Outer Solar System Possibly Shaped by a Stellar Fly-by

@article{Pfalzner2018OuterSS,
  title={Outer Solar System Possibly Shaped by a Stellar Fly-by},
  author={Susanne Pfalzner and Asmita Bhandare and Kirsten Vincke and Pedro Lacerda},
  journal={The Astrophysical Journal},
  year={2018},
  volume={863}
}
The planets of our solar system formed from a gas-dust disk. However, there are some properties of the solar system that are peculiar in this context. First, the cumulative mass of all objects beyond Neptune (trans-Neptunian objects [TNOs]) is only a fraction of what one would expect. Second, unlike the planets themselves, the TNOs do not orbit on coplanar, circular orbits around the Sun, but move mostly on inclined, eccentric orbits and are distributed in a complex way. This implies that some… 

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