Milky Way Galaxy Doomed: Collision with Andromeda Pending . ... Credit Copyright: NASA , ESA , Z. Levay and R. van der Marel ( STScI ), and A. Mellinger Explanation: Will our Milky Way Galaxy collide one day with its larger neighbor, the Andromeda Galaxy? ... Still, the errors in sideways velocity appear sufficiently large to admit a good chance that the central parts of the two galaxies will miss, slightly, but will become close enough for their outer halos to become gravitationally entangled . ...