Most asteroids orbit around stars and move faster than them.
The sun's gravity doesn't necessarily cause the asteroids to move, however it does cause the asteroids to move the way that they do move. For example, let's take away the sun. Any asteroids around the sun would continue to move at the same rate that is was moving prior to the sun being taken away. However, instead of following an elliptical orbit around the sun, the asteroid would move in a straight line instead. So the asteroids can still move without the sun. However, it is the sun that makes the asteroids orbit around the sun. The orbit's tendency to want to move away in a straight line counteracts the gravity created by the sun. The results of these two forces is what causes the asteroids elliptical orbit.
Asteroids
the gravity stops them from floating away
Yes, they orbit the sun, a nice balance of centrifugal force and gravity. If they did not move, relative to the sun, the sun's gravity would pull the asteroids into
asteroids are small chunks of rock which move in the asteroid belt between Mars and Jupiter while dwarf planets like Pluto have a centrifugal force and orbit the sun.
Comets are Comets and Asteroids are Asteroids
If they crash into Earth, an enormous amount of energy can be released, since they move very fast.
Asteroids
the asteroids crashed in Asia have 1000 asteroids
No asteroids have atmospheres.
No. Asteroids are just made of rock and metal. They do not glow.