Living Reviews in Solar Physics is a peer-reviewed, platinum open-access journal, publishing reviews of research in all areas of solar and heliospheric physics. Living Reviews is unique in maintaining a suite of high-quality reviews, which are kept up-to-date by the authors. This is the meaning of the word "living" in the journal's title. Please, submit your original research articles to our sister journal Solar Physics. Living Reviews in Solar Physics was founded by the Max Planck Institute for Solar System Research (MPS) in 2004. Living Reviews® is a registered trademark of Springer International Publishing AG. Publishes invited reviews of research in all areas of solar and heliospheric physics Articles are regularly updated by the authors Founded by the Max Planck Institute for Solar System Research (MPS)