SOLAR SYSTEM

Detailed explanation-1: -A dwarf planet is large enough that its gravity can pull it into a roughly spherical shape, but not large enough to clear its orbit around the Sun of other objects.

Detailed explanation-2: -According to the International Astronomical Union, a dwarf planet is round and circles the Sun like a planet, but has not “cleared the neighborhood” around its orbit.

Detailed explanation-3: -A planet is round because of gravity. A planet’s gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle.

Detailed explanation-4: -Dwarf planets are a lot like regular planets: They both have enough mass and gravity to be nearly round-unlike odd-shaped asteroids.

Detailed explanation-5: -Pluto is the largest known body in the Kuiper Belt with enough mass to exhibit a spherical shape. Even though Pluto has enough mass to give it a spherical shape, Pluto is in fact smaller in physical size than seven of the solar system’s moons, including Earth’s.