Pluto Day is celebrated on February 18th each year, marking the anniversary of the discovery of the dwarf planet Pluto. Pluto was officially discovered by American astronomer Clyde Tombaugh on February 18, 1930, at the Lowell Observatory in Flagstaff, Arizona.
Pluto was initially classified as the ninth planet in our solar system, but in 2006, the International Astronomical Union (IAU) reclassified it as a "dwarf planet" due to its size and characteristics differing from the traditional definition of a planet.
Pluto Day is an opportunity to commemorate the history of Pluto's discovery and its subsequent reclassification. It also serves as a reminder of the ongoing exploration and study of the outer reaches of our solar system. Astronomy enthusiasts, educators, and space organizations may use this day to engage in activities, events, or discussions about Pluto, the solar system, and the ever-evolving field of planetary science.
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