News Archive 2025

 

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An image of space made by the Euclid telescope shows a bright barred spiral galaxy with two sweeping arms glowing in shades of blue and white against a deep black background dotted with stars. Its core is luminous. Its spiral arms curve gracefully outward to the left and down to the right, resembling a cosmic garland draped across the scene. A smaller, faint and round galaxy appears to the left of the barred spiral galaxy. 22-Dec-2025
Euclid's galaxy garland
Galaxy NGC 646 sparkles like a cosmic holiday garland in this new image from the European Space Agency's Euclid space telescope.
This large barred spiral galaxy is located in the constellation Hydrus and was discovered in 1834 by the British astronomer John Herschel (the son of William Herschel). The galaxy is moving away from us at about 8145 km per second. It's located roughly 392 million light-years from Earth, which means its light takes hundreds of millions of years to reach us.
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The image displays a portion of LDN 1641, an interstellar nebula in the constellation of Orion. In this view, a deep-black background is sprinkled with a multitude of dots (stars) of different sizes and shades of bright white. Across the sea of stars, a web of fuzzy tendrils and ribbons in varying shades of orange and brown rises from the bottom of the image towards the top-right like thin coils of smoke. 05-Nov-2025
Euclid peers through a dark cloud's dusty veil
This shimmering view of interstellar gas and dust was captured by the European Space Agency's Euclid space telescope. The nebula is part of a so-called dark cloud, named LDN 1641. It sits at about 1300 light-years from Earth, within a sprawling complex of dusty gas clouds where stars are being formed, in the constellation of Orion.
In visible light this region of the sky appears mostly dark, with few stars dotting what seems to be a primarily empty background. But, by imaging the cloud with the infrared eyes of its NISP instrument, Euclid reveals a multitude of stars shining through a tapestry of dust and gas.
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A collage of 7x4 images displaying the most striking nearby galaxies observed by Euclid in visible and near-infrared light 05-Nov-2025
Euclid Nearby Galaxies Collage
The galaxies captured by Euclid reveal a Universe rich in structure and diversity. Within its first Q1 public data release, the mission uncovered millions of systems ranging from compact ellipticals to sprawling spiral galaxies.
This new collage, based on the Q1 data set, presents 28 of the most striking nearby galaxies observed by Euclid in visible and near-infrared light.
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Image extracted from the Euclid Flagship simulations catalogue, showing the large-scale mass distribution of the Universe, forming clumps, filaments, and voids. 22-Sep-2025
A virtual Universe for Euclid: the largest cosmological simulations catalogue is now public
Launched in July 2023, the Euclid mission of the European Space Agency (ESA) is currently in space scanning a third of the sky over a 6-year-period. Today, the largest synthetic galaxy catalogue ever built has been published by the Euclid Consortium, featuring simulations of more than 3.4 billion galaxies to match Euclid's sharp eyes. The catalogue has been developed by an international team, led by the Institute of Space Sciences (ICE-CSIC) and the Port d'Informació Científica (PIC).
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Red Euclid logo patch over a grid of galaxy images taken by Euclid 15-Sep-2025
Workshop: 'Working with Euclid Q1: From Data Access to Science'
The workshop, organized by the European Space Astronomy Centre (ESAC), will take place 1-3 December 2025. It will focus on the data made available in March 2025 with the ESA Euclid Q1 data release, and will bring together researchers with and without prior experience using Euclid data to showcase new scientific results based on Euclid Q1 data, explore research areas where Euclid data can be used, and learn how to work with Euclid Q1 using Euclid Data Space, Euclid Science Archive, ESASky, and ESA Datalabs.
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Euclid expected coverage for Data Release 1 (DR1) 13-Aug-2025
Euclid Data Release 1: Expected Coverage
The anticipated sky coverage for the Euclid Data Release 1 (DR1) is now available. The images display the area targeted by the Euclid Wide Survey as well as the observations intended for DR1 processing.
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Euclid Galactic Bulge Survey area 13-Aug-2025
Euclid Galactic Bulge Survey
On March 23rd 2025 the ESA Euclid telescope was pointed towards a location close to the Galactic Centre, in order to obtain an unprecedented deep, wide-field, high-resolution view of the inner bulge region of our Milky Way galaxy. As well as offering an unprecedented crisp view of stars over a wide area of the inner Galaxy, the principal science driver of the Euclid Galactic Bulge Survey is to assist in the search for exoplanets.
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Photo of Antonio La Marca 08-Jul-2025
Meet the Euclid Q1 Authors: Antonio La Marca
Interview with Antonio La Marca, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Antonio La Marca's work centers on galaxy mergers and their connection to Active Galactic Nuclei.
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Photo of Giorgia Girardi 24-Jun-2025
Meet the Euclid Q1 Authors: Giorgia Girardi
Interview with Giorgia Girardi, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Giorgia Girardi's work centers on optically faint, red objects in the Euclid Deep Fields.
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Photo of Bruno Altieri, Euclid Archive Scientist, giving a talk in front of some seated public, with one of the Euclid images at his back 21-Jun-2025
ESA's science missions at the International Paris Air Show 2025
On the second public day of the International Paris Air Show 2025, visitors had the opportunity to explore ESA's latest scientific missions aimed at uncovering the secrets of the Universe. Bruno Altieri, Archive Scientist at ESA, highlighted how Euclid is revolutionising our understanding of the Universe's expansion and the formation of cosmic structures.
ESA's science missions at the International Paris Air Show 2025
ESA at Le Bourget 2025 - Day Six Highlights

