SOLAR SYSTEM

Detailed explanation-1: -Discovered in 1930, Pluto was long considered our solar system’s ninth planet. But after the discovery of similar intriguing worlds deeper in the distant Kuiper Belt, icy Pluto was reclassified as a dwarf planet. Pluto is only about 1, 400 miles wide.

Detailed explanation-2: -Pluto is now classified as a dwarf planet because, while it is large enough to have become spherical, it is not big enough to exert its orbital dominance and clear the neighborhood surrounding its orbit.

Detailed explanation-3: -According to the IAU, Pluto is technically a “dwarf planet, ‘’ because it has not “cleared its neighboring region of other objects.” This means that Pluto still has lots of asteroids and other space rocks along its flight path, rather than having absorbed them over time, like the larger planets have done.

Detailed explanation-4: -Dwarf planet Pluto On August 24, 2006, the International Astronomical Union (IAU) announced it had re-classified Pluto as a dwarf planet. From 1930 until then, Pluto had been considered a normal planet and the outermost planet of the solar system.