Launch Catch-Up — NASA Milestone Reported October 22, 2026
NASA’s Nancy Grace Roman Space Telescope has entered science commissioning after completing a broad checkout of the observatory and its main instrument, the agency reported October 22.
The team is now using planned test observations to calibrate instrument responses, characterize performance and refine image quality before transitioning to science operations.
NASA said the telescope can guide, take exposures, move between targets and transmit data as intended. Tests also addressed concerns about maintaining guidance in crowded star fields and dusty regions.
Image consistency matters because small instrumental variations could resemble changes in the objects Roman observes. The commissioning work is intended to distinguish those effects and prepare the telescope for its survey program.
The update reports a completed systems-check milestone and continuing calibration. It does not announce that the full science survey has begun or that the remaining commissioning work is finished.
NASA’s account describes performance observed during testing and expectations for future observations. The next operational step is completing those calibration and characterization activities before routine science work.
Sources: NASA — October 22 commissioning update: https://science.nasa.gov/blogs/roman/2026/10/22/nasas-roman-space-telescope-enters-final-commissioning-phase/