The spaceship featured on the above cover painting resembles jet aircraft of the era (early 1950s). As such, the artist chose to alter the wing-tip fuel pods making them rocket engines. The viewpoint of the scene obscures a view of the top surface of the vehicle. Perhaps, a cockpit exists on the opposite side of the rocket. Obviously, the craft is a rocket rather than a jet since no air-scoops appear in the picture. Jet engines require oxygen from the atmosphere for combustion of the jet's fuel.