NASA installed a developmental RS-25 engine into the test stand at Stennis Space Center near Bay St. Louis, Mississippi. This engine will be used in an upcoming test series to gather data and evaluate new components for development and production of new RS-25 engines for future Artemis missions. The new RS-25s, built by Aerojet Rocketdyne, will use advanced manufacturing methods and provide increased thrust levels, while also lowering manufacturing costs.