While such a gargantuan undertaking is clearly unfeasible at the moment, it’s never to early to start planning! Dr. Stuart Armstrong, a researcher at the University of Oxford’s Future of Humanity Institute, has done just that, forecasting how humanity could one day build a Dyson swarm around the Sun.
Unlike a shell-like Dyson sphere, a Dyson swarm would be composed of living habitats, satellites, and solar energy collectors orbiting like a net around a star. Energy would be transferred wirelessly between the individual components and Earth. Alternatively, millions of mirrors could be used to focus light onto a fewer number of collectors.