Pluto is a dwarf planet in the Kuiper belt, discovered in 1930. It was named after the Roman god of the underworld. Pluto's discovery expanded our understanding of the solar system beyond Neptune.
Pluto was discovered by American astronomer Clyde Tombaugh at the Lowell Observatory in Arizona. He used a technique called blink comparison to find Pluto among photographic plates.
Pluto has a highly elliptical orbit and takes 248 years to complete one revolution around the Sun. It has five known moons, the largest being Charon.
Despite being reclassified as a dwarf planet in 2006, Pluto remains an important object in the study of the outer solar system.