RS-25 engine No. 2059 arrives at the A-1 Test Stand at Stennis Space Center on Nov. 4, 2015.
RS-25 engine No. 2059 arrives at the A-1 Test Stand at Stennis Space Center on Nov. 4, 2015. NASA is scheduled to test the engine March 10. It will mark a major milestone as the first test of a RS-25 flight engine for the new Space Launch System, being developed to carry humans deeper into space than ever before, including to an asteroid and Mars.