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  1. Tombaugh died on January 17, 1997, in Las Cruces, New Mexico, at the age of 90, and he was cremated. A small portion of his ashes was placed aboard the New Horizons spacecraft. The container includes the inscription: "Interred herein are remains of American Clyde W. Tombaugh, discoverer of Pluto and the Solar System's 'third zone'.

  2. Mar 20, 1980 · But first we join Clyde Tombaugh in Las Cruces, New Mexico, exactly 50 years to the day of his discovery, at a banquet to honour the only living man who has discovered a new planet. (1980) Show...

  3. Dwarf planet Pluto was discovered by Clyde Tombaugh at Lowell Observatory in Flagstaff, Arizona, US on 18 February 1930. Though he would go on to earn degrees in astronomy from the University of Kansas, at the time he was a young amateur astronomer who lacked any formal astronomy training.

  4. Mar 23, 2002 · At 24 and with no formal education in astronomy, Clyde William Tombaugh set out to find "Planet X." By S. Alan Stern | Published: March 23, 2002 | Last updated on May 18, 2023. The faint,...

  5. Clyde Tombaugh (born February 4, 1906, Streator, Illinois, U.S.—died January 17, 1997, Las Cruces, New Mexico) was an American astronomer who discovered Pluto in 1930 after a systematic search for a ninth planet instigated by the predictions of other astronomers.

    • The Editors of Encyclopaedia Britannica
  6. Clyde William Tombaugh (February 4, 1906 – January 17, 1997) was an American astronomer. He discovered Pluto in 1930.

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  8. Clyde Tombaugh - The Discoverer of Pluto On February 18 at 4:00 p.m., after retrofitting a 13-inch telescope at Flagstaff, Arizona’s Lowell Observatory, Tombaugh confirmed the existence of Planet X, which was later officially named “Pluto,” after the Roman god of the underworld.

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