On Sunday, September 15, 2019 at 2:31:49 PM UTC-7, Herbert Glazier wrote:
On Saturday, September 14, 2019 at 8:18:03 AM UTC-7, wrote:
Andromeda is not going to collide with the Milky Way, but only merge.

Actual star collisions are in fact going to be extreemly rare, if any !

All should start to think of this upcoming event in the proper context.

Will they end up sharing two BHs? bert

Almost certainly, but it is probable that these will eventually coalesce into a single black hole...

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

Such mergers have already been detected...

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