I was taught that it was highly impossible. The real problem is gas hitting and forming new stars where you don't want them.
If it 'did' happen, it would be an event where we could detect the gravity waves from the other side of the universe. In saying that, there is evidence of Thorne-Zytkow objects: stars sitting inside of stars. That may be your answer.
P3t3rPanC0mpl3x t1_j1jvybp wrote
Reply to What happens when galaxies are passing by each other, and 2 stars smack into one another? by Kitkatphoto
I was taught that it was highly impossible. The real problem is gas hitting and forming new stars where you don't want them.
If it 'did' happen, it would be an event where we could detect the gravity waves from the other side of the universe. In saying that, there is evidence of Thorne-Zytkow objects: stars sitting inside of stars. That may be your answer.