Data Discovery – Euclid Data Space

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EAS Public Data Release (PDR)

The PDR environment of the Euclid science archive holds public data. Euclid Q1 data was publicly released on March 19, 2025. The main component of the Q1 data contains Level 2 data of a single visit (at the depth of the Euclid Wide Survey) over the Euclid Deep Fields. Planned: in 2026

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EAS Internal Data Release (IDR)

The IDR environment of the Euclid science archive holds the data that is planned for public release. Planned: in 2026

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EAS On-the-fly Instance (OTF)

The OTF environment of the Euclid science archive, includes data as processed by the Science Ground Segment soon after acquisition to provide an access as soon as possible. In this environment the data is not reprocessed and the processing is therefore heterogeneous. Planned: in 2026

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EAS Non-regression Instance (REG)

The REG environment of the Euclid science archive is where a large area in the sky is processed with the same version for all data products. Planned: in 2026

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Patch Notes: Euclid Data Space 0.1.1

The initial release of Euclid Data Space was patched on August 15th 2025. Changes in the patch: Navigation menu and footer responsive on phone and...

August 15, 2025

Euclid mission in space, with the spacecraft's sunshield visible.

Release notes: Euclid Data Space 0.1.0

EDS provides a simple and intuitive user interface that would allow the Euclid Consortium members and the scientific community to discover, access and use (or...

Euclid Data Space: What's to come

What is Euclid Data Space? Euclid Data Space (EDS) is the reference portal for Euclid data access, exploration, analysis and documentation. EDS brings together the...

Euclid mission in space

ESA Euclid Website

Mission Overview

Mission Status

Euclid survey

Instruments

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Clusters of Galaxies

Galaxy clusters are the largest gravitationally bound structures in the universe, consisting of hundreds to thousands of galaxies embedded in dark matter and hot gas. They provide crucial insights into cosmic structure formation, dark matter, and dark energy.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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CMB/X Cross Correlation

By correlating CMB observations with X-ray data, we aim to uncover insights into cosmic structures, dark matter, and the early universe.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned in: 2026

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Cosmology Simulations

Cosmological simulations are numerical models that track the evolution of the universe from the Big Bang to the present. They incorporate physics such as gravity, dark matter, dark energy, gas dynamics, and star formation to recreate the large-scale structure of the cosmos.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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Cosmology Theory

The Cosmology Theory Working Group is dedicated to advancing theoretical frameworks that explain the universe's origin, structure, and evolution. By developing and testing models of dark matter, dark energy, and cosmic inflation, we aim to deepen our understanding of fundamental cosmological principles. Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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Galaxy & AGN Evolution

Euclid plays a crucial role in understanding the evolution of galaxies and active galactic nuclei (AGN) by mapping billions of galaxies across cosmic time. Its deep and wide-field observations help trace how galaxies and supermassive black holes (SMBHs) co-evolve from the early universe to today.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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Galaxy Clustering

The Euclid Galaxy Clustering Working Group is dedicated to unraveling the mysteries of the universe's large-scale structure. By analyzing galaxy distributions, we aim to understand dark energy, dark matter, and the fundamental forces shaping cosmic evolution.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned in: 2026

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Gravitational Waves

The Gravitational Waves Science domain is dedicated to exploring the ripples in spacetime caused by massive cosmic events. By detecting and analyzing gravitational waves, we aim to uncover insights into black holes, neutron stars, and the fundamental nature of gravity.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned in: 2026

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Local Universe

The Local Universe Working Group is dedicated to studying the galaxies, stars, and cosmic phenomena within our immediate cosmic neighborhood. By examining the structure, dynamics, and interactions of nearby galaxies, we aim to uncover insights into galaxy formation, evolution, and the influence of dark matter.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned in: 2026

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Milky Way & Resolved Stellar Populations

By analyzing the properties, distributions, and evolution of resolved stellar populations, we aim to uncover the history and dynamics of the Milky Way. Learn more about this science domain. Euclid Consortium members get access to discovery and analysis links and explanatory supplement. Planned: in 2026

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Planets

By leveraging Euclid's advanced observational capabilities, we investigate planetary atmospheres, surfaces, and internal structures to understand their formation, evolution, and potential habitability.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned in: 2026

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Primeval Universe

In the early universe, matter was distributed more uniformly, and cosmic structures like galaxies and clusters had not yet formed. Euclid’s mission involves observing how these structures evolved over time by analysing the shapes and distributions of billions of galaxies up to 10 billion light-years away.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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SNe & Transients

Euclid contributes to the study of supernovae (SN) and transient events by detecting and monitoring cosmic explosions that reveal insights into dark energy, stellar evolution, and the large-scale structure of the universe.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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Solar System Objects

Although Euclid is designed for cosmology, it also contributes to the study of Solar System Objects (SSOs) by detecting and characterising asteroids, trans-Neptunian objects (TNOs), and comets.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

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Strong Lensing

Strong gravitational lensing occurs when a massive object, like a galaxy or galaxy cluster, bends and magnifies the light from a more distant source, creating multiple images, arcs, or even Einstein rings. Unlike weak lensing, which involves small distortions across many galaxies, strong lensing produces clear, dramatic visual effects.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

Weak Lensing

Weak gravitational lensing is a key method used by the Euclid space telescope to study the large-scale structure of the universe. It occurs when the gravitational field of massive cosmic structures (like dark matter halos) slightly distorts the light from distant galaxies.

Learn more about this science domain. Euclid Consortium members get access to discovery/analysis links and explanatory supplement. Planned: in 2026

Euclid Consortium

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To be announced