Pluto was discovered by American astronomer Clyde Tombaugh at the Lowell Observatory in Flagstaff, Arizona, on February 18, 1930.
In which of the following year, the distant planet of solar system, Pluto was discovered by Tombaugh:
Asked in APPSC Draughtman 2008 · Topic: Astronomy and Astrophysics Basics (Planetary Science: Planets, Moons, Asteroids, Comets)
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