Black Holes aren’t simply gigantic things that consume everything in their path. They’re also one of the universe’s most significant and most stable energy sources. That would make them priceless to civilizations that require massive amounts of energy, such as Type II Kardashev civilizations. However, to harness all of that power, civilization would have to enclose the black hole with something capable of capturing the energy it emits.
A Dyson sphere — a form of a stellar mega engineering project that encases a real star (or, in this case, a black hole) in an artificial sheath that collects all of the energy emitted by the object at its center – could be one possible solution. However, even if it could catch all of the energy emitted by the black hole, the sphere would still lose heat.
According to new research published by an international team lead by academics at Taiwan’s National Tsing Hua University, this heat loss would make it apparent to us. Such a structure has yet to be discovered. The paper shows that it is achievable despite no visible light passing through the sphere’s surface and a black hole’s reputation for being light sinks rather than light sources.
To comprehend how we might discover such a system, it is necessary first to understand what that system would be designed to accomplish. The authors look at six distinct energy sources that a Dyson sphere could collect around Black Holes. The omnipresent Cosmic Microwave Background radiation, the black hole’s Hawking radiation, its accretion disc, its Bondi accretion, its corona, and its relativistic jets are all examples. Some of these energy sources are far more powerful than others, with the energy from the black hole’s accretion disc coming out on top in terms of potential energy captures.