Why are there asteroid belts?
Show answer & explanation
Answer: Jupiter prevented planet formation
Jupiter prevented planet formation ✓ — Correct! Main asteroid belt (between Mars and Jupiter) contains material that never coalesced into planets. Jupiter's massive gravity created orbital resonances, stirring material and preventing accretion. Asteroids collided too energetically to merge—fragmenting instead. Total asteroid mass <4% of Moon! Failed planet formation. Kuiper Belt (beyond Neptune) similar—Neptune's influence prevented planet formation there!
Comets left debris behind — Wrong. Asteroids are rocky/metallic (inner system), not icy comets. They're failed planet-building material, not comet debris.
Moons escaped their planets — Wrong. Asteroids aren't escaped moons—they're primordial material that never formed planets due to Jupiter's gravitational disruption.
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