Dust Trap Beyond Jupiter Served as Long-Lived Nursery for Diverse Planetesimals

Simulations by the Max Planck Institute for Solar System Research reveal that a high-pressure ring just beyond Jupiter’s orbit acted as a persistent dust trap. Over roughly two million years it produced planetesimals with distinct compositions, matching known meteorite groups.

Science DailyMysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

Around 4.6 billion years ago the Sun was surrounded by a gas-rich protoplanetary disk. As Jupiter grew it cleared a gap, generating a pressure bump beyond its orbit that halted inward-drifting solids and created the dust trap.

Mysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

The model focuses on 2–4 Myr after Solar System formation. The first planetesimals appear ~2.3 Myr after calcium-aluminum-rich inclusions, producing matrix-poor bodies (CO, CV). Later, an influx of fine-grained dust yields matrix-rich groups (CM, CI). A brief shift <0.1 Myr creates the CR and TL families.

Mysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

Linking meteorite chemistry to a single disk substructure supports dust traps as primary planetesimal factories. The findings provide a testable framework for interpreting the diverse ringed structures now observed in young stars.

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Drazkowska said the region offered “excellent conditions” for planetesimal formation. Kleine noted the simulations “accurately reproduce” laboratory meteorite results, making meteorites a “touchstone” for formation theories. Gurrutxaga stressed modeling both fragile and rigid materials across scales. Drazkowska added that “strong evidence” backs dust traps as preferred birthplaces.

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The authors acknowledge that the model omits detailed late-stage chondrule formation and that the meteorite record may not reflect the original abundance of parent bodies. They caution that the study does not claim a final answer for all aspects of planetesimal origin.

Mysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

• “Different types of planetesimals apparently formed in the same region of the early dust and gas disk, only at different times. The region just outside Jupiter's orbit offered excellent conditions for this,” — Joanna Drazkowska, head of the Lise Meitner Group

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• “For the first time, we have succeeded in accurately reproducing the results of laboratory studies of meteorites using computer simulations of the early Solar System. The meteorites serve, so to speak, as a touchstone for theories of planetary formation” — Thorsten Kleine, MPS Director and cosmochemist

Mysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

• “For our simulations, it was crucial to model the behavior and interaction of both materials on both small and large scales” — Nerea Gurrutxaga, PhD student, first author

Mysterious dust ring beyond Jupiter formed many of our Solar System’s earliest worlds

• “There is strong evidence that dust traps were the preferred birthplace of planetesimals in our Solar System,” — Joanna Drazkowska

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