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KUIPER BELT

New clues to planet formation

Most binary Kuiper belt objects orbit each other in the same direction as their orbit around the Sun. New computer simulations show that such orbits may be a fingerprint of planetesimal formation from collapsing clumps of pebbles.

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Fig. 1: Formation of two prograde planetesimal binaries through the streaming instability.

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Correspondence to Anders Johansen.

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Johansen, A. New clues to planet formation. Nat Astron 3, 794–795 (2019). https://doi.org/10.1038/s41550-019-0855-3

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