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Astronomy

The Dynamics of Planetary Migration in the Early Solar System

Quick fact

The Nice model suggests that the gas giants originally formed much more compactly, with Jupiter and Saturn in a 3:2 resonance, before a dramatic interaction with a disk of planetesimals flung them into their current orbits.

Why this is interesting

You know Jupiter is a giant, but what if it once roamed closer to the Sun, and then snuck out to where it is now? The solar system's planets are not permanent fixtures; they've moved.