Nature Astronomy, Published online: 22 January 2025; doi:10.1038/s41550-024-02471-w

A suborbital experiment indicates that centimetre-sized clusters of tribocharged submillimetre grains resist erosion by individual grains with collision speeds up to around 0.5 m s–1. The stability of these charged clusters allows them to grow larger than uncharged clusters, enabling the formation of planetesimals in protoplanetary disks.

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