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We show the results of a mid and far IR study of ISO data of the CfA Seyfert sample. These data allow a detailed study of the far IR Spectral Energy Distribution (SED) of these galaxies. We find that the mid and far IR SED of Seyfert galaxies can be explained solely through thermal reradiation of high energy photons by dust, and, that this thermal

We present the current status of our knowledge on the photospheric abundances of massive blue stars (with spectral types O-A) in the Milky Way and Local Group galaxies, and the implications of these for stellar and galactic structure and evolution. We also consider possible extensions of this project to observe individual stars in galaxies beyond

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The authors have shown how two extensive stellar spectral libraries of very high quality obtained with telescopes of small size can help us in determining the main properties of the stellar populations of the galaxies (e.g., age; metallicity; IMF; element ratios). New libraries with larger spectral ranges and wider stellar atmospheric parameters

Integral field spectroscopy has been obtained for the nuclear regions of three large, well-studied, early-type galaxies. From these spectra we have obtained line-strength maps for about 20 absorption lines, mostly belonging to the Lick system. An extensive comparison with multilenslet spectroscopy shows that accurate kinematic maps can be obtained