When two galaxies collide, what happens to their stars?
A) About 30% of them collide and become black holes.
B) About 50% of them become binary stars.
C) The evolution of all the stars in the larger galaxy is accelerated.
D) Nothing happens to them, except that their orbits may change.

Question

Quizplus · Accepted Answer

When galaxies collide, the vast distances between stars mean that direct collisions between stars are extremely rare. Instead, gravitational interactions can alter the orbits of stars within the galaxies.

When Two Galaxies Collide, What Happens to Their Stars