IAU definition of planet who had theorized on the existence of the large trans-Neptunian object Planet X, and Tombaugh been searching for Planet X when he found Pluto. Almost immediately after its discovery, however, astronomers questioned whether Pluto could be Planet X. Willy Ley wrote a column in 1956 titled "The Demotion of Pluto", stating that it "simply failed to live up to the advance publicity it received as 'Planet X' before its discovery. It has been a disappointment all along, for it did not turn out to be what one could reasonably have expected". In 1978, Pluto's moon Charon was discovered. By measuring
The Adventures of Pluto Nash has killed both Marucci and Runa and established his own criminal enterprise. He also states that he was the one who told his henchmen where Pluto was hiding out due to him also inheriting Pluto's memories. When his henchmen arrive and see both Rex and Pluto, Rex kills Mogan and Kelp for their incompetence. He and Pluto then fight while the others are uncertain which is which. Pluto shoots Bruno, and Belcher (who assumes that Pluto would not damage his own robot) shoots Rex. Pluto orders his men to leave and reveals his identity to Dina by speaking of her