European
Southern
Observatory
ESO Science Newsletter May 2026
25 May 2026

This newsletter is a summary of recent ESO Science Announcement items. Follow the links or visit ESO Science Announcements to read more.



Science Announcements


Record Number of Proposals Submitted for ALMA Cycle 13

07 May 2026:

ALMA is pleased to report on the extraordinary response to the Cycle 13 Call for Proposals, which closed on 23 April 2026. Cycle 13 received a total of 1,843 proposals, accounting for more than 37,000 hours requested time on the 12-m Array. These numbers set a new record, underscoring the high level of competition for ALMA.

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Extended Deadline: High Angular Resolution Science with Next-Generation Optical-Infrared Capabilities at ESO - Exploiting MAVIS and ELT Instruments in the 2030s, ESO Garching, 1-4 September 2026

04 May 2026:

This international conference, jointly organised by ESO, INAF - Arcetri and Macquarie University, aims to bring together the diverse scientific communities developing and preparing to exploit these instruments. Although each facility has unique strengths - MAVIS pushing diffraction-limited performance into the visible on an 8-m telescope, and the ELT instruments delivering unmatched infrared sensitivity and resolution on a 39-m aperture - their science cases are deeply complementary.

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Joël Vernet Appointed as ELT Programme Scientist

29 Apr 2026:

The Extremely Large Telescope (ELT) is proceeding rapidly with expected first telescope light in 2029 and first science light in late 2030. To oversee the scientific coordination of this facility, Joël Vernet has been hired as the ELT Programme Scientist through an international call, replacing Michele Cirasuolo.

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New Data Release of GRB180728A_SN2018fip

24 Apr 2026:

A new spectroscopic dataset of the gamma-ray burst (GRB) 180728A and its associated supernova SN 2018fip is now publicly available through the ESO Science Archive Facility. The release comprises 13 epochs of observations obtained with the X-shooter instrument at ESO's Very Large Telescope (VLT), covering the evolution of the GRB afterglow and the emergence of the associated supernova. The dataset provides a detailed time series that enables studies of the transition from afterglow-dominated emission to supernova-dominated spectra.

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Third Release of VST-OMEGACAM Imaging Products from the Collaboration with INAF

23 Apr 2026:

The VLT Survey Telescope (VST) at Paranal is now owned and operated by INAF, which is responsible for processing the data and releasing them via the ESO Archive. Imaging data products included in the current DR3 for a number of projects were obtained using the wide-field camera OmegaCAM with the g, r, i, and z filters. 

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Upcoming ESO or ESO-related workshops
 

The stellar 'Initial Mass Function' (IMF) is a fundamental observable and a crucial component for the understanding of a vast range of astrophysical processes. It is suspected to have its roots in the mass distribution of dense molecular cloud cores resulting from molecular cloud fragmentation, but what shapes this 'Core Mass Function' (CMF) and how core masses really relate to stellar masses, remains unclear. This ESO workshop will summarize and discuss recent observational and theoretical progress on these questions and explore ways forward with ongoing progress in instrumentation (e.g., ALMA upgrade, ELT(s))

 

AGN feedback has become a key element in understanding how galaxies evolve. The time is ripe to discuss what has been learned and plan future lines of research also in the context of upcoming facilities. The workshop will take place on July 6-10, 2026, at the ESO Headquarters in Garching near Munich. Do not miss the chance to present your work and participate in shaping the future of this exciting scientific area! 

 

ESO's Expanding Horizons process aims to identify the main scientific challenges that will face European astronomers in the 2040s, and the type of transformational ground-based facility that will be required to address these fundamental questions. Following the call for Scientific White Papers in late 2025 -an initiative designed to galvanise the European astronomical community to engage in the Expanding Horizons process- this meeting will bring together astronomers from a wide range of research backgrounds to present their vision of what the key scientific questions will be 2040s. It will also be a platform to investigate the potential synergies between the different scientific themes, the required facilities and the key enabling technologies needed for the 2040s and beyond.

 

Given the success of its first edition, ESO is delighted to announce the second edition of its Summer School on Writing and Communicating your Science to be held in Garching, from 20-24 July 2026. The school will cover important topics such as how to write compelling papers and proposals and how to give convincing talks. Dedicated sessions will further guide you through the process of preparing successful proposals, understand the publication landscape and the refereeing process, write professional job applications, and be prepared for a successful career. The school comprises many hands-on and fun activities to make it an unforgettable experience.

