So you are saying some of the various material could not have migrated from other sources?Chris Peterson wrote: ↑Fri Apr 20, 2018 1:15 pm
Well, no. I think that "quite certain" remains the case. This new theory doesn't change that in the slightest. The material we observe comes from different sources and has different times of origin, and there's nothing to suggest, either theoretically or in terms of actual composition and physical characteristics, that it was ever all combined in a single planetary body.
What percentage of the material has been observed?