One alternative rocket, called Jupiter, was designed by moonlighting NASA engineers (Illustration: DirectLauncher.com)
NASA’s plan to return to the moon by 2020 is looking shaky – rather like Ares I, the rocket it hopes will carry astronauts to space.
Gallery: See a gallery of NASA’s rocket candidates
The agency’s project aims to replace the retiring space shuttle with Ares I, which will fly the Orion crew capsule to near-Earth orbit, and Ares V to carry a rocket and lunar lander. But to do this, NASA needs tens of billions of extra dollars over the next decade (Â鶹´«Ã½, 25…
