Euclid Releases First Major Dataset From 13 Months of Sky Survey

The European Space Agency released Euclid’s first major mission-data collection, designated DR1-Foundation, on November 12, 2026. It draws on 13 months of observations made from spring 2024 to spring 2025.

Key details

• The release covers about 14% of Euclid’s planned six-year survey.
• It captures light from more than 1 billion objects across an area of sky roughly equivalent to 9,500 full moons.
• The data include spectra from 160 million sources, more than 900 million galaxies and 60 million quasar candidates.
• The collection includes 15,000 strong gravitational-lensing candidates.

DR1-Foundation includes more than 900 million galaxies and 60 million quasar candidates.

Why it matters

Euclid’s survey will support research into dark matter, dark energy, galaxy clusters and the large-scale structure of the universe. Researchers can use its observations to build a three-dimensional map of the cosmos.