It isn't quite clear what you mean with "come".Asteroids normally orbit the Sun - just as the planets.
Asteroids MAY come from other solar systems; so far we know of ONE such case, but it is likely that there are more.
10,000
they are just called astroids.
Astroids have not been "created". Astroids are the remains of dead planets and stars that travel through space at speeds of up to 1 million kilometers an hour. Astroids have been around since planets and stars were created.
astroids and atomic rocks
Astroids are huge rocks but all the astroids don't look the same.
in canada
yes they are.
i do not know... Peace out
Saturn.
Metorites and astroids.
No, none of the planets have asteroids.
holes that astroids hit