• cogitase@lemmy.dbzer0.comEnglish
    5·
    3 个月前

    Is there a lower density limit for having a magnetosphere though? A habitable planet with 1.5x earth radius and the same mass would be much easier to get off of.

    • CheeseNoodle@lemmy.worldEnglish
      6·
      3 个月前

      I guess that could work? Earth is actually the densest planet in the solar system so our baseline mass > size ratio might actually be a bit abnormal.

      • MrFinnbean@lemmy.worldEnglish
        2·
        3 个月前

        I was sure you were bullshitting, but no. Its true.

        Iron and nickel core + enough mass for gravity to start compress the planed and we are just little more dense than Mercury.