https://en.wikipedia.org/wiki/Galactic_Center#:~:text=The%20Galactic%20Center%20is%20approximately,south%20to%20the%20Pipe%20Nebula.
ok, kinda spooky
the galactic centre is 26000 light years away
so if it rotates every 26000 years then it would rain a 360 degree magnetic field rotation cycle on us every 26000 years, which seems to be the case
that's approximately 6500 years per 90' rotation, 13000 per flip
so the Yuga cycle is literally a galactic year, that takes a galactic year to hit us