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Clyde William Tombaugh was an American astronomer. Although he is best known for discovering the dwarf planet Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt, Tombaugh also discovered many asteroids; he also called for the serious scientific research of unidentified flying objects, or UFOs....
 
 
Clyde William Tombaugh was an American astronomer. Although he is best known for discovering the dwarf planet Pluto in 1930, the first object to be discovered in what would later be identified as the Kuiper belt, Tombaugh also discovered many asteroids; he also called for the serious scientific research of unidentified flying objects, or UFOs....

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  Pluto, 9th (Dwarf) Planet from the Sun
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of icy trans-Neptunian objects. It was the first such object to be discovered. It is the largest and second-most massive known dwarf planet in the Solar Syste...
 
    Gerard Kuiper, Prediction of the Kuiper Belt
  Gerard Kuiper, Prediction of the Kuiper Belt
Kuiper is considered to be the father of modern planetary science for his wide ranging studies of the solar system. Although he contributed to astrophysics, established the atmosphere of Saturn's moon Titan, and discovered Saturn's moon Miranda and N...
 
       
         
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