Meteoroids

Meteoroids including the small size of celestial bodies with very large quantity.
A meteoroid around the sun in paths that are not fixed. can be attracted by meteoroids enter Earth's atmosphere because Earth's gravity. As a result there was friction with the air so that meteoroids into heat and fire, then changed to white incandescence.
If viewed from Earth, then it seems like a falling star.
Meteoroids are also known as shooting stars or meteors.

Every day more than 200 million meteors enter Earth's atmosphere.
Most are small, due to burn out before reaching the earth.
However, if the size is big enough, the meteor was probably not burn out when it comes to earth.
Meteor that fell to the ground was in its form of a very hot white lumps, then gradually became cool. Meteors are falling on the surface of the earth called Meteorite.