Interstellar Medium (ISM) & Star Formation 5 GC - 1.4. Core collapse and GC 2026/04/03 GC - 1.3. Nuclear star clusters and GC 2026/04/01 GC - 1.2. Metallicity and GC 2026/03/07 GC - 1.1. Milky Way GC 2026/03/04 GC - 1. GC Characteristic 2026/02/27