Abstract
The discovery1 that Pluto's mass is insufficient to explain the discrepancies in the motions of the outer planets has led to the prediction of a tenth planet (planet X) of mass ∼1–5 M⊕ beyond the orbit of Pluto (50–100 AU)2,3. Further, the existence of a belt or disk of comets beyond the orbit of Neptune (≳35 AU) has been proposed in connection with some theories of the origin of the Solar System4,5 as a possible source of short-period comets6 and indirectly as a source of long-period comets7,8. Here we point out that the existence of both planet X and the comet disk at their expected distances may explain not only the observed planetary motions and the origin of comets, but also the recently reported 28-Myr periodicity in terrestrial cratering9–11 and in mass extinctions11,12. The cratering period is associated with the precession of the perihelion of planet X caused by the perturbations of the outer planets.
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References
Harrington, R. S. & Christy, J. W. Astr. J. 86, 442–443 (1981).
Van Flandern, T. C., Kaplan, G. H., Plukkinen, K. F., Santoro, E. J. & Seidelmann, P. K. Bull. Am. Astr. Soc. 12, 830 (1980).
Abell, G. O. Exploration of the Universe, 349 (Saunders, Philadelphia, 1982).
Kuiper, G. P. Astrophysics (ed. Hynek, J. A.) (McGraw-Hill, New York, 1951).
Whipple, F. L. The Motion, Evolution and Orbits and Origins of Comets, IAU Symp. 45, 401–408 (1972).
Fernandez, J. A. Mon. Not. R. astr. Soc. 192, 481–491 (1980).
Shoemaker, E. M. & Wolfe, R. F. Preprint (paper presented at the Fifteenth Lunar and Planetary Science Conference, 1984).
Fernandez, J. A. Preprint (paper presented at IAU Colloquium 83, 1984).
Alvarez, W. & Muller, R. A. Nature 308, 718–720 (1984).
Rampino, M. R. & Strothers, R. B., Nature 308, 709–712 (1984).
Sepkoski, J. J. & Raup, D. M. in Dynamics of Extinction (ed. Elliott, D. ) (Wiley, New York, in the press).
Raup, D. M. & Sepkoski, J. J. Proc. natn. Acad. Sci. U.S.A. 81, 801–805 (1984).
Roy, A. E. Orbital Motion, 285 (Wiley, New York, 1978).
Reynolds, R. T., Tarter, J. C. & Walker, R. G. Icarus 44, 772–779 (1980).
Hamid, S. E., Marsden, B. G. & Whipple, F. L. Astr. J. 73, 727–729 (1968).
Bailey, M. E. Mon. Not. R. astr. Soc. 205, 47P–52P (1983).
Bailey, M. E. Nature 302, 399–400 (1983).
Hills, J. G. Astr. J. 86, 1730–1740 (1981).
Bailey, M. E. Mon. Not. R. astr. Soc. 204, 603–633 (1983).
Lin, D. N. C. & Papaloizou, J. Mon. Not. R. astr. Soc. 186, 799–812 (1979).
Everhart, E. Comets-Meteorites-Asteroids: Interrelations, Evolution and Origin (ed. Delsemme, A. H. ) 99–104 (University of Toledo, Ohio, 1977).
Fernandez, J. A. Astr. Astrophys. 135, 129–134 (1984).
Weissman, P. R. Geol. Soc. Am. spec. Pap. 190, 15–24 (1982).
Grieve, R. A. F. & Dence, M. R. Icarus 38, 230–242 (1979).
Shoemaker, E. M. & Wolfe, R. F. in The Satellites of Jupiter (eds Morrison, D. & Matthews, M. S.) 277–339 (University of Arizona Press, Tucson, 1982).
Wetherill, G. W. & Shoemaker, E. M. Geol. Soc. Am. spec. Pap. 190 1–13 (1982).
Whitmire, D. P. & Jackson, A. A. Nature 308, 713–715 (1984).
Davis, M., Hut, P. & Muller, R. Nature 308, 715–717 (1984).
Hut, P. Nature 311, 638–641 (1984).
Hills, J. Nature 311, 636–638 (1984).
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Whitmire, D., Matese, J. Periodic comet showers and planet X. Nature 313, 36–38 (1985). https://doi.org/10.1038/313036a0
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DOI: https://doi.org/10.1038/313036a0
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