chapter 1 Accretion discs -- chapter 2 Discs with MHD turbulence and their response to orbiting planets -- chapter 3 Mixing at the surface of white dwarf stars -- chapter 4 Pulsar magnetospheres -- chapter 5 Magnetic fields in galaxies -- chapter 6 Self-consistent mean field electrodynamics in two and three dimensions -- chapter 7 The solar tachocline: Formation, stability and its role in the solar dynamo -- chapter 8 Magnetoconvection -- chapter 9 Alfve´n waves within the Earth’s core -- chapter 10 Turbulence models and plane layer dynamos -- chapter 11 Planetary and stellar dynamos: challenges for next generation models -- chapter 12 Convection in rotating spherical fluid shells and its dynamo states -- chapter 13 Laboratory experiments on liquid metal dynamos and liquid metal MHD turbulence.