NASA conducted a successful 500-second test firing of the J-2X rocket engine on November 9, 2011, marking another important step in development of an upper stage for the heavy-lift Space Launch System. Credit: nasamarshall/Flickr, CC BY-NC 2.0
NASA conducted a successful 500-second test firing of the J-2X rocket engine on November 9, 2011, marking another important step in development of an upper stage for the heavy-lift Space Launch System. Credit: nasamarshall/Flickr, CC BY-NC 2.0
