Mars and Vesta are in our side of the snowline - but they are closer to the snowline. Why are they not water worlds?
The question has perhaps not been worth the asking; intuitively, their cores aren't as dense and they're smaller. Now, Kun Wang brings the math.
Wang's crew also suggest bringing it to exoplanets, if they are sub-Earth in mass but in "the habitable zone". Chances are: they're desert planets like Mars.
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