Provided is a system comprising a projector; and a control device, wherein the control device includes a projector position information acquisition unit for acquiring projector position information indicative of a position of the projector, a flight vehicle position information acquisition unit for acquiring flight vehicle position information indicative of a position of a flight vehicle on which a solar cell panel is mounted, and an irradiation direction control unit for controlling an irradiation direction of light emitted from the projector, based on the projector position information and the flight vehicle position information.