Abstract: A propulsion system for spaceships wherein a first electromagnetic projectile launcher (EMPL) accelerates "smart" projectiles into space and on appropriate trajectories to rendezvous with a distant spaceship at some later time. The smart projectiles stabilize themselves in space using a system of on board thrusters operated by computers. Laser beams and radio transmissions are directed at the spaceship and are monitored by sensors aboard the spaceship. Computers on board the spaceship determine any necessary course corrections for the projectiles based upon the spaceship's sensor system. Appropriate commands are radioed to the projectiles which execute the commanded maneuvers to alter their trajectories. The spaceship carries a second EMPL and a nuclear-powered electricity generating facility to provide electricity to operate the EMPL.