If ion propulsion rocket engine had been implemented, we'd be walking around on Mars today



Homer Hickam : writer, engineer
Ernst Stuhlinger, who proposed a way to fly to Mars more than 40 years ago, and who was Wernher von Braun's science adviser, had conceived an ion propulsion-based spacecraft for missions to Mars, said noted author Homer Hickam. "He and von Braun didn't believe the chemical rockets would be able to reach Mars," he said. "He proposed ion propulsion back in the 1960s. "If ion propulsion had been implemented, we'd be walking around on Mars today."


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