As we look deeper and deeper into space (and thus farther and farther back in time),the composition of rich clusters of galaxies
A) is about the same mix of ellipticals and spirals that we find in the Virgo cluster and other nearby rich clusters.
B) increases in the ratio of ellipticals to spirals.
C) increases in the ratio of spirals to ellipticals.
D) contains increasing numbers of large irregular galaxies,replacing spirals and ellipticals altogether.

Question

Quizplus · Accepted Answer

As we observe galaxies farther back in time, we see an increase in the ratio of spirals to ellipticals. This is because the universe was younger and galaxies were in earlier stages of their evolution, where spiral galaxies were more common before many of them merged and transformed into elliptical galaxies.

As We Look Deeper and Deeper into Space (And Thus