I am Professor of Astrophysics (Chair) at Göteborg University and Chalmers University of Technology. In 1974 I earned my Ph.D. in theoretical physics from Warsaw University. After that I worked for several years at Stanford University and University of Texas at Austin. Later, for more than a decade, I collaborated closely with Dennis Sciama, first at Oxford University and then at the International School for Advanced Studies in Trieste. For twenty years I was a member of the Academic Board at the Salam's International Centre of Theoretical Physics in Trieste. In 1990-1994 I was professor of astrophysics at Nordita, the Nordic Institute for Theoretical Physics in Copenhagen. My interests include accretion discs theory, active galactic nuclei, neutron stars, black holes, nature of inertial forces and quantum effects in strong gravity. I supervised more than ten doctorates, and published more than 150 research articles.