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1. Planetary Differentiation Processes

   Linked via "liquid convection"

   The initiation of significant planetary differentiation requires sufficient internal energy to overcome the viscosity of solidifying materials. Primary energy sources include accretionary heating (the kinetic energy of impacts), radiogenic heating from the decay of short-lived radionuclides (such as Aluminum-26, although this source is now largely discounted for bodies formed after the initial [solar nebula](/entries/so…