The polarization of light is the key to obtaining a wealth of essential information that lies encoded in the electromagnetic radiation from cosmic objects. Spectropolarimetry and imaging polarimetry provide powerful diagnostics of the physical conditions in astrophysical plasmas, which cannot be obtained via conventional spectroscopy. Whilst its

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PASS, the Permanent All Sky Survey is a project to survey the entire visible sky for the presence of transits by extrasolar planets. The instrument would consist of one or two fixed arrays of wide-angle cameras, that would permanently take images of the entire visible sky more then 30 deg above horizon. A design sutdy consisting of 15 cameras in

As an example to the potential of on-going AGN surveys we show how to select a set of radio sources with a structure-related objective: e.g. to study the size and properties of the narrow-line emission region (NLR) in AGN. A straight radio jet blasting through the NLR/ISM border suffers shocks that are seen as prominent radio features. From a

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In this work we propose a preliminary seismic investigation of $delta$ Scuti stars in the Pleiades cluster, focusing on potential diagnostics of convection and core-overshooting. Taking into account the effect of fast rotation in the modelling, we compare observed frequencies for 4 $delta$ Scuti stars with radial linear instability predictions. A