Baiju Bhatt, one of the co-founders of the popular trading app Robinhood, is embarking on an exciting new project focused on solar energy from space. His new company, Aetherflux, has recently raised $50 million to develop technology that will collect solar power using satellites orbiting Earth. The idea is to harness the sun's energy in space, where it is abundant, and then send that clean energy back to Earth for use.

Aetherflux plans to launch a demonstration satellite in 2026 to test this in...