1 min readSecond Ignition Test of the J-2X Rocket EngineNASAJul 19, 2012 Image Article A 1.9-second ignition test of the J-2X rocket engine is conducted on the A-2 Test Stand at NASA's Stennis Space Center. A 1.9-second ignition test of the J-2X rocket engine is conducted on the A-2 Test Stand at NASA’s Stennis Space Center. Image credit: NASA/SSC