Space Is So Empty That If Two Galaxies “collide”, Very Little Would Be Destroyed"

You may have heard that at some point in the future, our galaxy will collide with our nearest neighbor, the Andromeda galaxy. This may conjure images of exploding stars and planetary crashes on a massive scale, but the reality is much more tame. Despite the fact that galaxies are filled with stuff, space is huge. It’s really unbelievably spread out, and that means that there are millions of miles between everything. When the collision happens, it’s very unlikely that objects from one galaxy will strike objects from the other. Instead, they’ll simply meld together into one glorious new galaxy."https://www.highpointscientific.com/astronomy-hub/post/astronomy-101/10-astronomy-facts-every-stargazer-should-know