2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/115961Summary of Joint Discussion 13 of the 26th IAU General Assembly, Prague.To appear in Joint Discussion 13, IAU General Assembly XXVI in Prague, eds C. Bailer-Jones, C. Corbally, S. Giridhar, T. Lloyd Evans, Mem. S. A. It., 77Astrophysicstext