I've been thinking about this some more. The "Modern Whatever" title is a cop out in a lot of ways -- it avoids the nasty business of trying to think of a title that is actually meaningful. For example, you could say "Astrometric Techniques of the Late 1990's" -- that's another way of saying "Modern Astrometry" but it is also a bad title. We don't care about when we care about how or what. A better title (for this ficticious example) would be "Computational Techniques of Astrometry using 2-D Spline Fitting" or "A Review of Astrometric Techniques for the HST". Or how about "Automating Astrometric Solutions with the UCAC2 Catalog".

None of these titles are as tidy as "Modern Astrometry" but on the other hand they won't be wrong in 24 months.