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Dyson is a TM for vacum cleaners and this is from wiki: A Dyson sphere (or shell as it appeared in the original paper) is a hypothetical megastructure that was originally described by Freeman Dyson as a system of orbiting solar power satellites meant to completely encompass a star and capture its entire energy output. Dyson speculated that such structures would be the logical consequence of the long-term survival of technological civilizations, and proposed that searching for evidence of the ex…