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Given ideal circumstances and a type 4 or 5 Kardashev scale level of technology to set the system in motion (but not to maintain the motion over time): How many planets 1/4 of the Earth's mass co...
Given ideal circumstances and a type 4 or 5 Kardashev scale level of technology to set the system in motion (but not to maintain the motion over time): How many planets 1/4 of the Earth's mass co...