How does the solar nebula theory help us understand the location of asteroids?
The solar nebula theory tells us where the densest planets will be and where the lower density planets will be in the solar system. There will be a region where planets cannot form properly and where gas giants will not form. Also it takes into account the gravitational disturbances from other planets that might rip apart any planet that may form. Thus we get the asteroid belt. We also see the Kuiper Belt beyond the solar system where asteroids are. There are also Lagrange points where asteroids are stable in planetary orbits. This is incorporated in the Solar nebula theory.
