Computer Science
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...89...85t&link_type=abstract
Icarus (ISSN 0019-1035), vol. 89, Jan. 1991, p. 85-92.
Computer Science
36
Gas Giant Planets, Gravitational Collapse, Planetary Structure, Solar System Evolution, Angular Momentum, Eccentric Orbits, Obliqueness, Planets, Gas Planets, Outer Planets, Obliquity, Shape, Timescale, Angular Momentum, Torque, Models, Spin, Calculations, Inclination, Eccentricity, Solar System, Formation, Parameters, Pluto, Orbits, Mercury (Planet), Orbital Elements, Symmetry
Scientific paper
It is presently suggested that if the collapse of a molecular cloud core results in the formation of a protostar surrounded by a protoplanetary disk, and that collapse is nonaxisymmetric, the disk and protostar angular momentum vectors may twist in the process over the course of 0.5 Myr. Should the outer planets form before completion of the infall, their spins may not follow the twist; nonzero obliquities can thereby naturally arise during solar system formation. The excitation of the inclinations and eccentricities of planetary orbits by a twist depends on the characteristics of the twist. The two most directly twist-excited planets are Pluto and Mercury; these are in fact the two planets with greatest inclinations and eccentricities.
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