Assertion: terrestrial planet's density | /r/CapableOf | explain overall density of the planet
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Source sentences:
text: So when a calculation of the structure of a planet such as the Earth, based on a strictly rocky structure (as discussed above) gives a density which is too low to explain the overall density of the planet, the solution to the problem must be that the core, consisting primarily of much denser nickel-iron mixtures/crystals, must provide the extra mass required.