Keep your  yeux  have widened their focus, and you can take in more than just words... you're ready for the Movie. Let's say its as if you were on the Space Shuttle, working some screen. At the end of your scheduled task, you pause to look up, out the window. There, slowly revolving around you, is green Planet X, the trans-Neptunian planet whose existence the famous astronomer Percival Lowell guessed at, and which Clyde Tombaugh, hired by the Lowell Observatory, was finally able to prove did not exist. Now pause, and remember the future, you there at your space-shuttle console. Mr. Tombaugh, who appears later in this movie, did discover Pluto, which is beyond Neptune; but in doing so he also managed to prove that it wasn't the exact Planet X that Lowell predicted. Tombaugh's discovery of Pluto, and later observations of trans-Plutonian space, proved that Planet X was not there or anywhere. So if Planet X is under you, and X is not there, then where are you right now?