Also the "Silver Ghosts" [1] in Stephen Baxter's Xeelee Sequence [2].

[1] https://xeelee.fandom.com/wiki/Silver_Ghosts

[2] Best read in the form of summaries and compilations of world-building backstory.

Since you mentioned that before me, I'm going to link:

https://en.wikipedia.org/wiki/Worlds_in_Collision

It may not be very good as science fiction, but it's an interesting historical/social phenomenon.

wow very cool thank you!