The restudy of cosmological processes led to a new view as to the relations of the erratic elements of the solar system, the meteors, meteorites, and comets, to the normal elements, the planets, planetoids, planetesimals, satellites, and satellitesimals, to the effect that they were all formed by the same type of dynamic action, save that the former were given erratic orbits, while the latter were given concurrent orbits.
Source: wiktionary