Article

The Greta rocket engine, part of ESA's Future Launchers Preparatory Programme, successfully completed its first test campaign. This 5 kN thrust class engine, designed for lunar landers and stages like Ariane 6's Astris, uses hydrogen peroxide and ethanol as propellants. The engine was tested multiple times from July to November 2025, demonstrating stable operations and continuous firings for over 40 seconds.