What is the galaxy content of rich, irregular clusters of galaxies such as the Hercules cluster?
A) about the same number of spirals as ellipticals
B) entirely spirals
C) more than one-half spirals, less than one-quarter ellipticals
D) more than one-half ellipticals, less than one-quarter spirals

Question

Quizplus · Accepted Answer

Rich, irregular clusters of galaxies, like the Hercules cluster, tend to have a composition where spirals outnumber ellipticals, with more than one-half of the galaxies being spirals and less than one-quarter being ellipticals. This reflects the less densely packed and more dynamically young nature of these clusters compared to their rich, regular counterparts, which are more dominated by elliptical galaxies.

What Is the Galaxy Content of Rich, Irregular Clusters of Galaxies