Rocketman #1

Rocketman is captured by Martian ruler Kaga and taken to Mars, where he discovers that the Martians have invaded Earth and forced its inhabitants to turn back and land on Mars. Kaga demands that the Earthlings become slaves, but Rocketman and his companions refuse to surrender. Rocketman is then brought before Morono, King of the Plutonian idiots, who reveals a laboratory containing a mind-control device that crystallizes thought energy and can be transferred through helmets to enslave victims for ten years at a time.