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.

中文翻译：

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太阳系原行星盘分散后不久，巨行星就发生了迁移


在太阳系历史的早期，包括木星和土星在内的巨型行星在重力作用下迁移到围绕太阳的不同轨道，造成了混乱和碰撞的时代。小行星中的放射性同位素记录了这些碰撞的热印记，并且对陨石的广泛调查现在将迁移的时间限制在太阳系形成后大约 1100 万年。