Hit-and-run planetary collisions

Erik Asphaug, Craig B. Agnor, Quentin Williams

Research output: Contribution to journalArticle

163 Citations (Scopus)

Abstract

Terrestrial planet formation is believed to have concluded in our Solar System with about 10 million to 100 million years of giant impacts, where hundreds of Moon- to Mars-sized planetary embryos acquired random velocities through gravitational encounters and resonances with one another and with Jupiter. This led to planet-crossing orbits and collisions that produced the four terrestrial planets, the Moon and asteroids. But here we show that colliding planets do not simply merge, as is commonly assumed. In many cases, the smaller planet escapes from the collision highly deformed, spun up, depressurized from equilibrium, stripped of its outer layers, and sometimes pulled apart into a chain of diverse objects. Remnants of these 'hit-and-run' collisions are predicted to be common among remnant planet-forming populations, and thus to be relevant to asteroid formation and meteorite petrogenesis.

Original languageEnglish (US)
Pages (from-to)155-160
Number of pages6
JournalNature
Volume439
Issue number7073
DOIs
StatePublished - Jan 12 2006
Externally publishedYes

Fingerprint

Planets
Minor Planets
Meteoroids
Mars
Orbit
Solar System
Embryonic Structures
Population

ASJC Scopus subject areas

  • General

Cite this

Asphaug, E., Agnor, C. B., & Williams, Q. (2006). Hit-and-run planetary collisions. Nature, 439(7073), 155-160. https://doi.org/10.1038/nature04311

Hit-and-run planetary collisions. / Asphaug, Erik; Agnor, Craig B.; Williams, Quentin.

In: Nature, Vol. 439, No. 7073, 12.01.2006, p. 155-160.

Research output: Contribution to journalArticle

Asphaug, E, Agnor, CB & Williams, Q 2006, 'Hit-and-run planetary collisions', Nature, vol. 439, no. 7073, pp. 155-160. https://doi.org/10.1038/nature04311
Asphaug E, Agnor CB, Williams Q. Hit-and-run planetary collisions. Nature. 2006 Jan 12;439(7073):155-160. https://doi.org/10.1038/nature04311
Asphaug, Erik ; Agnor, Craig B. ; Williams, Quentin. / Hit-and-run planetary collisions. In: Nature. 2006 ; Vol. 439, No. 7073. pp. 155-160.
@article{eff4529ec2784ccb9efb5b60ee1c03a8,
title = "Hit-and-run planetary collisions",
abstract = "Terrestrial planet formation is believed to have concluded in our Solar System with about 10 million to 100 million years of giant impacts, where hundreds of Moon- to Mars-sized planetary embryos acquired random velocities through gravitational encounters and resonances with one another and with Jupiter. This led to planet-crossing orbits and collisions that produced the four terrestrial planets, the Moon and asteroids. But here we show that colliding planets do not simply merge, as is commonly assumed. In many cases, the smaller planet escapes from the collision highly deformed, spun up, depressurized from equilibrium, stripped of its outer layers, and sometimes pulled apart into a chain of diverse objects. Remnants of these 'hit-and-run' collisions are predicted to be common among remnant planet-forming populations, and thus to be relevant to asteroid formation and meteorite petrogenesis.",
author = "Erik Asphaug and Agnor, {Craig B.} and Quentin Williams",
year = "2006",
month = "1",
day = "12",
doi = "10.1038/nature04311",
language = "English (US)",
volume = "439",
pages = "155--160",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7073",

}

TY - JOUR

T1 - Hit-and-run planetary collisions

AU - Asphaug, Erik

AU - Agnor, Craig B.

AU - Williams, Quentin

PY - 2006/1/12

Y1 - 2006/1/12

N2 - Terrestrial planet formation is believed to have concluded in our Solar System with about 10 million to 100 million years of giant impacts, where hundreds of Moon- to Mars-sized planetary embryos acquired random velocities through gravitational encounters and resonances with one another and with Jupiter. This led to planet-crossing orbits and collisions that produced the four terrestrial planets, the Moon and asteroids. But here we show that colliding planets do not simply merge, as is commonly assumed. In many cases, the smaller planet escapes from the collision highly deformed, spun up, depressurized from equilibrium, stripped of its outer layers, and sometimes pulled apart into a chain of diverse objects. Remnants of these 'hit-and-run' collisions are predicted to be common among remnant planet-forming populations, and thus to be relevant to asteroid formation and meteorite petrogenesis.

AB - Terrestrial planet formation is believed to have concluded in our Solar System with about 10 million to 100 million years of giant impacts, where hundreds of Moon- to Mars-sized planetary embryos acquired random velocities through gravitational encounters and resonances with one another and with Jupiter. This led to planet-crossing orbits and collisions that produced the four terrestrial planets, the Moon and asteroids. But here we show that colliding planets do not simply merge, as is commonly assumed. In many cases, the smaller planet escapes from the collision highly deformed, spun up, depressurized from equilibrium, stripped of its outer layers, and sometimes pulled apart into a chain of diverse objects. Remnants of these 'hit-and-run' collisions are predicted to be common among remnant planet-forming populations, and thus to be relevant to asteroid formation and meteorite petrogenesis.

UR - http://www.scopus.com/inward/record.url?scp=30544449823&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=30544449823&partnerID=8YFLogxK

U2 - 10.1038/nature04311

DO - 10.1038/nature04311

M3 - Article

VL - 439

SP - 155

EP - 160

JO - Nature

JF - Nature

SN - 0028-0836

IS - 7073

ER -