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Q&A Rigorous Science Meta
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Q&A Large Thick but Hollow Planet with small inner planet

Earlier today I came across this question, asking as to the effects of having a planet with a shell around it acting as a planet itself, so there was a planet within a planet with neither in contac...

3 answers  ·  posted 8y ago by SlipperyPete‭  ·  last activity 8y ago by SlipperyPete‭

Question planets extreme-terrain