Evolution of the Uranus-Neptune planetesimal swarm: Consequences for the Earth

Details Evolution of the Uranus-Neptune planetesimal swarm: Consequences for the Earth Evolution of the Uranus-Neptune planetesimal swarm: Consequences for the Earth

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pggp.rept...37s&link_type=abstract

In NASA. Washington Repts. of Planetary Geol. Program p 37 (SEE N84-23431 13-91)

Physics

2

Moisture Content, Planetary Evolution, Protoplanets, Solar System, Comets, Jupiter (Planet), Meteoroid Showers, Monte Carlo Method, Oort Cloud, Perturbation, Planetary Mass

Scientific paper

The evolution of planetesimals in the outer Solar System were evaluated, both stellar and planetary encounters. About 20% of the Uranus-Neptune planetesimals (UNP's) enter the comet cloud and are stored primarily in the region inside the observational limits of the Oort cloud. Half of the comets have suruived to the present time; the cloud now has a mass of the order of Jupiter's mass. Most UNP's are ejected from the Solar system, and about half of the planetesimal swarm is passed to the control of Jupiter prior to ejection. Jupiter's perturbations drive a large flux of these planetesimals into Earth-crossing orbits, and it now appears highly probable that UNP's account for most of the heavy bombardment of the Moon and Earth.

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