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For questions about any large astronomical bodies classified as planets, and their effects on their systems.

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What resources (especially mineral) can you find on terrestrial planets but not asteroids?

I'm writing about people living in space who can mine asteroids and I'm wondering what minerals or other resources, if any, they might need access to larger planets for. … Since planets and asteroids ultimately condensed from the same cosmic debris, I assume they would contain the same basic elements: iron, carbon, magnesium, aluminium, gold, nitrogen, etc. are all found …
Wesley Botham's user avatar