Electric propulsion systems use electric energy to generate thrust for vehicles, such as spacecraft and electric vehicles. These systems typically rely on electric motors or ion thrusters, which convert electrical energy into mechanical energy, allowing for efficient movement without traditional fuels. One common type of electric propulsion is the ion thruster, which accelerates ions using electric fields to produce thrust. This technology is particularly useful in space exploration, as it offers high efficiency and can operate for long durations, making it ideal for missions to distant planets or asteroids.