(19 Mar) Euclid’s First Big Data Drop Maps 26 Million Galaxies to Illuminate the Dark Cosmos
The mission’s first large set of survey data is a treasure trove for clues about the history of the universe.
https://s.faithcollapsing.com/v43lu
Archive: ais: https://archive.md/wip/lxcfu ia: https://s.faithcollapsing.com/6fnm0
[Zoom on the #CosmicWeb] Have you dived into the deep fields of #Euclid revealed this Wednesday by the @ec_euclid ? Have you navigated between the thousands of #galaxies of different shapes, sizes, colors and masses? So many objects, near and far, fill our #Universe! https://sky.esa.int/esasky/?hide_welcome=true&hide_banner_info=true&hips=DES-DR2+ColorIRG&sci=false&layout=esasky&euclid_image=EDFS
What if their spatial distribution could tell us something about two mysterious components : #DarkMatter and #DarkEnergy? This is the gamble taken by the scientists involved in the Euclid mission. To do so, they've designed some unrivalled #instruments: a camera with great depth of field and high resolution records the variety of shapes and spatial distribution of galaxies, while a #spectrometer coupled with a #photometer can determine the distances and masses of galaxies ...
Alain Blanchard, professor at the University of Toulouse and researcher at IRAP, comments on the consortium's first-ever publication of scientific data: https://www.irap.omp.eu/en/2025/03/euclid-telescope-reports-first-results/
Einblick in die Tiefen des Weltalls 
: Das Weltraumteleskop @ec_euclid der #ESA lieferte neue, hochauflösende Daten für die Wissenschaft. Ein Team um Francine Marleau vom Institut für Astro- und Teilchenphysik konnte darin Tausende von Zwerggalaxien identifizieren.
https://www.youtube.com/watch?v=rXCBFlIpvfQ
Mehr dazu: https://www.uibk.ac.at/de/newsroom/2025/tausende-zwerggalaxien-entdeckt/
My mind is still a bit blown from #Euclid telescope images last night.
When I zoomed in on a tiny patch of sky — field of view: 7.1' x 3.6, which is about the size of a grain of rice held at arms length — there was so much to see.
Walls and walls of galaxies. And then more walls of galaxies behind this.
Each galaxy hosts hundreds of billions of stars and there are millions of them, all, in this tiny field of view.
We are tiny tiny creatures.
Scientists hail ‘avalanche of discoveries’ from Euclid space telescope
Data from European Space Agency’s mission has allowed researchers to create detailed catalogue of 380,000 galaxies
On 19 March 2025, the European Space Agency’s Euclid mission released its first batch of survey data, including a preview of its deep fields. Here, hundreds of thousands of galaxies in different shapes and sizes take centre stage and show a glimpse of their large-scale organisation in the cosmic web.
The Euclid space telescope captures 26 million galaxies in a first data drop.
The European Space Agency has released the first batch of large-scale images from the Euclid space telescope, which astronomers have already used to find hundreds of strong gravitational lenses.
During a six-year mission, Euclid will image about one-third of the sky to illuminate how dark matter and dark energy behave on cosmic scales.
All the goosebumps 
#ESA's #Euclid hunting for the 95 unknown % of the Universe:
https://youtu.be/rXCBFlIpvfQ?si=5WfdNrFA8oarjBZG
More information on this first release of a batch of survey data, including a preview of Euclid deep fields:
Yes, the data is publicly available!
Euclid ‘quick’ releases, such as this, are of selected areas, to demonstrate the data products to be expected in the major data.
This earlier thread has some more info on the ESA Euclid mission including some technical details of the telescope.
https://fosstodon.org/@AkaSci/110638590040160036
Euclid timeline:
Launch: July 1 2023.
First engineering images: Nov 6 2023.
Early release images: May 23, 2024.
First data release: March 19, 2025.
A catalogue of more than 380,000 #galaxies: the first comprehensive data release of the #Euclid space telescope sets standards and provides insights into the depths of the #universe - thanks in part to strong German participation !
https://mpg.de/24349746/euclid-data-release
@mpi_astro
@MPE_Garching
It's #Euclid data release day!
#ESA and the Euclid Consortium are making 63 deg² of Wide Survey data available to the world. Imaging and spectroscopy data, catalogues and masks for 20+ million galaxies, quasars, stars and substellar objects.
