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I proposed something like this in another question, but it might work better here. Put something in orbit between the sun and Venus to cut down on the amount of sunlight. If you can block it com...
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#1: Attribution notice removed
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System
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2021-03-30T23:53:14Z (over 3 years ago)
Source: https://worldbuilding.stackexchange.com/a/14085 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/