Astrophysicists have detected a massive cluster of galaxies millions of light-years wide is hurtling through space at velocities so high that modern physics can't explain their motion. The galaxies are all part of the Local Group, a ring of galaxies which contain the Milky Way and Andromeda galaxies at the center. Andromeda, our closest neighbor, is predicted to collide with our own galaxy in 3.75 billion years; however, new research from the University of St. Andrews suggests that the Milky Way and Andromeda might have once already collided or at least passed dangerously close by one another, an event that sent ripples throughout the galactic neighborhood which are still being observed today. This theory is based on the distribution and velocity of the galaxies in the Local Group. According to lead researcher Indranil Banik, the outwardly spiraling motion and speed of these galaxies likely could have only been set in motion if some unknown and extremely powerful phenomenon occurred