IAU Commission X1

Cluster5

07-11 September 2026

The Cluster5 conference will cover topics from cluster formation and evolution to observational and theoretical insights into the intracluster medium and active galactic nuclei. This meeting fosters collaboration across observational, computational, and theoretical approaches in modern astrophysics. It provides a platform for sharing new results, forging collaborations, and shaping future directions in cluster science.

COSPAR 2026

01-09 August 2026

The COSPAR Scientific Assembly is one of the world’s leading space research conferences, bringing together scientists from all disciplines to share the latest discoveries. The 46th edition will take place in Florence, Italy, in August 2026.

National Astronomy Meeting 2026

20-24 July 2026

The National Astronomy Meeting 2026 is one of the largest annual conferences in European astronomy, bringing together researchers from across the UK and beyond to present and discuss the latest developments in astrophysics, space science, and instrumentation. Hosted by the University of Birmingham, the meeting features plenary talks, parallel sessions, and community events, fostering collaboration across a broad range of scientific topics. See especially the High energy and transient phenomena session.

The many scales of galaxy environments

13-17 July 2026

Galaxies and their environments are deeply intertwined across cosmic scales — from molecular clouds to the cosmic web — shaping star formation, AGN activity and galaxy evolution. The The many scales of galaxy environments meeting aims to bring together observations and simulations across six orders of magnitude in scale to unravel how environment drives galactic evolution.

Deciphering the Growth of Supermassive Black Holes: Accretion, Mergers, and Cosmic Evolution

13-17 July 2026

Deciphering the Growth of Supermassive Black Holes: Accretion, Mergers, and Cosmic Evolution addresses the unresolved questions of supermassive black hole (SMBH) evolution, focusing on merger rates, growth during cosmic noon, and the complete accretion history. By combining observations, theory, and AI tools, it aims to connect SMBH growth with galaxy evolution and gravitational wave detections.

The Most Massive Galaxies and Their Environment Across Cosmic Time

06-10 July 2026

The Most Massive Galaxies and Their Environment Across Cosmic Time explores the formation and evolution of the Universe’s most massive galaxies, focusing on how environment, supermassive black holes, and physical processes shape their properties across cosmic history.

Supermassive Black Holes and Blue Notes

29 June-03 July 2026

Supermassive Black Holes and Blue Notes aims to spotlight the significant progress made in the study of supermassive black holes, addressing open questions and exploring future prospects, particularly in the wake of the latest observations from JWST. Key topics include precise measurements, event-horizon scale observations, feeding and feedback processes, and the formation and growth of high-redshift black holes.

High Energy Astrophysics and Cosmology in the era of all-sky surveys

15-19 June 2026

The High Energy Astrophysics and Cosmology in the Era of All-Sky Surveys conference brings together researchers to explore recent advances in high-energy astrophysics in the context of modern all-sky surveys and multi-messenger observations. The meeting focuses on compact objects, black hole growth, transient phenomena, and the interplay between observations across the electromagnetic spectrum, neutrinos, and gravitational waves, fostering discussion and collaboration within the international community.

Active Galactic Nuclei XVI: A Sea of Discoveries

15-19 June 2026

The Active Galactic Nuclei XVI: A Sea of Discoveries will bringing together leading experts to discuss the latest advances in AGN physics. With sessions ranging from accretion, jets and multi‑messenger observations to AGN–galaxy coevolution and supermassive black hole growth, the meeting aims to push forward our understanding of AGN and their role in galaxy formation and cosmology.

Galactic Frontiers 2026

15-18 June 2026

Galactic Frontiers 2026: Advancing X-ray Astronomy in a Multiwavelength Universe brings together experts and early-career researchers to explore the latest developments in Galactic high-energy astrophysics. The conference focuses on the physics of the hot interstellar medium, supernova remnants, and accreting compact objects — including neutron stars and black holes — highlighting results from current X-ray missions (eROSITA, XMM-Newton, Chandra, XRISM) and their synergy with multiwavelength and multi-messenger observations. It aims to foster discussion on the structure, energetics, and evolution of the Milky Way and nearby galaxies through a comprehensive, multi-scale approach.

The X-ray Universe 2026

08-11 June 2026

The X-ray Universe 2026 aims to encompass a broad range of high-energy astrophysics topics, from solar system studies to cosmology and at providing a showcase for results and discoveries from XMM-Newton as well as from the variety of other current missions.
Image Credit: @ESA_XMM

Continuing the JWST Revolution: Understanding Early Galaxy Formation

01-26 June 2026

Continuing the JWST Revolution: Understanding Early Galaxy Formation workshop brings together observers and theorists to review early star/galaxy/black-hole formation, reionisation and future strategies with facilities like JWST, ALMA, SKA and ELT.

Kyoto Torus Workshop 2026

18-22 May 2026

TORUS 2026: Multi‑wavelength approach to the AGN structures focuses on advancing our understanding of AGN structures — especially the torus — by combining multi‑wavelength observations and realistic physical models, with fresh insights from XRISM, JWST, ALMA, and simulations.

