Aerojet Rocketdyne has announced it successfully finished a complete verification test with its RS-25 rocket engine, which will be powering NASA’s Space Launch System in the future. The full duration was 535 seconds long; the test was performed alongside NASA at its Stennis Space Center. This marks the half-dozen test out of a planned seven-test series. The first test took place back in January. The RS-25 rocket engine was formerly referred to as the Space Shuttle Main Engine (SSME), and spent decades in service powering the space shuttle, according to Aerojet.