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
ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins72% CONFIDENCEOverall confidence: 72%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% 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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