Which of the following is likely to happen when two spiral galaxies collide?
A) A more massive elliptical galaxy might form out of the merger.
B) The two supermassive black holes at their centers could form a binary black hole system.
C) A burst of star formation will occur in the merged galaxy.
D) The cold gas in the merged galaxy might be blown away by supernovae.
E) All of these are likely.

Question

Quizplus · Accepted Answer

When two spiral galaxies collide, all of these events are likely: the formation of a more massive elliptical galaxy, the creation of a binary black hole system, a burst of star formation, and the potential for cold gas to be expelled by supernovae.

Which of the Following Is Likely to Happen When Two