The solar nebula theory of the formation of the solar system accounts for the differences in composition between the terrestrial and Jovian planets.

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The solar nebula theory proposes that the inner, terrestrial planets formed from materials that were closer to the sun and therefore primarily rocky, while the outer, Jovian planets formed from materials that were further away and therefore primarily gaseous. This accounts for the differences in composition between the two types of planets.

The Solar Nebula Theory of the Formation of the Solar