What modern accretion disk scenario describes Jupiter migrating inward and then outward?
Answer
The Grand Tack hypothesis.
While the fundamental premise of the rotating nebula remains central, the model has undergone significant refinement. One example of such complex, non-linear development within the accretion disk is the Grand Tack hypothesis. This modern scenario suggests that Jupiter did not simply form in its current location but migrated inward toward the Sun due to gravitational interactions and gas drag, before subsequently migrating outward to settle into its present orbit. This mechanism is built upon the essential scaffolding provided by the overall nebular framework, illustrating the model's flexibility in accounting for complex planetary evolution.
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