Planet X in Washington
Before Pluto was given a name it was called "Planet X". Historically,
Because a slight perturbation remained in the orbits of the known planets in 1846, it was surmised that another planet might exist beyond Neptune. Percival Lowell made a rough calculation of the likely location of the speculated planet. He used a telescope located in Arizona to search for the unknown planet. But by the time of Lowell's death, in the year 1916, he had not found his Planet "X." In the year 1929, astronomers at the Lowell Observatory in Flagstaff, Arizona decided to once more initiate Lowell's search for Planet "X." Using an involved approach which considered star-field's, Clyde Tombaugh, an amateur astronomer who used the new telescope at the Lowell Observatory was able to photograph Pluto in the year 1930. The planet Tombaugh found was named Pluto.
The idea of deducing the existence of an object by its effect is the stuff of mystery. Ultimately in the case of Pluto, its discovery turned out to hinge on pure dumb luck. Wikipedia notes: "Ironically, Pluto is far too small to have the effect on Neptune's orbit that initiated the search. The discrepancies in Neptune's orbit observed by 19th century astronomers were due instead to inaccurate estimates of Neptune's mass. Once found, Pluto's faintness and lack of a visible disk cast doubt on the idea that it could be Percival Lowell's Planet X. Lowell had made a prediction of Pluto's position in 1915 which was fairly close to its actual position at that time; however, Ernest W. Brown concluded almost immediately that this was a coincidence, and this view is still held today."
But inferring the unseen from its tides is the only method left us to understand the Plame-Wilson affair. Ron Rosenbaum at Pajamas says that just when he had it figured out, the whole collapsed into a drama almost "Joycean in its complexity". The man whose obsession it has seemingly become, Tom Maguire in Just One Minute, takes us through the testimonies of all concerned in "Armitage: I Don't Remember What I Said, But Novak Is Wrong" and Novak "Would Hope" Bush Would Pardon Libby. Question: is there any unseen planet producing these strange effects or are we just watching cracked rocks careening through the cosmic billiard table of space?