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cc  ·  4426 days ago  ·  link  ·    ·  parent  ·  post: Diamond planet is twice the size of Earth

According to the end of the paper, it appears to be challenging the traditional assumptions that rocky exoplanets would have similar compositions to what we have here.

    Numerous studies have suggested the possibility of carbon-rich exoplanets ... However, the prevalent practice is to assume Earth-centric compositions, comprising of Fe, silicates, and H₂O, in explaining super Earth observations. A carbon-rich 55 Cancri e would represent a departure from Earth-centric mineralogies in rocky exoplanets.