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In a filing with the SEC last week, SpaceX said it plans to raise $75 billion from new investors in its first sale of shares to the public. If successful, the IPO would value the company at approximately $1.75 trillion and put Elon Musk on a path to becoming the first trillionaire in history.

According to DW, Musk wants SpaceX to do more than just send astronauts into space. He plans to build the infrastructure to secure the future of human life beyond Earth. The ultimate goal is to create self-sustaining cities on Mars that could be home to up to one million people. To make that happen, SpaceX wants to utilize the natural resources found on the moon and on asteroids to support multi-planetary exploration.

Because those celestial bodies have little or no gravity, it is much easier and cheaper to land on them to extract materials. The moon is a critical part of those plans because factories and fuel depots could be constructed there at much lower cost than lifting the raw materials needed into orbit from the Earth.

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