The IAU Symposium 410 will bring together leading experts in solar and stellar coronal physics to bridge knowledge across traditionally separate research communities, continuing the legacy of IAU400. Building on rapid advances in high-resolution observations, numerical modelling, and machine-learning techniques, the symposium will focus on multi-wavelength impulsive events, such as flares and CMEs, fine plasma structuring, studies of coronal waves, and the mechanisms of coronal heating and solar/stellar wind. By fostering interdisciplinary exchange and strengthening solar – stellar connections, the meeting aims to open new pathways for understanding fundamental plasma processes operating in the Sun and cool stars, with implications for space weather and exoplanet habitability.