Elon Musk explains how to build AI satellites on the moon from lunar silicon and aluminum, and says 500 to 1,000 terawatts a year cannot be launched from Earth “Well, the lunar soil is 20% silicon or something like that. So you can mine the silicon on the moon, refine it, and create the solar cells and the radiators on the moon. So get the radiators out of aluminum. So there’s plenty of silicon and aluminum on the moon to make the cells and the radiators. The chips you could send from Earth because they’re pretty light. But maybe at some point you make them on the moon, too."