Problem
a) Based upon what you have learned about different types of galaxies, which of the types of galaxies is most likely to be oldest?
b) Which of the types of galaxies would you most likely find at the center of a large cluster of galaxies?
c) Which of the galaxy types would be least likely to contain an ionization nebula like the Orion Nebula?
d) Besides the shape, what are some other distinguishing characteristics of elliptical galaxies?
e) Besides the shape, what are some other distinguishing characteristics of spiral galaxies?