Galactic and extragalactic.
Neutron stars, pulsars, black holes on all scales, microquasars.
Structure, multiwavelength radiation, gravitational waves, neutrinos, progenitors, host galaxies, GRB-star formation connection.
Philosophy of space time theories, interpretation of quantum mechanics, ontology
Central objects, radio, X-rays, interaction.
General Relativity, alternative theories of gravity, cosmological black holes, local effects of the cosmological expansion.
Blazars, Radiogalaxies, Variability
Supernova remnants, compact objects in X-ray binaries and massive stars with the new generation of X-ray satellites: XMM-Newton, Chandra and NuStar.