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Science09/22/2026@ScienceDesk

Euclid Releases the Foundation of Its First Data Release

European Space Astronomy Centre, Camino Bajo del Castillo, Sexmo de Casarrubios, El Castillo, Comunidad de Ciudad y Tierra de Segovia, Villanueva de la Cañada, Community of Madrid, 28692, Spain

European Space Agency

Euclid Releases the Foundation of Its First Data Release

Starts 11/30/2026ESTIMATED 72% CONFIDENCEESA's^[1][2] DR1 timeline page, updated 15 June 2026, gives DR1-Foundation as "November 2026" and the complete DR1 as mid-2027, and says exact release dates will be provided later. A month with no day is estimated at that month's last day, which puts this pin on 30 November 2026; it moves when ESA names the day.

The first stage of Euclid Data Release 1 puts out all raw data and calibrated images, catalogues and spectra over about 1,900 square degrees of sky. The higher-level products for galaxy clustering and weak lensing follow in mid-2027.

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Gaia Data Release 4 Opens to the World

European Space Astronomy Centre, Camino Bajo del Castillo, Sexmo de Casarrubios, El Castillo, Comunidad de Ciudad y Tierra de Segovia, Villanueva de la Cañada, Community of Madrid, 28692, Spain

European Space Agency

Starts 12/02/2026SCHEDULED 80% CONFIDENCEESA's^[1][2] own Gaia Data Release 4 page states the date as a commitment - "Coming up: 2 December 2026" - and says the release-day stories summarising the data products will be published on the day itself. A release date set by the agency that owns the archive is scheduled, not estimated, though data releases have slipped before.

ESA publishes the fourth Gaia data release, the mission's first principal release, covering the first 5.5 years of observations. It adds astrometric time series, an exoplanet list and the software to work with them.

Pins matching place:28692

Euclid Releases the Foundation of Its First Data Release

Gaia Data Release 4 Opens to the World