Nature Astronomy, Published online: 26 February 2024; doi:10.1038/s41550-024-02200-3

Numerical simulations of the DART impact on asteroid Didymos’s moon Dimorphos highlight its rubble-pile nature with a low bulk density and boulder volume fraction. These results indicate that Dimorphos formed from reaccumulated material shed from Didymos via rotation or impact.

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