Euclid offers glimpse of deep fields – new data published

The region of sky now imaged represents the largest single region of sky ever measured simultaneously, yet it is still only a small fraction of what is expected. New results based on observations from the Euclid Space Telescope were published in March 2025.
Useita gravitaatiolinssejä
Examples of gravitational lenses described by Euclid. ESA/Euclid/Euclid Consortium/NASA

The new publication covers only 0.45% of Euclid's final mapping area. The wide field of view and high resolution of the Euclid space telescope already make this data extremely valuable, and the Euclid consortium scientists have already achieved a huge number of interesting results. Observations include strong gravitational lenses, galaxy clusters, active galactic nuclei, quasars, dwarf galaxies and variable objects. The results are presented in 27 scientific publications. In addition, 7 technical papers describing the Euclid data processing process will be published.

"The latest release will also serve as a good warm-up for testing Euclid's processing and analysis capabilities," says Aku Venhola from the University of Oulu, who is responsible for processing Euclid's Earth-based data from the northern celestial region. "If we compare the celestial region published now with, say, the region imaged by the Hubble Space Telescope in 30 years, we have already reached the same scale. The scientific value of Euclid's data is enormous, as the papers published today show."

Tutkija ja teleskooppi. Taustalle on heijastettu kuva avaruudesta.
University lecturer Aku Venhola is impressed by the Euclid telescope's vast views of the universe, and the scientific data it provides. Photo by Mikko Törmänen / University of Oulu

The Euclid consortium includes more than 2600 researchers from over 300 laboratories or research institutions in 15 European countries, plus the United States, Canada and Japan. The Finnish partners include the Universities of Helsinki, Oulu, Turku and Jyväskylä, Aalto University, and CSC, the Centre for Scientific Computing. One of the nine Euclid data centres is located in Finland.

Kuva yötaivaasta
A picture of the night sky. The areas described by Euclid are marked in yellow. Image: ESA/Euclid/Euclid Consortium/NASA; ESA/Gaia/DPAC; ESA/Planck Collaboration

See Euclid's stunning images and read more in English on ESA's website

Read more about space physics and astronomy research at the University of Oulu

Last updated: 2.4.2025