Actually our galaxy has had at least 1 other collision according to our current understanding.
https://www.wired.com/story/this-galactic-collision-shaped-the-history-of-the-milky-way/
But our spiral likely formed after.
Comment on Spiral galaxies like the Milky Way are surprisingly rare. Astronomers may finally know why.
homesweethomeMrL@lemmy.world 1 year ago
A computer simulation says spiral galaxies on a plane bang into each other and result in more elliptical galaxies. Ours hasn’t banged into anyone else yet, that the computer simulation knows about.
Kata1yst@kbin.social 1 year ago
bdx2023@lemmynsfw.com 1 year ago
… So that infamous impending collision with Andromeda will take our spirals away
(Impending in a cosmological sense, so several million years at least IIRC)
Trabic@lemm.ee [bot] 1 year ago
Thousands of millions of years I think, and continuing for at least hundreds of millions before the bouncing stops
media.giphy.com/media/…/giphy.gif