Pluto is a dwarf planet located in the outer region of our solar system. It was discovered in 1930 and was originally classified as the ninth planet. However, in 2006, the International Astronomical Union redefined the criteria for planet classification, leading to Pluto's reclassification as a dwarf planet. Pluto has a highly elliptical orbit that takes about 248 Earth years to complete. It is primarily composed of ice and rock and has five known moons, with the largest being Charon. Pluto's surface features include mountains, valleys, and plains, making it a fascinating object of study in planetary science.