Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p21b1658l&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P21B-1658
Physics
[6224] Planetary Sciences: Solar System Objects / Kuiper Belt Objects, [6299] Planetary Sciences: Solar System Objects / General Or Miscellaneous
Scientific paper
Beyond Neptune the eccentricity of orbital objects significantly increases with distance (2009 AGU Fall Meeting). The eccentricity eventually reaches the critical value of 1.0 at about 300AU (4.6E+10 Km), where elliptic orbits will change to hyperbolas. This observation predicts that planets leave the Solar system when they reach the limiting distance. In this presentation, this observation is quantitatively modeled and a physical explanation for the increase of eccentricity with increasing planetary orbits is suggested. The model is based on the interaction of the gravitational fields of the Sun and the Milky Way galaxy. Previously a quantitative model was presented for the rate of the decrease of the solar gravitational field with time. This loss is caused by solar mass and gravity loss by radiation and solar wind. With time the solar gravitational field decreases relative to the gravitational attraction of planets by the Milky Way. It is shown that the increasing power of the galactic gravitation is expanding planetary orbits near the galaxy, which eventually breaks the adhesion of the planets from the solar system. On the opposite side of the Sun, the gravitational forces of the Sun and the galaxy combine to enhance the planetary adhesion. The result is an increase of ellipticity of planetary orbits which increases with distance from the Sun. The experimental and model results preclude the existence of an Oort cloud beyond the limiting escape distance.
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