Recognising baut informative replies, I have not been able to find a good diagram showing the events of 2012.

It seems to me there are three intersecting vectors: the ecliptic, the solstice hemisphere line orthogonal to the celestial equator, and the stars themselves represented by the position of the centre of the galaxy.

I would be interested to know

1. Is this geometry accurate?
2. If so, is a diagram available showing the path from the present position of the galactic centre to its meeting with the ecliptic and the celestial hemisphere line at the solstice point?
3. Is the date 21 December 2012 when the galaxy moves relative to earth into a different hemisphere?

Thank you.

Robert Tulip