This week in 2017, NASA engineers completed the eighth and final RS-25 rocket engine hot fire test at NASA’s Stennis Space Center. The engine tested included a large 3D-printed part scheduled for use on future RS-25 flight engines that will power the core stage of NASA’S Space Launch System. The part was a beach ball-sized pogo accumulator assembly that acts as a shock absorber to dampen vibrations, or oscillations, caused by propellants as they flow between the vehicle and the engine. The hardware performed as expected, opening the door for more components scheduled for future tests. Today, NASA’s Marshall Space Flight Center is playing a vital role in the Artemis program by developing the SLS, the backbone of NASA’s exploration plans and the only rocket capable of sending humans to the Moon and Mars. The NASA History Program is responsible for generating, disseminating and preserving NASA’s remarkable history and providing a comprehensive understanding of the institutional, cultural, social, political, economic, technological and scientific aspects of NASA’s activities in aeronautics and space. For more pictures like this one and to connect to NASA’s history, visit the Marshall History Program’s webpage. (NASA)