Which of the following phenomena are not thought to be results of collisions or other interactions between galaxies?
A)the fact that elliptical galaxies are more common in clusters of galaxies than outside clusters
B)starbursts
C)the fact that spiral galaxies have both disk and halo components
D)the presence of very large, central dominant galaxies in clusters of galaxies

Question

Quizplus · Accepted Answer

The fact that spiral galaxies have both disk and halo components is a fundamental characteristic of their structure, not directly a result of collisions or interactions with other galaxies. These components are thought to form through the process of galaxy formation and evolution, rather than through galactic interactions.

Which of the Following Phenomena Are Not Thought to Be