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Q&A How close could we be to a stealth planetarysystem?

Start with a powerful space-faring civilization. They are Kardashev Type II, having harnessed the total energy output of their sun. To do this, they have encapsulated their star with a tight-fitti...

2 answers  ·  posted 9y ago by Henry Taylor‭  ·  last activity 8y ago by Henry Taylor‭

Question gravity