Euclid Consortium

Artist impression of the Euclid mission in space. The spacecraft is white and gold and consists of three main elements: a flat sunshield, a large cylinder where the light from space will enter, and a 'boxy' bottom containing the instruments. The spacecraft is shown half in the shadow, because the sunshield will always be faced in the direction of the Sun and thus protecting the telescope from the light of the Sun. The background is a realistic representation of a deep field view of the night sky, with many galaxies visible. On the bottom half of the image, an artistic representation of the cosmic web is overlayed over the galaxies. The cosmic web is the scaffolding of the cosmos on which galaxies are built, consisting primarily of dark matter and laced with gas. The cosmic web is here represented with a grid and a two-dimensional representation of a cosmological simulation.

Euclid, our #DarkUniverse 🕵️ detective, is hard at work creating a map of the large-scale structure of the Universe across space and time.

What five mysteries is this detective trying to crack? Find out here 👉 www.esa.int/Science_Expl...

🔭

The #CM25 historic increase of 3.5% per year beyond inflation for Science will enable some of the most imaginative missions in our history and bolster European scientific leadership.

First step: deliver the #CosmicVision missions such as LISA & NewAthena. The next great leap is #Voyage2050 🔭 🧪

Roman Space Telescope's instrument package being moved by a crane inside a cleanroom facility. The package is wrapped in protective silver material and mounted on a large platform.

The nearly complete Nancy Grace Roman Space Telescope has made another set of critical strides toward launch. This fall, the outer portion passed two tests—a shake test and an intense sound blast—to ensure its successful launch: go.nasa.gov/4ooRM2L #NASARoman 🔭 🧪

Our Ministerial Council starts today. Watch the first session live from 12.30 GMT/13.30 CET to know everything about ESA's future roadmap and budget. #CM25

📺 watch.esa.int

More details 👉 www.esa.int/About_Us/Min...

Including our favourite mission, who would have thought, #ESAEuclid 😀

#space #astronomy #cosmology #science #Euclid

The Science Programme is driven by our biggest questions about the Universe and organised into long-term planning cycles.

#CosmicVision, defined in 2004, guides missions into the mid-2030s, such as Juice & Euclid.
#Voyage2050 sets the agenda for the next era of space exploration.

🔭 #CM25 2/

Europe map showcasing the flags of the ESA Member States.

ESA’s Science Programme is the backbone of European space science. We deliver pioneering missions that enable:

✨ discoveries
🤝 collaboration
💡 innovation
🤩 inspiration

impacting ESA across directorates 👉 science.esa.int

Curious how the Science Programme works? This 🧵 is for you

🔭 #CM25 1/

Sky viewing tool with Euclid's Dark Cloud in the infrared on top of a ground-based visible image.

We followed up #ESAEuclid's near-infrared image of the Dark Cloud LDN 1641 with a comparison to the NIR 2MASS survey, and to a bespoke ground-based image in visible light.

Here's the comparison including a tool to experiment yourself:

www.euclid-ec.org/clouds-darkn...

#ESA #space #science 🔭

Lessons from the November 2025 solar storm

Not only #ESAEuclid saw the recent massive solar proton and X-ray outbreaks. Some of @esa.int's other sats actually did science with it:

#astronomy #space

www.esa.int/Space_Safety...

Dis Jamy, quelles peuvent être les conséquences d'une grosse éjection de masse coronale solaire ? 🤓

➡️ Sur Terre : ✨ de jolies aurores ✨

➡️ Sur les instruments d'Euclid : 💩💩💩

Explications, avec des images du satellite de la semaine dernière ! ⬇️ #astro #aurores #science #auroras

The solar flare that caused aurora here on Earth a few days ago, also caused a blizzard of particle impacts on @ec-euclid.bsky.social's detectors. Very nice explainer by @james4cet.bsky.social www.euclid-ec.org/here-comes-t... 🧪🔭

YouTube video by Euclid Consortium Infrared vs Optical: Euclid reveals what lies within and behind the Dark Cloud

Beautiful comparison of @ec-euclid.bsky.social's infrared view of an interstellar dark cloud, compared to what we see in optical light 🧪🔭 www.youtube.com/watch?v=MlmQ...

We also created a viewer tool for the Dark Cloud image from Euclid and in the visible, and 2MASS in the background – for you to zoom and pan around.

Here's the background and access to all comparison sliders and tools:

www.euclid-ec.org/clouds-darkn...

