Robert Zubrin’s Nuclear Salt Water Rocket (NSWR) design is a rocket that uses known physics and engineering . There are versions that could reach 7-8% of light speed. The use of low grade uranium ...

The rockets are expensive, whether they use liquid or solid fuel, so the West German Ministry of Transport asked jet-propulsion experts to evaluate hot-water rockets, a prewar German idea that ...

If all goes according to plan, the Athena lander will touch down near the moon's south pole on or around March 6.