London: For decades, astronomers have pictured our galaxy as sporting four major, spiral arms, however new images effectively sever two appendages, revealing the Milky Way has just two major arms. An astronomer is calling for demoting two entire arms of our galaxy, after they failed to turn up in a sensitive new map of the Milky Way's stars. According to a report in New Scientist, the astronomer in question is Robert Benjamin of the University of Wisconsin in Whitewater, US.