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In my answer to another question, I suggested that the Super-Earth in question be tidally locked to its host star for a period of time while part of its surface experienced a bombardment. After tha...
#1: Attribution notice removed
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System
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2020-06-01T14:13:57Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/q/139457 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/