Andromeda's sphere of influence is much larger than anyone thought

NASA scientists have detected a massive halo of plasma surrounding the nearby Andromeda galaxy. The halo, a massive orb of influence stretching deep into space, reaches halfway to our own Milky Way galaxy. Eventually, Andromeda and the Milky Way are expected to merge into one galaxy. We hear a lot about the Milky Way and that makes sense since it's the galaxy we happen to live in, but not far away is another galaxy that is just as interesting as our own. It's the Andromeda galaxy, and despite be...