A multinational team of astronomers with the Sloan Digital Sky Survey-III (SDSS) has produced a new map of our home Milky Way Galaxy and determined that nearly 30 % of stars have dramatically changed their orbits. This image shows how stellar orbits in the Milky Way Galaxy can change. It shows two pairs of stars, marked as red and blue, in which each pair started in the same orbit, and then one star in the pair changed orbits. The star marked as red...