A theory was mooted that our sun came from 10000 ly closer coreward than it is now. I wasn't aware of the theory - and it seems not all those aware really thought much of it, because it ran against some dynamical constraints. Maybe not though.
The notion is, so I take it, that our rarified arm of the Milky Way doesn't cook up many highish-metallicity G stars on-up, on its own. Alpha-Centauri aside, mostly around here we got K and M. But there survive "twins", other 4.6Gy stars of more-or-less the same composition headed in the same general orbit. They only go as far a F of course because anything hotter would have red-gianted by now, like Sirius B.
The range chosen was 1000 ly / 300 pc, a reasonable-enough allowance for drift over five billion years. Usually mooted around here are HD 162826 (110 ly, Herculi) and more-so HD 186302 (184, Pavo). They found 6594 "twins" in toto.
Daisuke Taniguchi's team recently calculates the effect to which the central bar of this galaxy might lever smaller stars (than the bar) onto higher orbits. Close to home this might also have affected the higher planetary orbits, from Jupiter to beyond.