#ESAEuclid #astronomy #space #Euclid

🧵

Comparison of the same cutout of the Dark Cloud image as seen by 2MASS (left) and Euclid NISP (right).

We asked amateur astronomy colleagues to create for us a colour-image in visible light of the same region. They delivered!

Also, we added a comparison to 2MASS, the so-far go-to near-infrared all-sky survey.

Let's say ... there are differences.

#ESA #ESAEuclid #astronomy #space

🧵

YouTube video by Euclid Consortium Infrared vs Optical: Euclid reveals what lies within and behind the Dark Cloud

Do you remember the 'Dark Cloud' image of LDN 1641 from #ESAEuclid that was released by @science.esa.int two weeks ago? We now added a comparison to a ground-based image in visible light:

www.youtube.com/watch?v=MlmQ...

#ESA #Euclid #astronomy #space

🧵

Euclid has since recovered and its map of the Universe continues!

Visit the @ec-euclid.bsky.social blog to read more about Euclid's battles against space weather: www.euclid-ec.org/here-comes-t... 📖

Remember that lovely aurora last week?

Well...um...this is what Euclid saw... 😱

🧵

Snapshot of a part of Euclid VIS detectors, almost saturated with cosmic ray hits.

Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.

www.euclid-ec.org/here-comes-t...

#ESA #Sun #SpaceWeather #space

Pendant que le @comea-sw.bsky.social était heureux avec les aurores des dernier jours nous sur Euclid ça a été très difficile, on a perdu 2 jours de données 😱

Sometimes it feels like that. 😠

We should also have added #astronomy, even though this is rather anti-astronomy.

Snapshot of a part of Euclid VIS detectors, almost saturated with cosmic ray hits.

Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes.

www.euclid-ec.org/here-comes-t...

#ESA #Sun #SpaceWeather #space

Yes, what _are_ the lasers for, @eso.org and why doesn't #ESAEuclid have any!? 😠

(Actually the first part is very nicely explained in the video – and also tells why Euclid doesn't need any.) 😀

Registration deadline is 9. November!

Attendance is free, no attendance fee (just cover travel and lodging).

Details and registration here:

www.cosmos.esa.int/web/working-...

3/3

#ESAEuclid #Astronomy #ESA #Space

Banner "Working with Euclid Q1: from Data Access to Science Workshop, 1-3 December 2025, ESAC, Madrid, Spain

Reminder: @science.esa.int is hosting a workshop "Working with #Euclid Q1: from Data Access to Science" in a hybrid format at ESAC, Madrid, Spain, and online – from 1.-3. December 2025.

This event will bring together researchers with + without prior experience using #ESAEuclid data.

1/

#ESA 🔭

Registration deadline is 9. November!

Attendance is free, no attendance fee (just cover travel and lodging).

Details and registration here:

www.cosmos.esa.int/web/working-...

3/3

#ESAEuclid #Astronomy #ESA #Space

Goals:

* Showcase new scientific results based on Euclid Q1 data.
* Explore research areas where Euclid data can be used.
* Learn how to work with Euclid Q1 using Euclid Data Space, Euclid Science Archive, ESASky, and ESA Datalabs.

Format will have talks, posters, demos, tutorials.

2/

#Euclid 🔭

Banner "Working with Euclid Q1: from Data Access to Science Workshop, 1-3 December 2025, ESAC, Madrid, Spain

Reminder: @science.esa.int is hosting a workshop "Working with #Euclid Q1: from Data Access to Science" in a hybrid format at ESAC, Madrid, Spain, and online – from 1.-3. December 2025.

This event will bring together researchers with + without prior experience using #ESAEuclid data.

1/

#ESA 🔭

This new Euclid collage, based on the Q1 data set, presents 28 nearby galaxies observed by Euclid.
Each of the 28 galaxies can be explored directly in ESASky:
www.cosmos.esa.int/web/euclid/e...

ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre, E. Bertin, G. Anselmi

Euclid peers through a dark cloud’s dusty veil

🔭🌌 Klarer Blick durch den galaktischen Nebel 👀: Das Weltraumteleskop #Euclid blickt durch eine Wolke aus Staub und Gas und zeigt unzählige junge Sterne ✨. Eines der 2 Instrumente des Teleskops (Near-Infrared Spectrometer and Photometer) wurde übrigens in 🇩🇪 entwickelt. 🛠️

www.esa.int/ESA_Multimed...