Unrelatedly, I tested the OPM universe with Principia's N-Body simulation, just for fun. It did better than I expected, but it did not do good. Here's my report: Plock and Karen system Despite Plock's solar orbit trajectory being spun all around due to Karen, the system is stable (it's only 2-body for all intents and purposes, after all). I didn't check, but I suspect that the 2:3 resonance of Plock and Neidon is broken from the initial kick of Karen. Neidon system Nei
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