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Astronomy

Jupiter's Gravity and Asteroid Belt Dynamics

Quick fact

Jupiter's gravity creates 'Kirkwood gaps'—empty bands in the asteroid belt where asteroids' orbital periods align with Jupiter's in simple ratios, causing them to be flung out of their orbits or into eccentric paths.

Why this is interesting

You might picture the asteroid belt as a chaotic ring of rocks, but it's actually a meticulously carved structure—and Jupiter is the sculptor. Why are there vast empty lanes where you'd expect asteroids to be?