[DOC] [TLE] Clyde Tombaugh - Wikipedia [PAR] Clyde William Tombaugh was an American astronomer. He discovered Pluto in 
1930, the first object to be discovered in what would later be identified as the 
Kuiper belt. At the time of discovery, Pluto was considered a planet but was later 
... In order to better test his telescope mirrors, Tombaugh, with just a pick and 
shovel,... [DOC] [TLE] Pluto's history - Chicago Tribune [PAR] Jul 14, 2015 ... Here's a rundown on Pluto, a 20th-century discovery about to become ... Pluto is 
the only planet (OK, now former planet) in our solar system discovered by an 
American. Astronomer Clyde Tombaugh spotted the dot in 1930 from Lowell ... It's 
named after the late Dutch-American astronomer Gerard Kuiper,... [DOC] [TLE] This date in science: Clyde Tombaugh, discoverer of Pluto - EarthSky [PAR] Feb 4, 2016 ... This is the 110th anniversary of Clyde Tombaugh's birth. ... Today is the 110th 
birthday of American astronomer Clyde W. Tombaugh, who discovered the planet 
Pluto. ... It's said that, after his family's crops were destroyed by a hailstorm, ... 
from one of nine major planets in our solar system to dwarf planet. [DOC] [TLE] Clyde Tombaugh: Astronomer Who Discovered Pluto - Space.com [PAR] Feb 15, 2013 ... Clyde Tombaugh, discoverer of Pluto, peers into an instrument. ... Not long after 
its discovery in 1781, the new planet Uranus was found to have strange 
movements that could only be attributed to another body. Neptune's ... New Dwarf 
Planet Found in Our Solar System; Global Mosaic of Pluto in True Color... [DOC] [TLE] Discovering the Edge of the Solar System  American Scientist [PAR] The last planet to be discovered in our solar system was Pluto, found by Clyde 
Tombaugh nearly 75 years ago. Pluto lay just beyond the most distant gas giants, 
Uranus and Neptune, and its discovery suggested to astronomers that the edge 
of the solar system had yet to be found. What's more, Pluto has some strange... [DOC] [TLE] Clyde Tombaugh | American astronomer | Britannica.com [PAR] Oct 3, 2016 ... American astronomer who discovered Pluto in 1930 after a ... JOIN; LOGIN; 
Activate Your Free Trial! ... Tombaugh initially had no formal training in astronomy
, only a keen ... of the planet was pitted with craters as a result of its proximity to 
the ... large, distant member of the solar system that formerly was... [DOC] [TLE] Clyde Tombaugh ashes will be first to leave solar system - Telegraph [PAR] Jul 14, 2015 ... Clyde Tombaugh ashes will be first to leave solar system ... The man who 
discovered Pluto will become the first human to have his ... of American Clyde W. 
Tombaugh, discoverer of Pluto and the solar ... Only Voyager has crossed into 
interstellar space. ... The Red Planet: 50 years of photographing Mars... [DOC] [TLE] 80 Years of Pluto - New Horizons - The Johns Hopkins University ... [PAR] After all, the planet Neptune had been discovered in 1846 by examining ... 
Tombaugh was fortunate to find Pluto after only searching for a few months. ... 
Observatory because its first two letters were the initials of Percival Lowell. ... In 
February 1930, American astronomer Clyde Tombaugh discovered our solar 
system's ninth... [DOC] [TLE] Clyde Tombaugh - StarChild - NASA [PAR] Clyde Tombaugh discovered Pluto years before he ever attended college! ... The 
telescope Clyde built in 1925 was only the first of more than thirty telescopes ... 
For many years, Pluto was considered to be the ninth planet in our solar system. [DOC] [TLE] When Was the Dwarf Planet Pluto Discovered? - 20th Century History [PAR] On February 18, 1930, Clyde W. Tombaugh, an assistant at the Lowell ... over 
seven decades, Pluto was considered the ninth planet of our solar system. The 
Discovery. It was American astronomer Percival Lowell who first thought there 
might be ... its discovery, Pluto was considered to be the ninth planet in the solar 
system. [DOC] [TLE] Streator celebrates hometown hero, Pluto discoverer | Chicago Sun ... [PAR] Jul 15, 2015 ... Pluto is the only planet

Question: It's the only planet in our solar system discovered by an American, Clyde Tombaugh
Answer: Pluto