This picture is of two galaxies colliding.
In billions of years, they will form only one galaxy. The smaller glaxy on the right will become engulfed in the bigger galaxy on the left. When I look at this picture, it is hard to comphehend because the points of light look so far from each other that it seems like it wouldn't have that type of force on the smaller galaxy. I wonder what these galaxies will look like over time.