To solve problems wherein since in many cases, a conventional electric propulsion system used in the aerospace is an ion jet type most of which have a structure for ionizing and injecting a propellant, the electric propulsion system has small thrust force and increased weight due to the propellant and interstellar matter is too thin to obtain thrust force if used.

Magnetic poles and electrodes are installed in a body so that the electromagnetic field in which the magnetic poles and electrodes are approximately orthogonal to each other has an annular shape. In this annular electromagnetic field, supply and discharge of electric charges or bias of electric charges by an electric field is generated. Thus, ring current is generated in the annular electromagnetic field to generate a magnetic field. Due to the action of the magnetic field generated by the body and the magnetic field generated by the ring current, propulsive force is generated by the magnetic force.