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Institut d'Estudis Espacials de Catalunya (IEEC) @ieec.cat · 12/06/2026

Reposted by ARRAKIHS

The @arrakihs-mission.eu has successfully completed the preliminary design phase and has been adopted by @esa.int 🔝 It is the first ESA Science Programme mission led by Spain, with a prominent role for #IEEC researcherts at the @ice-csic.bsky.social 👉 www.ieec.cat/en/arrakihs-...

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Instituto de Astrofísica de Andalucía (IAA-CSIC) @iaacsic.bsky.social · 11/06/2026

✔️ ARRAKIHS, la primera misión del Programa Científico de la ESA liderada por España, inicia su fase de desarrollo para su lanzamiento en 2030 🌐 www.iaa.csic.es/noticia/arra... @arrakihs-mission.eu @csic.es @csicandalucia.bsky.social

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Universität Wien / University of Vienna @univie.ac.at · 11/06/2026

Das Projekt @arrakihs-mission.eu der @esa.int soll neue Erkenntnisse zu einer der wichtigsten Fragen der modernen Astrophysik gewinnen: Wie entstehen & entwickeln sich Galaxien im Rahmen des Standardmodells der Kosmologie? Die Universität Wien leitet die österreichische Beteiligung an der Mission.🌌

univie.ac.at

Universität Wien an Weltraummission ARRAKIHS der ESA beteiligt

Uni Wien steuert Bordsoftware zur Enthüllung von lichtschwachen Galaxien bei

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ARRAKIHS @arrakihs-mission.eu · 11/06/2026

TOWARD 2030!!🎉 @esa.int officially adopts ARRAKIHS as F2 Mission: Europe leads the exploration of the low surface brightness universe 🗞️Find out everything about this news: 🔗: l1nq.com/fyaabd8 🔗: l1nq.com/yi92j21

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ARRAKIHS @arrakihs-mission.eu · 05/06/2026

Describe in 1 to 3 words… 🟣ARRAKIHS 🟣The importance of the V ARRAKIHS Consortium Meeting 🟣Red Book* 🟣 Next week (2nd week of June 2026) *the document outlining the mission’s scientific case, objectives, and the technical foundations supporting the project. ( @esa.int )

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ARRAKIHS @arrakihs-mission.eu · 27/05/2026

Closer than ever to making it a reality ✨🚀 The V #ARRAKIHS Consortium Meeting marked a major milestone: 📕 Red Book delivered to @esa.int 🛰️ Latest preliminary instrument design presented by SATLANTIS And this is only the beginning… ⚠️ June 10–11 will be key dates for the mission. 🔗: bit.ly/4u3Mlcm

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Centro de Estudios de Física del Cosmos de Aragón (CEFCA) @cefca-oaj.bsky.social · 20/03/2026

Este nombramiento reconoce el trabajo colectivo del sector y proyectos como @arrakihs-mission.eu , la primera misión de la @esa.int liderada por España, en la que participa #CEFCA Tuvimos la oportunidad de compartir ciencia, proyectos e ilusión en su visita al Observatorio Astrofísico de Javalambre

ARRAKIHS @arrakihs-mission.eu · 14/04/2026

Biuse Casaponsa (Project Office) giving a talk as part of "Expandiendo la Ciencia", an @ifca.es ( @csic.es - @univcantabria.bsky.social ) program bringing science to all schools in Cantabria. This time at CEPA Santoña.

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ARRAKIHS @arrakihs-mission.eu · 23/02/2026

Did you miss Raúl Infante ( @cefca-oaj.bsky.social ) talking yesterday about #ARRAKIHS on #LaCuriosidadSalvoAlGato on @aragontv.bsky.social? 📺 Here’s the link to the program — he appears starting at 16:43 👇 alacarta.aragontelevision.es/programas/la...

