Recent observational results from space- and ground-based telescopes have demonstrated that a unified approach to the relationships between solar and stellar magnetism is necessary to advance our understanding of magnetic fields. The Proceedings of IAU Symposium 354 present recent results and discussions of emerging topics, including: magnetic field diagnostics using high-resolution observation; initial data from ALMA, Chinese Radio Spectroheliograph and other instruments; the detection of stellar magnetospheres; and the detailed mapping of magnetic fields on the surface of stars using new unique instrumentation. These observations stimulate comparisons of solar and stellar results, and improve our understanding of how surface magnetic structures and their evolution are related to the generation of magnetic fields by dynamos in solar and stellar interiors. This volume benefits graduate students and researchers interested in the recent advances and key problems of solar and stellar magnetic fields, and their impacts on planetary atmospheres.

All phases of stellar evolution are influenced by the presence of magnetic fields in the star's interior and close environment. IAU Symposium 302 gives an overview of the emerging field of stellar magnetism. The last few years have seen the dawn of a new era in this research domain, with the advent of powerful tools strengthening both observational and modelling approaches, rapidly changing our view of the role stellar magnetism plays throughout stellar evolution. The topics covered span all phases of evolution, from the formation of stars and their early accreting years, through main sequence evolution for both low and high mass stars, and also the final stages of stellar evolution. This volume features the most recent advances achieved by major observatories (ground-based and space-borne) and through massively-parallel 3D numerical simulations, benefiting astronomers interested in the latest observational and theoretical developments in this exciting and growing field.