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18 February 1930: Clyde Tombaugh discovers Pluto

In 60 words

On 18 February 1930, the young astronomer Clyde Tombaugh found Pluto by comparing photographs of the night sky at the Lowell Observatory in Arizona. The name was suggested by an 11-year-old girl in England, Venetia Burney. Pluto was reclassified as a dwarf planet in 2006.