How to return. Build a thing which will fly up, like an helicopter. From bottom to top: 1) coordinate axis from metal, 2) a circle pipe filled with water, it needs for stabilization of the rotation, 3) two rings to create perfect rotation, 4) one propeller blade for strongest propeller thrust. By rotation lowest part with hands, propeller will rotating and bring thing upwards. By flying up there will be dark space, by flying very high planet will be smaller and smaller. Eventually there will be limit, absolute blackness, the planet will be invisible. After it move back down, planet will start to appear, and thing will land at the place where it started to fly up