NASA's Artemis Program Faces New Setback as Engine Fails During Test A significant setback has hit NASA's ambitious Artemis program, which aims to return humans to the lunar surface by 2025. According to sources, a critical engine test has failed, leaving the program's timeline and budget in jeopardy. The SLS rocket's core stage engine, a crucial component for the Artemis mission, was being tested at the Stennis Space Center in Mississippi when the failure occurred. The incident raises questions about the program's ability to meet its ambitious deadline and the potential cost implications of the delay.