The solar system planetary architecture has been proposed to be consistent with the terrestrial and giant planets forming from material rings at ~1 au and ~5 au, respectively.
protoplanetary
Posted inAstrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report
Planet Formation — Observational Constraints, Physical Processes, And Compositional Patterns
The goal of planet formation as a field of study is not only to provide the understanding of how planets come into existence.