THESEUS Conference

24-26 March 2026

THESEUS 2026 will focus on the THESEUS mission concept, exploring gamma-ray bursts and high-energy transients to study the early Universe, multi-messenger astrophysics, and cosmology.

BlackHolistic 2026: Black Holes, Accretion and Jets Across the Mass Spectrum

23-27 March 2026

BlackHolistic 2026 will focus on black hole accretion and jet formation across a wide range of masses and accretion rates, bring together diverse fields from X-ray binaries and transients to AGN and cosmological simulations. The meeting aims to foster cross-disciplinary dialogue and fresh perspectives on the universal physics of accreting black holes.

The end of star formation

02-06 March 2026

The end of star formation will bring together observers, with experience at all wavelengths, and theorists working on rapid quenching at any simulation scale. With a focus on discussion and model–observation comparison, this meeting aim to identify the biggest open questions on how and why galaxies quench, and collaboratively discuss which areas are most critical for advancement.

Climbing Cosmic Peaks: Exploring the Formation and Evolution of Black Holes

02-06 March 2026

Climbing Cosmic Peaks explores the origin and growth of massive black holes (MBH), from the first cosmic seeds to accretion and mergers. It brings together observations, theory, and simulations to investigate MBH–galaxy connections and the new insights from JWST and gravitational waves.

The Growth of Galaxies in the Early Universe – XI: the Physics of Early Galaxies

19-23 January 2026

The Growth of Galaxies in the Early Universe – XI: The Physics of Early Galaxies examines the formation and evolution of high-redshift galaxies, from cosmic noon through re-ionisation, via combined observational and theoretical perspectives.

BlackHoleWeather: Toward a Unified Theory of Feeding and Feedback

15-19 December 2025

BlackHoleWeather: Toward a Unified Theory of Feeding and Feedback is a scientific workshop exploring the multi-phase processes of black hole accretion and feedback across cosmic scales. The event brings together theorists and observers to bridge high-resolution simulations with cutting-edge observations.

Highly Accreting Supermassive Black Holes Across all Cosmic Times: from the Local Universe to Cosmic Dawn

01-05 December 2025

Highly Accreting Supermassive Black Holes Across all Cosmic Times will explore the role of highly accreting supermassive black holes in galaxy evolution across cosmic time, from the local universe to the epoch of reionization. It aims to connect observational and theoretical insights into black hole growth, feedback, and their interplay with host galaxies, leveraging data from current and upcoming facilities.

XRISM International Conference 2025

20-24 October 2025

XRISM International Conference will showcase the scientific results from the mission's first two years and outline key issues for future observation cycles. Topics will also include theoretical developments relevant to XRISM data and synergies with other current and upcoming observatories.

Multi-phase, Multi-temperature and Complex

06-10 October 2025

Multi-phase, Multi-temperature and Complex delves into the evolution of galaxy clusters and groups through their interaction with the surrounding medium, with a focus on X-ray and SZ data probing the hot phase of the elusive intra-group and circum-galactic medium in low-mass halos. The workshop will also highlight the multiphase nature of the CGM and the critical role of the central galaxy.

Massive Black Holes across Cosmic Time

08-12 September 2025

Massive Black Holes across Cosmic Time brings together observers and theorists to explore the formation, growth, and impact of massive black holes across cosmic time, with a focus on new insights from JWST and multiwavelength data. Key topics include black hole demographics, mass measurements, feedback mechanisms, and the role of accretion in shaping galaxy evolution.

Tracing Cosmic Evolution with Galaxy Clusters - V

07-11 July 2025

The fifth edition of the conference on cosmic structure evolution will take place at the Sexten Center for Astrophysics. The event will focus on topics including galaxy evolution from protoclusters to massive clusters, the cosmic history of baryons, gravitational lensing, and cosmology with next-generation cluster surveys.

Vasto Accretion Meeting: AGN

30 June-04 July 2025

Vasto Accretion Meeting: AGN will explore the understanding of AGN, both their intrinsic continuum and the wind and jets which they launch, and how all these change with black hole mass, mass accretion rate and across cosmic time.

Unleashing the Power: Linking the Small and the Large in Multi-phase AGN Outflows

23-27 June 2025

Feedback from active galactic nuclei (AGN) in the form of jets and outflows is a key ingredient in galaxy evolution models. The "Unleashing the Power: Linking the Small and the Large in Multi-phase AGN Outflows" special session at EAS 2025 will bring together both observations and simulations investigating all types of AGN outflows.

XMM Data Analysis Workshop

01-03 April 2025

The workshop aims to improve the accessibility and usability of XMM data and its analysis tools, with sessions for both beginners and experienced users. It offers an introduction to the Science Analysis Software (SAS), Extended Source Analysis System (ESAS), and the XMM archive through Python notebooks and SciServer, including a discussion on contributing to pySAS development.

Celebrating 20 years of Swift Discoveries

24-28 March 2025

Launched in 2004 to study Gamma-Ray Bursts, Swift has since exceeded its goals, becoming an essential tool for transient astronomy with its rapid response and multi-wavelength capabilities. The "Celebrating 20 Years of Swift Discoveries" conference will revisit Swift's groundbreaking contributions to time-domain and multi-messenger astrophysics.