1. S. T. Jaki:Am. J. Phys.,40, 1014 (1972).
2. The symbols for the planets are explained under fig. 1.
3. H. N. Russell, R. S. Dugan andJ. Q. Steward:Astronomy, Vol.1 (Boston, Mass., 1926), p. 235;R. Kurth:Introduction to the Mechanics of the Solar System (London, 1959), p. 12.
4. See,e. g.,G. P. Kuiper: inAstrophysics (New York, N. Y., 1951), p. 417.
5. J. G. Hills:Nature (London),225, 840 (1970).