NASA is testing the rocket engines that will take us back to the Moon…

This is the J2-X. The liquid-fuel cryogenic rocket engine is the modernized version of the J-2, which NASA used in the late-'60s and early-'70s to thrust humans beyond low Earth orbit. (Click any image below for hi-res.) » 2/14/13 9:40am 2/14/13 9:40am