the rotation of the planet, combined with our orbit around the Sun, combined with the Solar System's orbit in the Milky Way
It's obvious too, that it will all add up to...2012 - right?
Seriously tho', it is only spin, or rotation, that keeps us all from being at the bottom of a gravity well somewhere, be it solar, galactic, or whatever.
13 posted on 04/13/2010 8:33:39 AM PDT by Huebolt
(Some people are born to be slaves. They register as democrats.)