 

The coming decade will mark a transformative era for high–angular resolution astronomy. With the arrival of the Extremely Large Telescope (ELT) and its first‐generation instruments - MICADO, HARMONI, and their AO component MORFEO - together with the next generation of high-sky-coverage adaptive-optics facilities in the optical on the VLT, such as MAVIS, the astronomical community will, for the first time, routinely access spatial resolutions of ~40 mas across the optical and infrared domains, with high sensitivity and diverse spectral and imaging capabilities. This unprecedented development will open new parameter spaces for exploring the formation and evolution of stars, planets, and galaxies, as well as probing the physics of compact objects and the distant Universe.This international conference at ESO aims to bring together the diverse scientific communities developing and preparing to exploit these instruments.

 

The developments over the past decades in high-resolution and multi-object spectroscopy have enabled transformative insights into stars, stellar systems and populations, our Galaxy, and extrasolar planets. In turn, these have triggered the construction of a new generation of powerful instruments that will characterise fainter and more distant systems with unprecedented detail and/or statistical power, opening new windows in our understanding of the exoplanet population, galactic archaeology, and fundamental physics. This conference will bring together communities working on instrumentation, stellar and exoplanet astrophysics, and chemical evolution, serving as a launchpad for reviewing the scientific landscape, new challenges, and future priorities.

 

Type II supernovae (SNeII) are among the brightest and most common stellar explosions in the Universe, signaling the dramatic final chapters in the lives of many massive stars. These events originate from massive stars—those with initial masses exceeding eight times that of the Sun—that have retained most of their hydrogen-rich envelopes. As these stars reach the end of their life cycles, their iron cores collapse, unleashing a burst of neutrinos and a shock wave that powers the ensuing explosion and its striking luminosity.

This workshop will create a dedicated space to confront such questions through both observational and theoretical perspectives exploring the connections between pre-supernova stellar structure, explosion dynamics, and observable features. The most up-to-date findings using hydrodynamical simulations, radiative transfer modeling, archival or new multi-wavelength observations, light curve and spectral modeling, and machine-learning-based classifications in time-domain surveys will all be welcome contributions. Furthermore, contributions will be targetted that link SNeII to broader astrophysical contexts, such as dust production, galactic feedback, chemical enrichment, and their utility as cosmological distance indicators.

 

Observations with the VLT, VLTI, and ALMA have pioneered exoplanet science over the past decade. With upcoming results from ESA missions such as Gaia, PLATO, and Ariel, exoplanet research is entering a transformative era of large-scale characterisation surveys. This ESO workshop will bring the community together to explore how current ESO facilities together with powerful archival resources, can best complement exoplanet demographics, atmospheres, and planet formation at the dawn of population-scale studies.

 

This workshop will focus mostly on quiescent and non-accreting galactic nuclei. These systems are essential for understanding the full range of nuclear evolutionary pathways, complementary to studies of accreting AGNs. At the same time, new observing facilities provide fresh opportunities: GRAVITY+, operational from 2026, will deliver early high-precision interferometric results on both quiescent galactic nuclei and AGN, extending stellar dynamical studies into regimes not previously accessible. The Vera C. Rubin Observatory (LSST) will begin uncovering large samples of tidal disruption events (TDEs) and other nuclear transients, providing powerful probes of otherwise dormant black holes. Other current and future facilities will add complementary perspectives, broadening the discovery space. 
 
The workshop will therefore provide a timely forum to assess recent progress, present first results from new facilities, and discuss how the scientific focus of this field will develop in the coming decades. 

 

Thermal infrared astronomy is entering a pivotal decade, driven by cutting-edge instrumentation and a growing range of science applications. At ESO, facilities such as MATISSE and VISIR and the newly operational ERIS provide high spatial and spectral resolution that enables detailed studies of protoplanetary disks, exoplanet atmospheres, evolved stars, and obscured galactic nuclei. In parallel, JWST/MIRI is delivering transformative science with unmatched sensitivity from space, highlighting the power of infrared observations. Looking to the future, TAO is bringing ground-based IR observations to literal new heights at Chajnantor with instruments like MIMIZUKU, VLTI/NOTT will allow new views of exoplanets thanks to mid-IR nulling and ELT/METIS will be pushing to new sensitivities in upcoming years. In space, potential projects like LIFE and PRIMA promise to continue expanding our view of the obscured universe.

The IR2026 conference will look to the both the past and the future, looking at the legacy of the soon to be decommissioned VISIR, what we have learnt so far from MIRI and MATISSE, and to prepare for the new instruments on the horizon.