# Conundrums and constraints concerning the formation of our solar system -- An alternative view

## TL;DR

This paper proposes an alternative, nonviolent model for solar system formation that avoids early resonances, migrations, and instabilities, aligning better with observed small body distributions and avoiding issues faced by violent formation theories.

## Contribution

It introduces a nonviolent, protoplanetary evolution model that explains small body distributions without early violent events or instabilities.

## Key findings

- The model explains the stability of the asteroid belt.
- It accounts for differences between Trojans and Kuiper belt objects.
- It aligns with the observed lack of early planetary migrations.

## Abstract

We have proposed an alternative model for the formation of our solar system that does not predict any mean-motion resonant interactions, planetary migrations, or self-gravitating instabilities in the very early isothermal solar nebula and before the protosun has formed. Within this context of nonviolent protoplanetary evolution over more than 10 million years, we examine some conundrums and constraints that have been discovered from studies of small bodies in the present-day solar system (Jupiter and Neptune's Trojans and their differences from Kuiper belt objects, the irregular satellites of gaseous giants, the stability of the main asteroid belt, and the Late Heavy Bombardment). These issues that have caused substantial difficulties to models of violent formation do not appear to be problematic for the alternative model, and the reason is the complete lack of violent events during the evolution of protoplanets.