The celestial bodies in our Solar System are divided into different sections: the inner planets of Mercury, Venus, Earth and Mars separated by the asteroid belt from the outer planets of Jupiter, Saturn, Uranus and Neptune. Each celestial body is made of a different type of material: rock, gas or ice. slide 1 of 4.The celestial bodies in our Solar System are divided into two regions, based on the structure and size of the planets. The first region of the Solar System is commonly referred to as the inner planetary area, containing the first four planets, which are rocky worlds.ypes of Celestial Bodies. According to the accepted modern theory, the objects in the Solar System are segmented into three distinct classifications: planets, dwarf planets and other small bodies. Each of these are defined by the International Astronomical Union.