Quote:
|
Originally Posted by Svemir
So, the initial protoplanetary disk was more massive on the outer side of Uranus/Neptun since they migrated outwords even the disk was less dense then inner disc from wich all inner planets were formed and despite majority of debris disk's mass (Jupiter/Saturn et al.) was located in the place between the Sun and U/N system? (Do I smell Dark Matter here? :-))
|
Not necessarily (and apparently not in the case of this paper). It's possible that Jupiter and Saturn could have given Uranus and Neptune energy in a resonant "kick" that would send them to a larger orbit. (Think Earth-moon system.)