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Litalian t1_jdrt89f wrote

Distances between stars in a galaxy are so great that it will be near impossible for most stars or planets to collide. Though a few are likely to. We would almost surely still have our Sol And solar system as it has always been, just probably much farther from the center of our new galaxy than we were in our old. And this would apply to almost the entire galaxy. It would not be nearly as destructive as you probably imagine.

Edit to say that the most destructive part of the collision would likely be the force of gravity launching some entire stars, planets, and solar systems out of orbit entirely. Off into the darkness of space to freeze and float forever. This is also an unlikely scenario for 99% of both galaxies, but it’s still going to happen to some of them.

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Antimutt t1_jdru3u8 wrote

The Milky Way ends in a cosmic butter-churn that is an elliptical galaxy.

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mindful_madman t1_jdrw27x wrote

Things will get moved around and objects will be exchanged, but there will probably still be two galaxies at the end.

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lezboyd t1_jds2env wrote

Replying to Litalian (#2,374,367)

Pretty much this. I think there are gifs and videos of this being simulated too.

What I would like to add is that the merger and gravitational interaction of the matter within both galaxies will also result in a new burst of active star formation as the gases and nebulas within both galaxies are acted upon by various forces during the merger.

As for our Sun, it would be in its late stages, either nearing it or having already become a red giant and swallowing up the inner planets. So unless we have become a space faring species and spread out to other stars, we'd more likely be extinct.

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Due_Connection179 t1_jds3hbp wrote

Replying to Litalian (#2,374,367)

This, but it also depends on how close Andromeda's black hole (or larger stars) comes to us because it could push us around in our solar system, or launch us into deep space altogether (both extremely unlikely obviously).

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No_Albatross_8475 t1_jdsaazg wrote

Well both galaxys will exchange insurance details and let them sort it out.

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simcoder t1_jdsb5le wrote

A lot of dust will get stirred up and bunch of new stars will probably form.

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NoFact8018 t1_jdsidy4 wrote

Does it really matter? Does anyone actually believe that the human race is going to survive long enough to see it?

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rkhbusa t1_jdt6b46 wrote

Replying to Litalian (#2,374,367)

Not even a few there’s a less than 1% chance that a star collision will occur when the two galaxies collide. If the distance between the stars was measured in kilometres the stars would be grains of sand.

Additionally while the stars exhibit gravity that often doesn’t put them on collision courses. Play some kerbal space program and learn how hard it is to hit a large gravitational object without just slingshotting around it.

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ej_mcmxc t1_jdtcvak wrote

The trout population will probably be negatively affected unfortunately

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DolphinWings25 t1_jdtg10v wrote

I feel like I just watched some super computer video of exactly what will happen?

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X_PRSN t1_jduaf6a wrote

No one's asking the real question: What will we call our new galaxy?

Milkdromeda? Androway?

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Postnificent t1_jdw70v0 wrote

Since we are moving apart rather than together it will never happen…

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