@Teresa_Sturgess Here is some small proof I received today that made me laugh. When I was a kid the yellow pages were about 4 times as thick as they are today.
Galaxy collisions are the ultimate in slow-motion stunts. ⏱️
When a pair of galaxies encounters each other, it takes 1-2 billion years for them to merge and settle down. The stars already in the galaxies don’t change much, but the collision can spark lots of new stars to form! ✨