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Tombaugh
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1997 Clyde Tombaugh, astronomer, discovered Pluto in 1930, dies at 90
1930 Clyde Tombaugh announces discovery of Pluto at Lowell Observatory 1930 U.S. astronomer Clyde Tombaugh discovers Pluto 1930 Clyde Tombaugh photographs planet Pluto 1906 Clyde William Tombaugh, U.S., astronomer, discovered Pluto |
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