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

NASA's RS-25D space shuttle engines are downright incredible to behold

Remember the picture of the Pratt Whitney Rocketdyne engines that looked an awful lot like a band of Daleks in disguise? That picture may have done a good job of making space shuttle engines look like a bunch of malevolent cyborgs, but there wasn't really anything in the photo to give you a sense of just how impressive … » 1/18/12 1:45pm 1/18/12 1:45pm