THE PLAN FOR SUSTAINABLE SPACE DEVELOPMENT - establishing an initial infrastructure on the Moon - EXHAUST VELOCITIES     - 1,805 m/s - RP-1 (kerosene)     - 3,720 m/s - Raptor (methane)     - 4,245 m/s - RL-10 (hydrogen)     -11,500 m/s - Ion engine (Dawn) Join the Space Development Network