Elon Musk has floated the idea of constructing a large electromagnetic launch system on the Moon to send payloads into space more efficiently. Because the Moon’s gravity is only about one-sixth of Earth’s, launching materials from its surface requires far less energy. A lunar mass driver or catapult could theoretically accelerate cargo — such as mined lunar materials — into orbit without traditional rocket fuel. Important Details: • Concept: Electromagnetic mass driver • Uses Moon’s low gravity

Elon Musk's ambitious prediction for the future of humankind is awe-inspiring. | Business Insider