To understand the integrated spectra of normal, absorption-line galaxies, it is necessary first to be familiar with the absorption spectra of normal stars and how they are affected by common peculiarities, especially metallicity. The technique of NATURAL GROUPS is a powerful tool for unravelling the composite nature of the visible light of galaxies.
The course will be given in 8 hours during November, 1996. About half (4 hours) of the lectures will be concentrated on the spectra of stars The other half (4 hours) will apply the techniques to successively mosre complex composites: binaries, clusters and galaxies.