In two years, there could be a space station orbiting the moon. NASA’s Gateway Lunar Space Station, set to launch as early as 2027, will support the Artemis IV and V moon missions and, eventually, be a jumping-off point for missions to Mars. And maybe, one day, a colony.

But before any of that can happen, the Gateway will need a power source—a powerful one, at that. The challenge is getting that energy supply into orbit the way........

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