Comets, meteors, and asteroids, also known as space travelers, are another

part of our solar system. Asteroids are made of large pieces of rock, or rock and

metal. There are many asteroids through out our solar system. Although there

are many asteroids they are all grouped into three main groups, cartonaceous,

silicaceous, and metallic asteroids. Each group of  asteroids are completely

different. Comets and meteors are very small compared to the rest of our solar

system. Comets are chunks of ice mixed with dust and grit. Comets spend most

of their time away from the sun. Meteoroids are far smaller than comets.

Meteoroids may be dust, chunks of rock from comets or even fragments of

shattered asteroids. Meteoroids are also known as shooting stars.