New concept: "Planetary collisions," submitted by Renu Malhotra (LPL, UA) 6/23/2017

[katieefrey]

KF -- Fits under.... "Celestial mechanics"? It doesn't really have a good home in "Solar system astronomy" possibly "Exoplanets"?

[katieefrey]

ADS search "planetary collisions" results in 114 refereed articles, 152 non-refereed articles, most within last 10 years.

related keywords planets and satellites: formation planets and satellites: dynamical evolution and stability Moon/moons/exomoons

related articles https://ui.adsabs.harvard.edu/abs/2019ApJ...882...35V/abstract https://ui.adsabs.harvard.edu/abs/2019arXiv190412854M/abstract https://ui.adsabs.harvard.edu/abs/2018ApJ...861...52K/abstract https://ui.adsabs.harvard.edu/abs/2017MNRAS.466.4868B/abstract

Hierarchical placement? Exoplanet astronomy --> Planetary collisions Planetary science --> Planetary collisions

Related Terms Planetary formation Exoplanet formation Satellite formation

Other Notes Exoplanet formation & Planetary formation should be Related terms Satellite formation should be a Related term of Natural satellites (both solar & exo) Rename Satellite formation to Natural satellite formation?

[BartlettAstro]

This concept appears to be mostly fleshed out but requires a definition. I would also like someone from planetary science to review before final acceptance.

Items under Other Notes should be separate issues.

[BartlettAstro]

Further offline comments from @sjarmak indicate that this requires some additional thought.

[sjarmak]

I would recommend putting it as,

• Solar System Astronomy
  • Planetary Science
    • Planetary Dynamics -Collisional Processes

As well as,

• Exoplanet Astronomy
  • Exoplanet dynamics
    • Collisional Processes

I would also recommend that Planetary Science be moved to a hierarchy above Solar System astronomy, but that is a separate issue.