SOLAR SYSTEM

Detailed explanation-1: -April 22, 2015. According to the International Astronomical Union, which sets definitions for planetary science, a dwarf planet is a celestial body that-orbits the sun, has enough mass to assume a nearly round shape, has not cleared the neighborhood around its orbit and is not a moon.

Detailed explanation-2: -A while back, Pluto was the ninth planet from the Sun. It was also the smallest planet.

Detailed explanation-3: -The best-known dwarf planet, Pluto is also the largest in size and the second largest in mass. Pluto has five moons. The largest, Charon, is over half the size of its host.