Scientists expected the minute grains retrieved from a comet Wild 2 to be made up mostly of interstellar dust ? tiny particles that flow through the solar system thought to be from ancient stars that exploded and died.
Instead, they found an unusual mix of primordial material as if the solar system had turned itself inside out. Hot particles from the inner solar system migrated out to the cold, outer fringes beyond Pluto where they intermingled and congealed to form a comet. … How material from the inner solar system could have ended up in comets is still a mystery. – msnbc
Who says the material is from OUR inner solar system? I think this shows that our solar system was created from a collision of two or more earlier solar systems.