are plain to see: Roman could take in a patch of the sky 100 times bigger than Hubble’s, with far more detail.

The green doughnuts in the test image are a sign of what is to come, not a defect. The telescope has not yet been fully focused, but it is operating as intended, and NASA’s statement confirms the instrument is operational in space. The data will begin arriving soon, and with it will come new discoveries about the universe.

Source material: “'We are on our way to groundbreaking science': Stars turn neon-green in first test image from NASA's Roman telescope — Space photo of the week,” Live Science.

dark energy · exoplanets · Hubble · NASA · Roman telescope