三、关于科学假设:科学假设亦要有根据由提丢斯(Titius)在1766年提出,波得(Bode)在1772年总结并发表的提丢斯—波得定则(以下简称提—波定则)认为行星至太阳的平均距离(以天文单位表示)an与如下数列相符:0.4+0.3×2n-2。n是离太阳由近及远的次序(但水星n=-∞为例外)。1781年发现天王星的位置正符合第8项,1801年起发现小行星带与第5项符合, Third, on the scientific hypothesis: the scientific hypothesis should also be based on Titius in 1766, Bode summarized and published in 1772 Titus - Porter rule (hereinafter referred to as mention wave Rule) that the average distance from planets to the sun (in astronomical units) an matches the following series: 0.4 + 0.3 × 2n-2. n is near and far from the sun (except for Mercury n = -∞). The discovery of Uranus in 1781 is in line with item 8, and in 1801 the asteroid belt was found to be in line with item 5,