NASA has switched on new technology that could change how astronomers search for exoplanets. The Coronagraph Instrument aboard the Nancy Grace Roman Space Telescope is now active, a basic step toward photographing planets hidden in the glare of their stars.
The coronagraph is built to block starlight so effectively that it can reveal objects up to 100 million times dimmer than the stars they orbit. The Jet Propulsion Laboratory, which leads the project, says this leap in sensitivity could outperform current space coronagraphs by a factor of 100 to 1,000. NASA calls the Roman coronagraph the most advanced ever flown in space. It is designed to directly image planets much fainter than their host stars and test new technologies for future missions.
At the core of the system are deformable mirrors and precision masks, hardware that can adjust to correct optical flaws and scatter. The idea is simple: block the star, see what’s next to it. In practice, it’s difficult. Planets like Jupiter reflect only a tiny fraction of their star’s light and are easily lost from millions of kilometers away. NASA and JPL say the instrument’s optics are designed to suppress starlight, while its masks and deformable mirrors correct for distortions. Space instruments have not achieved this capability at this level before.
The activation, completed between 7:27 and 8:22 a.m. Eastern Time on September 1, 2026, is just the start. The instrument now enters a long phase of calibration and testing as teams work to stabilize the system and fine-tune its ability to block starlight. After these months of adjustments, the coronagraph will begin its planned three months of scientific observations, spread over the first 18 months of the mission. NASA says this phased approach is needed to confirm the instrument’s performance before it collects scientific data.
Roman’s coronagraph is not meant to find another Earth, at least not yet. Its basic targets are older, colder gas giants and the dusty disks that often surround stars. The goal is to capture visible-light images of planets similar in size and temperature to Jupiter, orbiting close to their stars, worlds that have so far escaped direct observation. NASA materials say the coronagraph’s observing time is limited and focused on these bright, low-contrast targets, rather than on a broad survey of exoplanets.
NASA describes the coronagraph as a technology demonstration, not a full-scale planet-hunting campaign. The Roman mission, originally known as WFIRST, was conceived as a flagship observatory to study dark energy and exoplanets, with infrared astrophysics also in its remit. Its basic scientific instrument is the Wide Field Instrument, while the coronagraph’s success could advance future missions, including the planned Habitable Worlds Observatory, which aims to study Earth-like planets around Sun-like stars. NASA says Roman’s coronagraph is directly tied to advancing the technologies needed for such future observatories. Scientific observations with the coronagraph are scheduled only during the early phase of the mission.
The telescope itself is still on its way to its operational post. Launched on August 30, 2026, atop a Falcon Heavy rocket, the Nancy Grace Roman Space Telescope is traveling on a three-month journey to the Sun-Earth L2 Lagrange point, 1.5 million kilometers from Earth. During the trip, engineers are deploying the hardware and bringing onboard systems online, then calibrating them. The coronagraph’s activation is a basic stage, but not the start of the basic science campaign. NASA expects the first images from the coronagraph by early 2027, after extensive system checks and calibrations.
Roman’s field of view will be much larger than that of the Hubble Space Telescope, allowing it to measure the light of up to a billion galaxies during its mission. Its work goes far beyond exoplanets, with plans to study dark matter and dark energy while mapping the structure of the universe. NASA describes the Roman telescope as a major step forward in wide-field infrared astronomy and cosmology.
The coronagraph’s first images are still months away, but its successful activation shows that the hardware is powered and responsive. The real test will come when it tries to separate the faint glow of a planet from the bright light of its star. Meeting that challenge would set a new standard for direct imaging in space.
As the Roman telescope continues its journey, astronomers are watching closely. If the coronagraph works as planned, it will demonstrate a new generation of optical technology and open the door to missions that could find and study worlds that have been invisible until now.
