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How to Build a Dyson Sphere

posted by Jason Kottke   Dec 20, 2018

Perhaps the most fundamental way to think about the Universe is in terms of energy. Even when you get away from physics and chemistry (where energy is obviously central) and into a topic like human history or economics, following how and where energy flows can be enlightening. In 1964, Soviet astronomer Nikolai Kardashev proposed thinking about the progress of human civilization in terms of how much energy we were capable of harnessing. On the Kardashev scale, a Type I civilization would be capable of using all of the energy available on their planet, a Type II civilization could use all the energy from their local star, and a Type III civilization could harness all the energy in a galaxy.

According to an equation suggested by Carl Sagan, humans are currently sitting at ~73% of a Type I civilization. But once we reach that milestone in perhaps a few hundred years (assuming we don’t blow ourselves up in the process), the construction of a Dyson sphere or, more likely, a Dyson swarm around the Sun is probably the key to eventually hitting Type II. In the video above, Kurzgesagt explores what would go into building some type of Dyson structure capable of harvesting most of the Sun’s energy. For starters, we’d probably have to completely dismantle the planet Mercury in order to have enough raw materials to build the swarm.