Artemis III boosters stacked and all four engines installed
Booster stacking finished on 30 September 2026. NASA’s 13 October report confirms that all four RS-25 engines are also installed.
Next comes core-stage integration with the boosters, followed by a short-stack tanking test at Launch Pad 39B. This is assembly progress, not confirmation that the rocket is ready to fly.
Published and reviewed 15 October 2026. Follow Artemis III →