Introduction Conditions in cosmic plasma, role of the magnetic field Charged particles in the electro-magnetic field Motion of particles in weakly inhomogeneous fields Adiabatic invariants Drift approximation Hydrodynamics Equations of perfect hydrodynamics Equations of imperfect hydrodynamics Sound Accretion Hydrodynamic accretion onto compact objects in absentia magnetic field Disk accretion and accretion onto magnetized star Notion of alpha-disk Alfven radius Single-liquid magnetic hydrodynamics Main equations Implementation conditions Freezing-in Magnetic Reynolds number Magnetic hydrodynamics of plasma Two-liquid hydrodynamics as a consequence of kinetic equations Qualitative analysis of transport factors Single-liquid limit Generalized Ohm's law Magnetohydrodynamic waves Alfven and magnetoacoustic waves Phase and group polars Damping of MHD waves Simple waves Shock waves Tangent and rotational ruptures Conditions on ruptures Shock waves Evolutionary condition Stationary solutions One-dimensional configurations (current layer, q- and z-pinches) Two-dimensional configurations Grad-Shafranov equation Forceless approach Generalization on relativistic motion case Neutron star magnetosphere Black hole magnetosphere Turbulent dynamo Kauling theorem Alpha-Omega-dynamo   LITERATURE: L.D. Landau, E.M. Lifshitz. Hydrodynamics (Vol. 6) L.D. Landau, E.M. Lifshitz. Electrodynamics of the continuum (Vol. 8) B.B. Kadomtsev. Collective phenomena in plasmas Questions of plasma theory. vol.1. Edited by M.A. Leontovich B.V. Somov. Cosmic electrodynamics and solar physics S. Shapiro, S. Teukolsky. Black holes, white dwarves and neutron stars