[REVISION HISTORY]

Nancy Grace Roman Space Telescope launched and instrumented

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2026-10-24 13:45 UTC → 2026-10-27 21:09 UTC · added ~~removed~~

NASA successfully launched the Nancy Grace Roman Space Telescope on August 30, 2026, via a SpaceX Falcon Heavy rocket. The $4.3 billion observatory is transiting to the second Sun-Earth Lagrange point (L2) to investigate dark energy, dark matter, and the expansion of the universe. Following the successful activation of the Coronagraph Instrument on September 1, 2026, NASA confirmed the telescope’s operational life has been extended to at least 22 years. ~~This longevity is attributed to a lighter-than-expected launch mass and efficient orbital maneuvers.~~ In late September, the telescope completed validation tests of its fine-guidance system and coronagraph, demonstrating pointing stability better than 1/100,000 of a degree. ~~The coronagraph successfully observed stars within the Large Magellanic Cloud to test its ability to block starlight for direct exoplanet imaging.~~ As of ~~late September~~ mid-October 2026, the 300-megapixel Wide Field Instrument (WFI) has been ~~activated. By mid-October 2026, engineers at NASA’s Goddard Space Flight Center~~ activated and brought to an operating temperature of approximately -183 °C. Engineers reported that the WFI is delivering image quality ~~nearly 30%~~ significantly better than ~~predicted, achieving~~ predicted; while initial reports cited an optical precision of ~~approximately~~ 90 nanometers ~~RMS. To support high data requirements, NASA,~~ RMS, subsequent precision adjustments—including moving the ~~ESA, and JAXA demonstrated reception speeds~~ secondary mirror by a fraction of up a human hair’s diameter—reduced the imaging error to ~~500 megabits per second across global ground stations.~~ 63 nanometers RMS. In late October 2026, the mission transitioned into its final science commissioning ~~phase. Following successful tests of telescope slews and guidance~~ phase, with orbital insertion at L2 expected in ~~crowded star fields,~~ early December. To support its scientific objectives, the ~~focus~~ Roman Space Telescope has ~~shifted to detailed validation~~ entered an international partnership with the Subaru Telescope on Maunakea. Subaru will contribute 100 nights of ~~scientific performance, including photometric calibration~~ observations to provide complementary data on the distance, composition, and ~~monitoring gravitational microlensing capabilities.~~ motion of objects identified by Roman. NASA expects to begin primary science operations and release the first fully calibrated scientific infrared images in early 2027.

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