Title: The man who discovered Pluto
Description: Recounts the story of Clyde Tombaugh and how he discovered the hidden planet we now call Pluto.
Subjects: Juvenile literature, Astronomers, Biography, History, Astronomes, Biographies, Ouvrages pour la jeunesse, Histoire
Places: United States, Pluto (Dwarf planet), États-Unis, Pluton (Planète naine)
People: Clyde William Tombaugh (1906-1997)
Time periods: 20th century, 20e siècle