Plate Nº 21 · recorded October 10, 2026
Space & AstronomyReported finding
NASA Powers Up Roman Telescope's 300-Megapixel Camera
NASA activated the 300-megapixel Wide Field Instrument on the Roman Space Telescope on September 11, 2026. The infrared camera and coronagraph passed early checks en route to L2.
By Elena Vasquez4 min read723 words
In brief
- Engineers powered on Roman's 300-megapixel Wide Field Instrument on September 11, 2026, after cooling its 18 detectors to minus 225 degrees Fahrenheit.
- Each WFI image will cover a patch of sky larger than the apparent size of a full moon while preserving Hubble-like detail.
- The instrument's 18 infrared detectors have a combined light-sensitive area roughly the size of a laptop screen.
- Roman is travelling roughly one million miles to the second Lagrange point, L2, with first science images expected by early 2027.
- The Coronagraph Instrument, designed to image planets around other stars, is expected to undergo 30 days of decontamination before calibration resumes.
NASA switched on the 300-megapixel infrared camera aboard the Nancy Grace Roman Space Telescope on September 11, 2026, marking a major step toward the observatory's first science images in early 2027.
Mission teams confirmed that the Wide Field Instrument, or WFI, is operational after completing a careful cooling sequence in deep space. The instrument combines an unusually wide view of the sky with Hubble-like sharpness, and each WFI image will cover an area larger than the apparent size of a full moon.
What does the camera actually do?
Roman's WFI will survey enormous stretches of the cosmos while preserving fine detail. Scientists plan to use those observations to find planets beyond our solar system, study dark energy, and map how matter is distributed across the universe.
The instrument uses 18 infrared detectors. Together, those sensors have a light-sensitive area about the size of a laptop screen. Before engineers could turn the camera on, the detectors spent 10 days drying out at minus 85 degrees Fahrenheit (minus 65 Celsius) to remove contamination.
On the morning of September 11, the team shut off the instrument heater and let the WFI cool to minus 225 degrees Fahrenheit (minus 143 Celsius). At that temperature, the 18 detectors came online. Engineers powered up the calibration system that evening and began sending test data through the instrument the next morning. Data successfully traveled back to teams on Earth.
How does Roman focus so much sky?
That Saturday evening, engineers tested the element wheel, which holds filters, prisms, and other optical components. This wheel controls which wavelengths of light reach the detectors and can split light from cosmic objects into individual colors. It marked the first time this mechanism had operated without gravity.
By the next morning, the team was testing the focusing mechanism. That system will keep the hundreds of thousands of images Roman is expected to capture properly sharp. Throughout these tests, the detectors kept cooling toward their final operating temperature of about minus 300 degrees Fahrenheit (minus 183 Celsius).
"After years of effort to build and test the instrument on the ground, we now have confirmation that it is operational in space," said Josh Schlieder, the Wide Field Instrument scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "This is a huge milestone for the team at Goddard, our industry teams at BAE Systems, Inc. and Teledyne, and our science centers. There is much to do, but we are on our way to groundbreaking science."
What's the coronagraph for?
Roman's Coronagraph Instrument passed its own early checkout earlier in the month. The device is a technology demonstration aimed at directly imaging planets around other stars. It uses masks, self-flexing mirrors, and sensors to suppress the overwhelming glare of a host star, letting much fainter planetary light come through.
Teams at the Coronagraph Commanding Center at Caltech/IPAC in Pasadena, California, verified that they can communicate with every major subsystem:
- Software
- Thermal controls
- Mechanical actuators
- Avionics
In practical terms, the test confirmed that engineers on the ground can remotely drive the instrument's movable masks, color filters, and lenses.
Most of the coronagraph hardware is designed to operate at a relatively warm 72 degrees Fahrenheit (22 Celsius). That near-room-temperature design simplifies testing and helps preserve the material properties of its deformable mirrors. Only the detectors are cooled.
When will Roman start doing science?
The WFI tests are part of a months-long commissioning campaign that will continue as Roman travels roughly one million miles toward its destination at the second Lagrange point, or L2. The team expects to release Roman's first science images by early 2027.
For now, the coronagraph is in a quiet phase. "We've been decontaminating: sitting idle with our detectors warm so anything that's stuck to the surface, such as water or trace chemicals, will tend to leave it," said Eric Cady, an optical engineer leading commissioning efforts for the Roman Coronagraph at NASA's Jet Propulsion Laboratory in Southern California. "This will continue for 30 days, with occasional stops to do other early calibration activities."
The early results show both the Wide Field Instrument and the coronagraph functioning as designed. Engineers still need to finish cooling, calibration, and decontamination before the observatory can begin its survey of the universe.
via science.nasa.gov (Original)
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