A ring-like filament of stars wrapping around the Milky Way may actually belong to the galaxy itself, rippling above and below the relatively flat galactic plane. If so, that would expand the size of the known galaxy by 50 percent and raise intriguing questions like, Will FD include these extra billion stars in the future. http://news.discovery.com/space/galaxies/the-milky-way-may-be-50-percent-bigger-than-thought-150310.htm