🍂NASA ushered in the Gulf Coast fall season with force Nov. 15, conducting a full-power, full-duration 650-second RS-25 engine test on the A-1 Test Stand at Stennis Space Center near Bay St. Louis, Mississippi, where the agency is testing engines to help power its new Space Launch System (SLS) rocket. Operators fired development engine No. 0525 to a 113 percent thrust level for 60 seconds during the test, marking only the second time they have achieved the highest RS-25 power level. Engineers first fired development engine No. 0528 to that level during a February test at Stennis. Four RS-25 engines will help power SLS at launch, supplying a combined 2 million pounds of thrust and working in conjunction with a pair of solid rocket boosters to provide more than 8 million pounds of thrust. RS-25 tests continue NASA’s progress toward Exploration Mission-1, where the new rocket will send an Orion spacecraft around the Moon and back to test critical capabilities needed to carry astronauts f...