Most of the questions in this chapter deal with sources that do not show the "classical" broad emission-line spectrum that characterizes the majority of known AGNs at high and low redshift. If that majority represents a "parent population" of AGNs, is the apparent absence of broad lines a result of obscuration, orientation, or different physical

After almost one century since their definition, the origin of lenticular galaxies is still a matter of debate. Several formation processes have been proposed in order to explain the wide variety of their observational properties. These properties could indicate that the class of lenticulars is a family formed by galaxies with different formations

At present, the Kepler mission has identified 1235 candidate stars to harbor extrasolar planets. In this contribution we compare the properties of approximately 350 of these stars with those associated with planets detected by the Doppler technique. The metallicities are analyzed, among other intrinsic features, as well as the average distance to

The radical cation of the fullerene series C-60, C-70, C-76, C-78 and C-84 were generated in oleum (fuming sulphuric acid with 30% free SO3) and analyzed by electronic absorption spectroscopy. A general agreement was found between the fullerenes radical cation spectra generated in oleum and those described in the literature and produced in other

The observational status of the polarisation of the anomalous microwave emission (AME) is reviewed, both for individual compact Galactic regions as well as for the large-scale Galactic emission. There are six Galactic regions with existing polarisation constraints in the relevant range of 10?40?GHz: four dust clouds (Perseus, ? Ophiuchi, LDN1622

In the last years, photometric and spectroscopic evidence has demonstrated that many, maybe all the Globular Clusters (GC) host multiple stellar populations. High-resolution spectroscopy has established that, while most GCs are mono-metallic with no significant abundance spread in s-elements, in all the globulars studied to date the presence of