Recent advances in observations and modelling have opened new perspectives for the understanding of fundamental dynamical processes cosmic magnetism, and associated magnetic activity on the Sun, stars and galaxies. It is very timely and important for the progress in solar physics and astrophysics to discuss similarities and differences in phenomenology and physics of magnetic phenomena on the Sun, magnetic stars, galaxies and intergalactic medium. The Solar Dynamics Observatory, Kepler mission, other space observatories, new large ground-based telescopes and new observational methods provide tremendous amount of data that need to be analyzed and understood. The solar observations discovered multi-scale organization of solar activity, and helioseismology provided a detailed view of the solar interior structure and dynamics, dramatically changing interpretations of solar variability. On the other side, stellar observations discovered new regimes of dynamics and magnetism (such as diminishing differential rotation, polar spots, prominent active longitudes and “flip-flops”) that are quite different from the corresponding solar phenomena, but are described by the same physics. Stars provide an astrophysical laboratory for studying the dynamical, magnetic and radiation processes across a broad range of stellar masses and ages, and allow us to look at the origin and evolution of our Sun, where as detailed investigations of the Sun give us a fundamental basis for interpretation and are vital for understanding of unresolved stellar data. In addition, magnetic fields represent a major agent in the interstellar medium and galaxies, and are believed to play a significant role in their structure and dynamics, as well as in the processes of star formation.

This Symposium will be a forum for discussing the recent advances in observations and modelling of cosmic magnetic fields, analysis of new data from ground-based observatories and space missions. The primary focus of the Symposium will be on comparative studies, on understanding the similarities and differences of cosmic magnetism of various scales.

The venue of this Symposium is motivated by the location of the Crimean Astrophysical Observatory, which made substantial contributions to solar, stellar, galactic and extra-galactic astronomy and continues to provide important data for studying short- and long-term variability. This is one of the largest astronomical observatories with a broad range of telescopes, covering the whole spectrum from radio to gamma rays. The last International Symposium “The Problems of the Magnetic Fields in the Cosmos” was held in the Crimean Observatory in 1976.

The Symposium will mark 100th birthday of Professor Andrej Severny - one of the pioneers of cosmic magnetism studies and observations of magnetic fields from the ground and space. It is important that the Symposium will be held in Ukraine, where a significant effort is being made for integrating the astronomical research into the international community. This Symposium will encourage participation of astronomers from other FSU countries and allow them to interact with the world-wide astronomical community and establish cooperations.

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