Symposia S10  29-30 Jun 2026

Euclid: the first 2000 square degrees of the cosmos

Aims and scope

The Euclid mission, launched in July 2023 by the European Space Agency with contributions from NASA, is designed to create the most detailed map of the universe ever produced. It is situated at Lagrange Point 2 and uses a 1.2-meter telescope and advanced visible (VIS) and near-infrared (NISP) instruments to survey about 14,000 square degrees of the sky. Over its six-year mission, Euclid is measuring the shapes, positions, and distances of billions of galaxies, some as far away as 10 billion light-years. Its goal is to understand the nature of dark matter and dark energy and the history of the expansion of the universe, and enable a plethora of studies for legacy science.

Euclid will have its first major public data release, DR1, in late October 2026. The Euclid Consortium has already started to analyse the 2000 deg² of DR1, comprising calibrated VIS and NISP images and near-infrared spectra, stacked images, object catalogues, redshifts, and classifications. With supporting external data from DES, DESI and UNIONS and simulations it will produce summary statistics and cosmological constraints. DR1 also contains Euclid Deep Field data over 53 deg². This symposium will showcase the Euclid Consortium?s initial DR1 results, introduce the material that will be made public with this release, and present the access routes and processing options that will be available to the community in just a few months.

Over the next few years, Euclid results will be synergistically combined with data from Roman and Rubin/LSST to produce the most complete object catalogue of our universe.

Programme

The list of topics covered include:

  • Cosmology
  • High-z Universe
  • Large-scale structure
  • Galaxy evolution
  • Nearby galaxies
  • Active Galactic Nuclei
  • Gravitational waves
  • Milky Way
  • Interstellar medium
  • Time domain
  • Stellar evolution
  • Exoplanets
  • Solar system
  • Data Science & Archives
  • Surveys & Instruments


We plan to structure the Symposium in 6 sessions organised as follows:

Session 1: Euclid Mission: Overview, timeline and processing This session will provide a comprehensive introduction to the Euclid mission: its scientific goals, instruments, expected performance, and key outcomes from calibration and commissioning. It will also outline the data processing pipeline and present the schedule and content of upcoming data releases.

Session 2: Cosmology with Euclid and synergies with other experiments This session will highlight the prospects for cosmological discoveries over the coming decade, focusing on Euclid?s contribution in combination with DES, DESI, UNIONS, Roman, and Rubin/LSST. It will also provide an update on the status of Euclid?s cosmology analysis with DR1 data, ahead of the public release and unblinding.

Sessions 3-4-5: Euclid science highlights from internal and public data releases These sessions will showcase scientific results based on Euclid?s internal and public data releases, covering a wide range of topics including Active Galactic Nuclei, Galaxy Evolution, Exoplanets, Strong Lensing, Transients and Supernovae, Solar System Objects, and studies of the Nearby Universe.

We will reserve at least 2 lots of 15 minutes each for flash talks on ePosters

Session 6: Exploring the Euclid survey: data products and access This session will introduce the data products included in Euclid?s public releases and demonstrate how to access and work with the processed data. A demonstration will

Invited speakers

We plan to have the following review talks: The Euclid Mission and its Instruments Cosmological Analysis with Euclid Euclid in the context of Stage IV Cosmology Experiments First Results from Euclid DR1 Euclid Data Releases: Content and Access Invited Speakers to be confirmed

Scientific organisers

Mathilde Jauzac (Durham University, UK) Katarina (Dida) Markovic (JPL - Caltech/NASA, USA) Francine Marleau (University of Innsbruck, Austria) David Navarro Gironés (Leiden Observatory, Netherlands) Masamune Oguri (Chiba University, Japan) Cristobal Padilla (IFAE, Barcelona, Spain) (Chair) Kerry Paterson (MPIA, Heidelberg, Germany)

Contact

Cristobal.Padilla @ ifae.es

Updated on Fri Feb 06 18:21:53 CET 2026
European Astronomical Society