Hit-and-Run as Planets Formed

Details Hit-and-Run as Planets Formed Hit-and-Run as Planets Formed

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006psrd.repte.111t&link_type=abstract

Planetary Science Research Discoveries

Physics

Planet, Formation, Collision, Impact, Protoplanet, Asteroid, Differentiation, Accretion

Scientific paper

Planet formation involved collisions between Moon-sized or larger protoplanets to make even bigger ones. However, planet growth is not the only result of the collisions. Erik Asphaug, Craig Agnor, and Quentin Williams (University of California, Santa Cruz) point out that many protoplanet interactions were what they call "hit-and-run" collisions, causing substantial effects on the bodies, particularly on the smaller one. The effects might have included widespread melting, disruption, and formation of an assortment of metal-rich objects that might be found among asteroids and meteorites. Their ideas give cosmochemists a whole new way of looking at asteroid formation and planetary differentiation.

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