Freya Wrote:
-------------------------------------------------------
>
> Pluto however had to little mass to explain the
> anomaly so it never was resolved and the question
> about one or more heavy bodies has since
> remained.
>
Although the question does remain, the anomalies in Uranus' orbit were eventually explained:

Clyde Tombaugh's discovery of Pluto in 1930 appeared to validate Lowell's hypothesis, and Pluto was officially named the ninth planet. In 1978, Pluto was conclusively determined to be too small for its gravity to affect the giant planets, resulting in a brief search for a tenth planet. The search was largely abandoned in the early 1990s, when a study of measurements made by the Voyager 2 spacecraft found that the irregularities observed in Uranus's orbit were due to a slight overestimation of Neptune's mass.

Wiki

Harte



Edited 1 time(s). Last edit at 23-Jan-16 16:55 by Harte.