• NewAthena Rising: SWG4, Barcelona (Spain), 2-5 June 2026 (Registrations close: 17/04/2026).
• The X-ray Universe 2026, Elche (Spain), 8-11 June 2026.
• Galactic Frontiers 2026: Advancing X-ray Astronomy in a Multiwavelength Universe, Bad Honnef (Germany), 15-18 June 2026.
• High Energy Astrophysics and Cosmology in the era of all-sky surveys, Yerevan (Armenia), 15-16 June 2026.
• Breaking the limits 2026: Super-Eddington accretion onto compact objects, Sardinia (Italy),  22-26 June 2026.   
• European Astronomical Society Annual Meeting, Lausanne (Switzerland), 29 June – 3 July 2026.
• Space Telescopes and Instrumentation 2026: Ultraviolet to Gamma Ray,  Copenhagen (Denmark), 5–10 July 2026.
• AGN Feedback across all scales and time, Garching (Germany), 6-10 July 2026.
• EXPANDING HORIZONS: WHAT ARE THE ASTRONOMICAL CHALLENGES OF THE 2040S, Garching (Germany), 13-17 July 2026.
• The UK National Astronomy Meeting: The Origin and Growth of Supermassive Black Holes, 20-24 July 2026.
• UK & Ireland Accretion Discs Meeting 2026, Cambridge College (UK), 20-22 July 2026.
• 6th COSPAR Scientific Assembly: E1.18: Revolutionising High-Energy Astrophysics with NewAthena, Florence (Italy), 1-8 August 2026.
• 2nd Philippine Space Science and Astronomy Research Conference (PSSARC), Talamban Campus, Cebú (Philippines), 3-5 August 2026.
• NEUTRON STARS AND NEBULAE: Habitats for Photons, Cosmic Rays, and Other Animals, South Africa, 9-14 August 2026. 
• Chandra's Dynamic Universe, Cambridge, MA (USA), 18-20 August 2026 (Contributed Talk Abstract Deadline: 26/04/2026).
• Tidal Disruption Events and Nuclear Transients in Crete vol. 2, Heraklion (Crete, Greece), 24-28 August 2026.
• New Results in X-ray Astronomy & NewAthena, Leicester (UK), 2-3 September 2026. Registration is now open. Deadline for abstract submission: 24th July
• The many tones of accretion – to the memory of Tomaso Belloni, Cefalù (Sicily, Italy), 7-11 September 2026 (Abstract deadline: end May).
• Illuminating the Active Universe: Multi-Wavelength and Multi-Messenger Insights into AGN, ESO Garching (Germany), 14-17 September (Abstract deadline: 15/04/2026).
• HERA 2026 – Black Holes at Different Flavours, Warsaw (Poland), 21-25 September 2026 (Registration is open until 30 May).
• AGN on the Beach II: A multi-scale view of jetted AGN, Diani (Kenya), 21-25 September 2026. 
• International Astronautical Congress (IAC) 2026, Antalya (Turkey), 5-9 October 2026. Registration deadline 10 July.
• Many faces of stellar-mass black holes, Kathmandu (Nepal), 12-16 October (Abstract deadline: 05/06/2026).
• 5th Astro-COLIBRI Multi-Messenger Astrophysics Workshop, Institut Pascal, Paris-Saclay (France), 12-16 October 2026.
• Many faces of stellar-mass black holes, Kathmandu (Nepal), 12-16 October 2026.
• YAGN26 - Young Astronomers on Galactic Nuclei, Sevilla (Spain), 26-28 October 2026.
• A NICER Legacy: Neutron Stars, Black Holes, and Time-Domain Astronomy, Maryland (USA), 2-4 November 2026.
• Galaxy Nuclei – Diversity, Dynamics, and Hidden Mass in Galactic Centers, Santiago de Chile (Chile), 16-20 November 2026.
• LARIM 2026, XVIII Latin American Regional IAU Meeting, Cancun (Mexico), 30 November - 4 December 2026. Registration deadline 31 August.

• NewAthena SCIENCE CONFERENCE , Prague (Czech Republic), 19-23 April 2027. 

Notice that this list is not meant to be all-inclusive. Updates, corrections, or meeting suggestions should be sent to the ACO.