SOLAR SYSTEM

Detailed explanation-1: -Summary. The four inner planets have shorter orbits, slower spin, no rings, and they are made of rock and metal. The four outer planets have longer orbits, faster spins, a composition of gases and liquids, numerous moons, and rings.

Detailed explanation-2: -Neptune has the longest period of revolution (164 years) around the sun.

Detailed explanation-3: -The inner planets spin slowly whereas the outer planets spin quickly. Inner planets are close to the sun because of which they rotate around the sun quickly and the outer planets are at great distance from the sun due to which they rotate slowly around the sun.

Detailed explanation-4: -Inner planets: the four closet to the sun. They are also called the “terrestrial planets” because they are made mostly of rock and metal. Outer planets: the four farthest from the sun. They are also called the “gas giants” because they are made mostly of gases.