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André Izidoro et al 2016 ApJ 833 40

The orbits of the asteroids in our solar system may have been excited to their current state if Jupiter’s and Saturn’s early orbits were chaotic, and the gas giants only later moved to their current orbits.

Sota Arakawa and Taishi Nakamoto 2016 ApJL 832 L19

A solar system model is put forward in which nm-sized silicate grains are produced by evaporation and recondensation events in early solar nebula, and these nanograins aggregate into rocky planetesimals.

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