The aim of this book was to inform you, the interested reader, as comprehensively as possible about the present understanding of the magnetic solar system. In doing so, the magnetic fields of the Sun and many planets have been reported, dynamos which generate them, the tremendous magnetic eruptions and storms on the Sun, the properties and influence of the dynamic solar wind in the heliosphere, its interaction with obstacles such as magnetospheres, and the complex phenomena of space weather and its possible influence on the Earth’s climate. Through use of many pictures and schematic drawings, great clarity for the reader was aimed at. In addition, it was also an important goal to show the general importance of the effect of magnetic processes in the highly ionized plasmas and metallic fluids in extrasolar systems and to explain them as comprehensibly as possible.