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 Clyde Tombaugh Clyde Tombaugh /ˈklaɪd tɒmˈbɔː/

noun

  1. United States astronomer who discovered the planet Pluto (1906-1997)  ( Clyde Tombaugh , Clyde William Tombaugh , Tombaugh )
    United States astronomer who discovered the planet Pluto (1906-1997)