:unsure: The probabilaty of Matter being captured by our sun as it woffled past our solar system is highly speculative. Not imposable, but not the most likly scenario. The only part of your theory that I find exeptable is the likly hood of gasiouse matter being in a compresion as a resolt of galactic colision. The chances of stellar colision is unlikly. This compresion may be the triger for new star formation.
So Jupiter Satern Uranus. the gas giants are where they should be., and are part of the solar system they were born in.
If a strong gravatational force was to disterb this solar system. None of the planats would have the near sercular orbits they do. They would I assume be in very eliptical paths or gone.
I am not part of that group of english scientests that you are concerned about. I sagest you forget that idea. its nonsence. I wish no ill on Mr Hawking, the man is a God., but hes not a well chap. We are fortunate he has completed so much work of such importantance to the scientific community, astronomy.
The langage you have used makes it difacult to understand what you are actually saying. Your efforts are interesting. English is not my best subject. We have this in common. I will look forward to your next letter.