This "Q1" data release is aimed both at the community to sharpen their tools for the 30x larger DR1 expected in late 2026, as well as to enable a first set of science projects across cosmic time.
Q1 is accompanied by the presentation of 7 Euclid Consortium data release publications, and an initial batch of 27 science papers.
Read more in the Consortium press release: https://www.euclid-ec.org/public/press-releases/euclid-quick-data-release-1/
And the ESA release webstory: https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_opens_data_treasure_trove_offers_glimpse_of_deep_fields
#ESA and the Euclid Consortium will have the first larger "Q1" science data release and publication of a major batch of #Euclid science papers coming week, March 19th.
Journalists can receive material under embargo starting tomorrow, March 14th, 12:00 CET. If you are interested then please sign up at
https://blogs.esa.int/forms/subscription-for-under-embargo-press-releases/
Later today, the first commercial launch of an #Ariane6 rocket is planned, after the maiden flight in July 2024 that was mostly successful. Ariane 6 had been the backup launcher for #Euclid for many years.
Originally and for many years, Euclid was slated to launch on a Russian #Soyuz from French Guyana, which changed following the invasion of Ukraine and the subsequent stop of collaboration of #ESA with Roskosmos, the company behind Soyuz.
After this, Ariane 6 became the primary launcher on launch slot 4 or 5, but given that Euclid was almost ready for launch already in 2022, alternatives were looked into, and in the end Euclid successfully launched with a US company on 1 July 2023.
So we've been following #Ariane6's development for a while. All the best for this launch 
.
Next #ESA #astronomy mission to be launched with Arianne 6 is the #exoplanet satellite #PLATO, towards the end of 2026.
All about today's launch: https://www.esa.int/Enabling_Support/Space_Transportation/Ariane
We are very happy to announce that #Euclid's Einstein Ring in NGC6505 is Astronomy Picture of the Day:
Un très rare anneau d'Einstein découvert par le télescope spatial Euclid
https://www.rts.ch/info/sciences-tech/2025/article/euclid-decouvre-un-rare-anneau-d-einstein-dans-une-galaxie-proche-28786115.html
#télescope #espace #science #astronomie #astrophysique #Euclid #Einstein #galaxies #lentillegravitationnelle
Space telescope spots rare "Einstein ring" of light around galaxy in our cosmic neighborhood.
From @AssociatedPress: "An Einstein ring is light from a much more distant galaxy that bends in such a way as to perfectly encircle a closer object, in this case a well-known galaxy in the constellation Draco."
Das Euclid-Weltraumteleskop hat einen seltenen Einstein-Ring fotografiert. Der perfekte Lichtkreis entsteht durch Gravitationslinseneffekt und gibt Einblicke in die Masse einer Galaxie. #Euclid #Astronomie https://winfuture.de/news,148740.html?utm_source=Mastodon&utm_medium=ManualStatus&utm_campaign=SocialMedia
Euclid Discovers Einstein Ring in Our Cosmic Backyard https://www.nasa.gov/universe/euclid-discovers-einstein-ring-in-our-cosmic-backyard/ #NASA #Euclid #Astrophysics #DarkEnergy #DarkMatter #DarkMatterDarkEnergy #JetPropulsionLaboratory #TheUniverse
Some scientific discoveries shake up my brain.
https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_discovers_a_stunning_Einstein_ring
On the one hand, it almost blows my mind when I think about it further. On the other hand, it's wonderfully reassuring to realise that there are a lot more important and fascinating things in this cosmos than some evil guys on two small legs.
Le 13 janvier prochain, je serai au Collège de France @collegedefrance parler de l'une des grandes questions actuelles de l'astrophysique : l'énergie noire.
Mon séminaire aura lieu dans lieu lors de la dernière séance du cycle "Le secteur sombre de l’Univers : matière et énergie noires" de Françoise Combes, titulaire de la chaire Galaxies et Cosmologie. J'explorerai les différentes théories possibles et leurs implications pour l’avenir de l’Univers, en mettant l'accent sur les résultats que nous allons pouvoir obtenir grâce à Euclid @ec_euclid, la mission spatiale de l'ESA. 
Quand ? Le 13 janvier 2025 à 17h45 
Où ? Amphithéâtre Marguerite de Navarre, Site Marcelin Berthelot, Collège de France, Paris (ou en ligne plus tard !)
