konferenzen HEAD 22, October 12-16 2025, St. Louis 4. Juli 2025 / HEAD 22, October 12-16 2025, St. Louis The 22nd meeting of the AAS High Energy Astrophysics Division (HEAD) will be held 12-16 October 2025 at the Hilton St. Louis at the Ballpark in St. Louis, Missouri. Meeting Website