
Color filters for Roman’s Coronagraph Instrument, shown in an archival image published December 21, 2022. Credit: NASA/JPL-Caltech. Image source. JPL image-use policy.
NASA’s Nancy Grace Roman Space Telescope has passed an early checkpoint for its planet-imaging experiment. In a September 30 announcement, the agency’s Jet Propulsion Laboratory said Roman’s Coronagraph Instrument captured its first light from space on September 22, 2026. The result confirmed that the instrument could form a focused image as engineers work through a series of increasingly demanding tests.
Built at JPL in Southern California, the coronagraph is designed to suppress the glare of stars so researchers can study much fainter planets and dusty disks nearby. It was switched on September 1, followed by checks of its electronics and moving parts in the middle of the month.
What the tests showed
The first target was a faint star in the Large Magellanic Cloud, a neighboring galaxy. NASA’s detailed commissioning report says the detectors were deliberately warmer than their eventual operating temperature to help prevent contamination from sticking. That also added noise to the observation.
On September 27, the team cooled the detectors and observed another part of the same galaxy. Seeing the expected collection of stars helped confirm the instrument’s pointing.
The update also covered Roman’s fine-guidance system, which passed tests September 15–21. Small regions of the Wide Field Instrument’s 18 detectors track guide stars, feeding position measurements to the spacecraft’s attitude-control system roughly four times a second. This allows tiny corrections that keep an observation steady. The coronagraph also has an internal stabilization process, important because small disturbances can let unwanted starlight overwhelm a faint target.
Why this matters for planet science
Roman’s coronagraph technology combines light-blocking masks with adjustable mirrors. Thousands of small actuators change the mirrors’ shapes to compensate for imperfections and changes in the telescope’s optics. The aim is to isolate light arriving from planets and circumstellar material that would otherwise be difficult to distinguish against a star’s brightness.
NASA plans to demonstrate the technique with large, gaseous planets, including Jupiter-size worlds around Sun-like stars. Successful operation could help inform larger future telescopes designed to investigate more Earth-like planets. Those are goals for the technology; the newly reported observations establish an early step in getting the equipment ready.
Roman is undergoing commissioning during its journey to the Sun–Earth L2 region. Systems must be activated, calibrated and checked before science operations. NASA says that schedule can change as the team evaluates performance, so further testing will determine how quickly this first look becomes a working tool for astronomy.

