The "galactic plane", for the purposes of this nonsense, is the centre line of the Milky Way. The sun passes through this plane twice a year, coincidentally at roughly the time of the winter and summer solstices. At the winter solstice, it happens to pass close to the position in the sky occupied by the galactic centre. This has been going on for many years, and will continue to happen for many years.

The idiots responsible for the 2012 story make two claims that are demonstrably false:
1) The closest alignment will happen in 2012 (it actually happened several years ago).
2) The close alignment will induce gravitational disruption on the Earth (it didn't and doesn't, because the gravity of the galaxy is a tiny and continuously present force).

Grant Hutchison