Isaac Arthur examines Dyson spheres and swarms, including common myths and misconceptions. He covers uses such as interstellar travel, black hole generation, and computing large enough to simulate universes.
Why Hacker News points people here: HN references it in threads on megastructures, Kardashev civilizations and Dyson sphere detection, and recommends the channel for in-depth futurist content.
“Isaac Arthur's youtube channel goes into this in some depth (and is generally excellent, IMO).”HN comment, 2022
“Isaac Arthur's youtube channel goes into this in some depth (and is generally excellent, IMO).”
Explains building a Dyson swarm from asteroid material
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There's plenty. The vast majority of the 'shell' would be solar concentrators - basically aluminium foil or something like it. You can make a LOT of that by dismantling a few asteroids, never mind a planet or two. Isaac Arthur's youtube channel goes into this in some depth (and is generally excellent, IMO). Here's an episode on Dyson Spheres: this video
Cites itstcredzeroJul 2017
“this is actually paltry for what's possible for a Kardashev 2 level civilization”
Explains megastructure-scale habitats far beyond hundreds of planets
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As huge as 416 Earths sounds, this is actually paltry for what's possible for a Kardashev 2 level civilization: this video
Cites itstcredzeroMar 2018
“416 is a very small number.”
Shows artificial habitats offering vastly more living space than planets
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If you're going to be using artificial habitats to have more living space, 416 is a very small number. this video
Cites itcletusMar 2019
“It essentially means breaking the laws of thermodynamics, specifically entropy.”
Covers whether a Dyson sphere could be hidden
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See [1] and [2] where the idea of hiding a Dyson sphere is covered in depth. It essentially means breaking the laws of thermodynamics, specifically entropy. Hit and object with light from a star and it heats up. It radiates away that heat in a predictable way. [1] link [2] this video
