Nature Astronomy, Published online: 15 August 2024; doi:10.1038/s41550-024-02341-5

Early in the history of the Solar System, the giant planets — including Jupiter and Saturn — migrated under gravity into different orbits around the Sun, causing an epoch of chaos and collisions. Radioactive isotopes in asteroids record the thermal imprint of these collisions, and a broad survey of meteorites now constrains the timing of the migration to approximately 11 million years after the Solar System formed.

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