Euclid: Exploring the dark universe 


Euclid is a space survey mission dedicated to investigate the origin of the accelerating expansion of the Universe and the nature of dark energy, dark matter and gravity. Euclid will map the geometry of the Universe, and reconstruct the evolution of large scale sctructures over the last 10 billion years. Euclid was approved in 2012 as the second Medium Class mission (M2) in the ESA Cosmic Vision Programme. Euclid was launched on 1 July 2023 with a SpaceX Falcon 9 from Cape Canaveral.

The mission is optimised to measure shapes of galaxies, which are distorted by gravitational deflection of light due to dark matter concentrations, and to measure galaxy clustering, that is the non-random distribution of galaxies in the Universe resulting from the action of gravity. Euclid demands very high precision measurements and the ability to survey the sky at visible and near-infrared (NIR) wavelengths. Such requirements cannot be met from the ground, and calls for a wide-field Visible/NIR space mission. For more information see our SciTech site, and the "red book".



Latest News



Euclid satellite 30-May-2024
New de-icing operation begins
After the successful ice decontamination procedure performed in March, ESA's Euclid operation team, along with partners in science and industry, has been continuously monitoring the health of Euclid's science instrumentation. As expected, water ice remains inside the cavity where the instruments are hosted.
Read more

Euclid's First Science 23-May-2024
ESA's Euclid celebrates first science with sparkling cosmic views
Today, ESA's Euclid space mission releases five unprecedented new views of the Universe. The never-before-seen images demonstrate Euclid's ability to unravel the secrets of the cosmos and enable scientists to hunt for rogue planets, use lensed galaxies to study mysterious matter, and explore the evolution of the Universe.
The new images are part of Euclid's Early Release Observations. They accompany the mission's first scientific data, also made public today, and 10 forthcoming science papers. The treasure trove comes less than a year after the space telescope's launch, and roughly six months after it returned its first full-colour images of the cosmos.
Read more

Space Foundation Award 09-Apr-2024:
Euclid mission team honoured with Space Foundation Award
The Euclid mission team was awarded this year's Space Achievement Award by the Space Foundation, a non-profit organisation founded in 1983 to foster collaboration across the global space community. ESA Director General, Josef Aschbacher (centre), and ESA Director of Science, Carole Mundell (right), collected the prize at the Space Symposium in Colorado Springs, USA

Further details on ESA's Space Science portal.
An image gallery of the event can be accessed here (source: Space Foundation)

Euclid's sight restored 26-Mar-2024
Euclid's sight restored
A newly devised procedure to de-ice Euclid's optics has performed significantly better than hoped. Light coming in to the visible 'VIS' instrument from distant stars was gradually decreasing due to small amounts of water ice building up on its optics. Mission teams spent months devising a procedure to heat up individual mirrors in the instrument's complex optical system, without interfering with the finely tuned mission's calibration or potentially causing further contamination. After the very first mirror was warmed by just 34 degrees, Euclid's sight was restored.
Read more

Euclid starts de-icing 19-Mar-2024
Operations begin to de-ice Euclid's vision
A few layers of water ice – the width of a strand of DNA – are starting to impact Euclid's vision. After months of research, Euclid teams across Europe are now testing a newly designed procedure to de-ice the mission's optics.

Update 20 March: First results confirm successful operations Euclid's sharp vision is restored. The initial analysis of Euclid's data validates the de-icing approach devised by the team. A more in-depth analysis of the results is ongoing and an update will follow in the coming days.
Read more

Dark Universe Survey 14-Feb-2024
Ready, set, go! Euclid begins its dark Universe survey
Today, ESA's space telescope Euclid begins its survey of the dark Universe. Over the next six years, Euclid will observe billions of galaxies across 10 billion years of cosmic history. Learn how the team prepared Euclid in the months after launch for this gigantic cosmic quest.
Read more


Go to the News Archive