The Sun's journey through the Milky Way galaxy has taken it through different stellar neighborhoods and past other stars. It's possible that during these interactions, the Sun could have encountered gravitational perturbations that might have caused other planets or systems to be disturbed. However, the dynamics and probability of such captures are complex, and much more detailed modeling and observational data would be needed to determine if this has happened.
One aspect to consider is that planets around other stars typically form within disks of gas and dust called protoplanetary disks. These disks are usually constrained by the gravitational pull of their host stars. For a planet to be dislodged from its original star and eventually be captured by the Sun, it would require a significant gravitational encounter, such as a close passage between stars or the influence of a passing third star.
Furthermore, the distances between stars in our galaxy are vast. While stars can occasionally approach each other, it's rare for stars to come close enough for gravitational interactions that might lead to the capture of planets.
As of now, the existence of captured alien worlds remains speculative, and more research is needed to investigate the probability and observational evidence for such events.
