Ok here is what I am wondering, gee I wish I had more than one year of pre-professional physics. I was considering the phenomenon of planetary alignment that will occur on or about 12/21/2012. As I understand it, all the planets in our solar system will become aligned in an almost straight line, also on or about this same date, the earth will passing through a the plane of the Milky Way as it oscillates toward the other side of the plane. (If I am wrong about this please feel free to correct me.) I am wondering if and when these phenomenon occur will there be a cumulative increase/decrease in gravitational force on the earth and planets? I understand equal and opposite forces interacting with each other, but could/would say the gravitational force of Jupiter, Saturn and the other planets further from the sun add their gravitational pull on the earth, mars, and venus and possibly alter the orbit or rotation of the earth? Is this possibly why, as we approach 2012, we seem to be experiencing an increase in the numbers of earthquakes? Or does it just seem to me that we are getting increased geological/seismic activity due to the speed at which we can report seismic activity around the world?