Asteroid and Comet as small bodies
Asteroid is a metal or stone celestial body. Diameter is greater than one meter up to 1.000 kilometers. Some of them, individually or in groups of similar body, moves around the Sun. Most of them goes around the Sun in the main Asteroid belt between Mars and Jupiter. Part of Asteroid approaches the Sun closer than Mars and Earth. In the orbit of Jupiter or other Planets is also part of the movement. Many are usually irregularly shaped and smaller than the Planet. They are formed from the remnants of the protoplanetary material. That material has not merged with Planets during the creation of the Solar System from the protoplanetary disk. Most often circling the Sun on their own path or as Moons of larger Planets. Some of them are bound by gravity forces with the Planets, in groups orbiting the Planet's orbit. They may be divided on carbon (about 75%, include dark carbon compounds), metal (about 8%) and silicate (about 17%). Asteroid and Comet as small celestial body Comet is...