Story perspectives

Giant planets can eject planets, disturb Uranus moons

6/11/2026

Summary

Story summary

Matthew Clement and his team published study showing giant planets can eject a planet, destabilize Uranus’s moons, yet leave Jupiter’s moons intact.
Analyzing 122 simulations from 100,000 models that tracked giant planets and 1,000 planetesimals for 20 million years, they found most runs destabilized Uranus’s moons while Jupiter’s moons stayed stable.
Only a single-extra-ice-giant scenario let both moon systems survive, prompting the authors to suggest the Nice model may need revision.

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Story summary

Matthew Clement and his team published study showing giant planets can eject a planet, destabilize Uranus’s moons, yet leave Jupiter’s moons intact.
Analyzing 122 simulations from 100,000 models that tracked giant planets and 1,000 planetesimals for 20 million years, they found most runs destabilized Uranus’s moons while Jupiter’s moons stayed stable.
Only a single-extra-ice-giant scenario let both moon systems survive, prompting the authors to suggest the Nice model may need revision.