Published online by Cambridge University Press: 25 May 2016
We are far from being able to populate a histogram of star formation versus time for an elliptical galaxy based solely on observations of its spectrum, but the path toward such a dream is becoming more clear. Still, we are denied the easiest paths, and most of what I have been thinking about in the last six months are the obstacles rather than the opportunities in age determinations for old stellar populations, and Es in particular. The following list should illustrate what I mean.