> An example, the collision of the Milky Way with Andromeda is likely to produce no collisions of solar systems. I was curious about this, so I found this sour

> An example, the collision of the Milky Way with Andromeda is likely to produce no collisions of solar systems. I was curious about this, so I found this source[0] via wikipedia: "Although the galaxies will plow into each other, stars inside each galaxy are so far apart that they will not collide with other stars during the encounter. However, the stars will be thrown into different orbits around the new galactic center. Simulations show that our solar system will probably be tossed much farther from the galactic core than it is today." Interpreted literally, it would seem this at least leaves open the idea that a star passing through any other star's solar system and, say, sending its planets into wildly different orbits or flinging some into interstellar space, is meaningfully more likely than a star actually physically hitting another star, but I haven't seen the math. I wouldn't be surprised if they're both extremely unlikely - the diameter of our solar system appears to be about 8500 times larger than the diameter of the sun, which may not change the odds in any significant way. [0] https://www.nasa.gov/mission_pages/hubble/science/milky-way-collide.html https://www.nasa.gov/mission_pages/hubble/science/milky-way-...