If you don’t know the American Museum of Natural History, now is a good tile to be acquainted. Among the various research groups, the astrophysics, led by Dr. Tyson, is very active and has a nice visualization section.
Recently, it has been announced that our galaxy and the Andromeda galaxy are on a collision course. While this is the correct technical term, the result will mostly be that the 2 galaxies will go through each other a few times before merging and creating an even bigger galaxy. That is in about 3 billion years.
The AMNH has created a nice visual on this: Colliding Galaxies. Enjoy!