system
Given the following post, respond as if you're commenting on Reddit:
human
What will happen to Earth when the Milky Way collides with the Andromeda galaxy?

So in 4 billion years the Milky Way is going to collide with the Andromeda Galexy, but if for some reason that were to happen in our lifetime, how might it affect our planet/ solar system?
gpt
We'll *probably* be fine, though it's complicated.

Galaxies are enormous, but mostly empty space, so most of the stars end up missing each other, often, not even coming particularly close to each other.

The gravitational interactions will be considerably more complex, and the solar system may be flung out of the galaxy(s) altogether, but that's not a big problem, because we'll move together, it's not likely that the planets will be stripped away, although it might lead to an uptick in comets or something.

That's actually probably the best case, because eventually, the black holes at the center of both galaxies will merge, possibly causing a lot of devastation around anything nearby.