In a fantastically animated piece, the ever-insightful Kurzgesagt explains the idea of a Dyson Sphere – a megastructure that includes the sun in order to capture a large percentage of its energy and direct it outward to other planets should the Earth get cold. While this is only a theoretical experiment, the plan behind this unusual solution seems somewhat doable with tons of money and a lot of time.
If humans want to expand into space, it will take us incredible amounts of energy. How do we do that? Easy: we will just use the sun’s energy by realizing the most ambitious construction project in history. This is how it works.