they form by using my right leg to shake so much that science does not matter anymore and also my leg still aches.
Between Mars and Jupiter is an asteroid belt.
Asteroids are too small to have enough gravity to prevent any atmosphere form escaping.
Scientists believe that asteroids will never form into planets because the gravitational forces are not strong enough to bring them together to form a rounded shape like planets have. Additionally, asteroids' orbits often intersect with other celestial bodies, which prevents them from accumulating mass to form a planet.
The asteroids.
By asteroids impacting the surface.
Because they do not have volatiles in them to form a coma as to comets.
One theory is that the gravitational influence of Jupiter prevented the asteroids in the asteroid belt from merging to form a planet. Jupiter's strong gravitational pull disrupted the formation process by stirring up the asteroids' orbits, making it difficult for them to coalesce into a larger body. Additionally, the asteroids in the asteroid belt may have had too much relative velocity to effectively merge.
Although many asteroids accreted through gravity and tidal interactions, their "moons" would simply be smaller asteroids or meteoroids that were caught in the gravitational pull. Unless they approach directly and collide, they can form orbits around the larger body until perturbed by some other body.
jupeters gravity disrupted their formation
They are formed by asteroids and meteorites crashing into the surface of the moon
any asteroids that collide with the planet containing ice deposit it on the surface
Comets are Comets and Asteroids are Asteroids