4 February

27 FEAB. 2004 Dáta foilsithe 2214 Amhairc

1906: On 4 February 1906, Clyde W. Tombaugh was born.

Tombaugh was an American astronomer who discovered the planet Pluto in 1930. It was the only planet discovered in the twentieth century, after a systematic search instigated by the predictions of other astronomers.


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