Photo of Malgorzata Siudek 10-Jun-2025
Meet the Euclid Q1 Authors: Malgorzata Siudek
Interview with Malgorzata Siudek, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Malgorzata Siudek's work centers on a multi-modal foundation model used to explore galaxy properties.
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Photo of William Hartley 27-May-2025
Meet the Euclid Q1 Authors: William Hartley
Interview with William Hartley, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
William Hartley's work centers around the photometric redshifts and physical properties of galaxies through the PHZ processing function.
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Photo of Federica Tarsitano 13-May-2025
Meet the Euclid Q1 Authors: Federica Tarsitano
Interview with Federica Tarsitano, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Federica Tarsitano's work centers around red quasars selection.
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Galaxy Cluster Abell 2390 12-May-2025
"Euclid on Sky" is live!
The newly published special issue of the journal "Astronomy and Astrophysics", featuring 10 science papers based on the Early Release Observations is available online: https://aanda.org/component/toc/?task=topic&id=2064.
The issue also includes an overview of the processing pipeline used, and reference papers describing Euclid and its instruments.

The data and images from Euclid's Early Release Observations can be accessed from ESA's press release of May 2024.

Photo of Christopher Duffy 29-Apr-2025
Meet the Euclid Q1 Authors: Christopher Duffy
Interview with Christopher Duffy, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Christopher Duffy's work centers around photometric studies of known transients.
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Photo of Clotilde Laigle 15-Apr-2025
Meet the Euclid Q1 Authors: Clotilde Laigle
Interview with Clotilde Laigle, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Clotilde Laigle's work centers around data processing and galaxy formation within the cosmic web.
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Photo of Michael Walmsley 03-Apr-2025
Meet the Euclid Q1 Authors: Michael Walmsley
Interview with Michael Walmsley, author of one of the selected scientific papers submitted to the Arxiv on 19th March 2025, date of the Euclid Q1 data release, using Euclid Q1 data.
Michael Walmsley's work centers around galaxy morphology and strong lensing.
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New Catalogue Release 19-Mar-2025
Euclid opens data treasure trove, offers glimpse of deep fields
On 19 March 2025, the European Space Agency's Euclid mission released its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shapes and sizes take centre stage and show a glimpse of their large-scale organisation in the cosmic web.
Further details on ESA's Science & Exploration portal.
Access the related video here.
A press briefing recording can be found here.

New Catalogue Release 14-Mar-2025
Follow the reveal of Euclid's new catalogue on 19 March
The European Space Agency is releasing the first catalogue of astronomical data from the Euclid space telescope, including three new enormous image mosaics with zoom-ins. Follow the reveal live on Wednesday 19 March at 11:00 BST / 12:00 CET.
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Eifel Ring 10-Feb-2025
Euclid discovers a stunning Einstein ring
Euclid, the European Space Agency’s dark Universe detective, has made an astonishing discovery – right in our cosmic backyard.
During the early testing phase, in September 2023, Euclid sent some images back to Earth. They were deliberately out of focus, but in one fuzzy image Euclid Archive Scientist Bruno Altieri saw a hint of a very special phenomenon and decided to take a closer look.
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Weak gravitational lensing 13-Jan-2025
Euclid ESLAB Symposium: Registration is now open
The next 56th ESLAB 2025 is planned to happen on 24-26 March 2025 in Leiden, jointly to the annual Euclid consortium meeting which will take place in parallel during that week.
ESLAB aims at bringing together the Euclid Consortium community and the scientific community to explore new ideas of how to use Euclid data.
You may register at the Symposium web site: https://www.cosmos.esa.int/web/euclid-eslab-2025
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