Assertion: solar system's planet | /r/CapableOf | form by accretion
Facets:
Source sentences:
text: He concluded the planets must have formed by accretion and explained the compositional difference (solid and liquid planets) as due to the temperature difference between the inner and outer regions, the former being hotter and the latter being cooler, so only refractories (non-volatiles) condensed in the inner region.