A languid spiral galaxy appears draped against deep space in a stunning new image from the European Space Agency’s Euclid telescope.
Euclid launched in 2023 on a six-year mission to map the cosmos at scale,
observing billions of galaxies stretching as far away as 10 billion light-years from Earth.
The effort could reveal how galaxies form and evolve and how the universe has expanded over its 13.8-billion-or-so-year history.
The case for an Astrometric Mission Extension of Euclid - Extending Gaia by 6 magnitudes with Euclid covering one-third of the sky: #Euclid Has 8 Extra Years of Fuel - A Scientist Has A Brilliant Plan To Use It: https://www.universetoday.com/articles/euclid-has-8-extra-years-of-fuel-a-scientist-has-a-brilliant-plan-to-use-it
Euclid preparation. Cosmology Likelihood for Observables in Euclid (CLOE). 4: Validation and Performance
Collaboration, Martinelli, Pezzotta, Sciotti, Blot, Bonici, Camera, Ca\~nas-Herrera, Cardone, Carrilho, Casas, Davini, Di Domizio, Farrens, Goh, Beauchamps, Ili\'c, Joudaki, Keil, Le Brun, Moretti, Pettorino, S\'anchez, Sakr, Tanidis, Tutusaus, Ajani, Crocce, Giocoli, Legrand, Lembo, Lesci, Girones, Nouri-Zonoz, Pamuk, Tsedrik, Bel, Carbone, Duncan, Kilbinger, Lacasa, Lattan…
Euclid preparation. Cosmology Likelihood for Observables in Euclid (CLOE). 5. Extensions beyond the standard modelling of theoretical probes and systematic effects
Collaboration, Goh, Nouri-Zonoz, Pamuk, Ballardini, Bose, Ca\~nas-Herrera, Casas, Franco-Abell\'an, Ili\'c, Keil, Kunz, Le Brun, Lepori, Martinelli, Sakr, Sorrenti, Teixeira, Tutusaus, Blot, Bonici, Bonvin, Camera, Cardone, Carrilho, Di Domizio, Durrer, Farrens, Beauchamps, Joudaki, Moretti, Pezzotta, S\'anchez, …
Euclid: Discovery of bright $z\simeq7$ Lyman-break galaxies in UltraVISTA and Euclid COSMOS
R. G. Varadaraj, R. A. A. Bowler, M. J. Jarvis, J. R. Weaver, E. Ba\~nados, P. Holloway, K. I. Caputi, S. M. Wilkins, D. Yang, B. Milvang-Jensen, L. Gabarra, P. A. Oesch, A. Amara, S. Andreon, N. Auricchio, C. Baccigalupi, M. Baldi, S. Bardelli, A. Biviano, E. Branchini, M. Brescia, S. Camera, G. Ca\~nas-Herrera, V. Capobianco, C. Carbone, J. Carretero, M. Castellano, G. Castignani, S. Cavuoti, …
Euclid preparation. Cosmology Likelihood for Observables in Euclid (CLOE). 6: Impact of systematic uncertainties on the cosmological analysis
Collaboration, Blot, Tanidis, Ca\~nas-Herrera, Carrilho, Bonici, Camera, Cardone, Casas, Davini, Di Domizio, Farrens, Goh, Beauchamps, Ili\'c, Joudaki, Keil, Le Brun, Martinelli, Moretti, Pettorino, Pezzotta, Sakr, S\'anchez, Sciotti, Tutusaus, Ajani, Crocce, Fumagalli, Giocoli, Legrand, Lembo, Lesci, Girones, Nouri-Zonoz, Pamuk, Pourtsid…
Galaxy Zoo: Cosmic Dawn -- morphological classifications for over 41,000 galaxies in the #Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey: https://arxiv.org/abs/2509.22311 -> Cosmic Dawn at the Galaxy Zoo: https://astrobites.org/2025/12/03/galaxy-zoo-cosmic-dawn/
I was proving the Uniqueness of Prime Factorisation to my older daughter (11) yesterday, and it turned out to be trickier than I remembered. I had to do Euclid's lemma, and that involved explaining proof by induction, and I was just worried that I was losing her when she said "Oh! Like John Finnemore's biscuits?" and the day was saved.
So: A toast to John Finnemore's Inductive Biscuit Politeness Theorem!
Cosmology Likelihood for Observables in \Euclid (CLOE). 1. Theoretical recipe
Collaboration, Cardone, Joudaki, Blot, Bonici, Camera, Ca\~nas-Herrera, Carrilho, Casas, Davini, Di Domizio, Farrens, Goh, Beauchamps, Ili\'c, Keil, Le Brun, Martinelli, Moretti, Pettorino, Pezzotta, S\'anchez, Sakr, Sciotti, Tanidis, Tutusaus, Ajani, Crocce, Giocoli, Legrand, Lembo, Lesci, Girones, Nouri-Zonoz, Pamuk, Tsedrik, Bel, Carbone, Duncan, Kilbinger, Lacasa, Lattanzi, Sapone, Sellentin, Tayl…
Automated #galaxy sizes in Euclid images using the Segment Anything Model: https://arxiv.org/abs/2412.03642 -> A New AI Tool to Map the Outskirts of Galaxies
Galaxy Zoo: Cosmic Dawn -- morphological classifications for over 41,000 galaxies in the Euclid Deep Field North from the Hawaii Two-0 Cosmic Dawn survey
James Pearson, Hugh Dickinson, Stephen Serjeant, Mike Walmsley, Lucy Fortson, Sandor Kruk, Karen L. Masters, Brooke D. Simmons, R. J. Smethurst, Chris Lintott, Lukas Zalesky, Conor McPartland, John R. Weaver, Sune Toft, Dave Sanders, Nima Chartab, Henry Joy McCracken, Bahram Mobasher, Istvan Szapudi, Noah East, Wynne Turner, Matthew M…
Continuing the #ag2025goerlitz coverage with a picture from #Euclid towel for solving the @… conference #puzzler https://www.g-vo.org/puzzlerweb/puzzler2025-solution.pdf - we had actually just stared at the constellation boundaries in https://iauarchive.eso.org/public/themes/constellations/ for a while and guessed correctly. ;-)
Replaced article(s) found for astro-ph.CO. https://arxiv.org/list/astro-ph.CO/new
[1/1]:
- Euclid preparation. XLI. Galaxy power spectrum modelling in real space
Euclid Collaboration, et al.
Replaced article(s) found for astro-ph.GA. https://arxiv.org/list/astro-ph.GA/new
[1/1]:
- Euclid: Galaxy morphology and photometry from bulge-disc decomposition of Early Release Observations
L. Quilley, et al.