In the inner Solar System, the process is time-consuming, as tiny cosmic dust balls form slowly, stuck together only by random collisions in their orbits around the early Sun.
U unutrašnjem Sunčevom sistemu proces je dugotrajan, pošto se sićušne loptice kosmičke prašine formiraju sporo, povezujući se jedino slučajnim sudarima u njihovim orbitama oko ranog Sunca.