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ARRAKIHS @arrakihs-mission.eu · 11/02/2026

To mark the International Day of Women and Girls in Science ( #11F ), we’ve created a memory challenge. You’ll need to match 6 female astrophysicists with their discoveries 💜🔭👩🏽‍🔬 Are you ready?: bit.ly/4qO4N7j

bit.ly

Memory game - Puzzel.org

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ARRAKIHS @arrakihs-mission.eu · 09/02/2026

The penguin has been found… and it brought great news! 🐧📚 The ARRAKIHS Instrument iPDR data package has been officially delivered on time! ⚡️ Congratulations to everyone who contributed to this amazing work! #NihilistPenguin #iPDR #ARRAKIHS #Instrument

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ARRAKIHS @arrakihs-mission.eu · 27/01/2026

How do we prepare a space mission before it observes the Universe? 🤔 With simulations. ARTEMIS simulations + machine learning help predict the properties of faint galaxy halos, preparing us for future ARRAKIHS observations 🌌 🔗 Read it here: www.arrakihs-mission.eu/2026/01/13/e...

Visualisation of one galaxy, but simulated many times assuming different parameters that control the detailed way in which massive stars explode at the end of their lives.

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ARRAKIHS @arrakihs-mission.eu · 23/01/2026

🚀 Exciting Opportunity Alert! We're expanding our team and looking for a Postdoctoral Position in the detector Characterization Group, at IFAE. ➡️ Click here to apply: ifae.es/careers/jobs... #hiring #joboffer

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ARRAKIHS @arrakihs-mission.eu · 09/01/2026

✨How many galaxies should #ARRAKIHS observe? Simulations suggest ~80–84 gives a strong chance of capturing the diverse range of stellar halos needed for significant science, a smart balance of ambition and feasibility 🚀🌌 🔗 arrakihs-mission.eu/2025/12/19/h...

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Reposted by ARRAKIHS

ESA Space Science @science.esa.int · 19/11/2025

In 2022, #Arrakihs was selected as a fast mission under #CosmicVision. By imaging Milky Way-type galaxies in the nearby Universe, Arrakihs will provide important measurements to address key questions in galaxy formation theory. 1/ #CM25 🔭

A 4 x 4 collage of ground-based images of nearby galaxy halos with stellar streams. Arrakihs will observe stellar streams 10 times fainter than these halo features.

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ARRAKIHS @arrakihs-mission.eu · 31/12/2025

The ARRAKIHS Mission Consortium wishes you a happy 2️⃣0️⃣2️⃣6️⃣!! 🎉🎊 #HappyNewYear

ARRAKIHS @arrakihs-mission.eu · 12/12/2025

🔭 New research shows that AI models like SAM can measure galaxy sizes with ~1% accuracy. This could be key for ARRAKIHS, helping detect faint halos, tidal streams, and other low–surface-brightness features that trace galactic evolution and dark matter. 📲 bit.ly/4pZR113 @cefca-oaj.bsky.social

arrakihs-mission.eu

A New AI Tool to Map the Outskirts of Galaxies - ARRAKIHS Mission

Determining the size of a galaxy requires identifying the point at which its light distribution shows a clear decline, a feature often referred to as its truncation. This boundary offers valuable info...

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ARRAKIHS @arrakihs-mission.eu · 17/11/2025

A major boost for ARRAKIHS: The HARKONENS Project 💫 Led by Santi Roca Fábrega (Lund Univ.) and Corentin Cadiou (@iap.fr), has been awarded 234M CPU hours on @eurohpc-ju.bsky.social to run next-gen cosmological simulations supporting our mission. 🔗 www.arrakihs-mission.eu/2025/11/17/a...

arrakihs-mission.eu

A major boost for ARRAKIHS: The HARKONENS Project - ARRAKIHS Mission

We’re thrilled to announce a major milestone for the ARRAKIHS Project. The HARKONENS Project is led by Santi Roca Fábrega (Lund University, Sweden) in close collaboration with Corentin Cadiou (IAP, Fr...

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ARRAKIHS @arrakihs-mission.eu · 06/11/2025

Our colleague Raúl Infante (@cefca-oaj.bsky.social ), contributor to the Data Analysis (DAT), Coordination with other Surveys (CDR) and Data Reduction (RED-SCI) work packages, gave a talk at a #UNED course on November 4th 🤗

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ARRAKIHS @arrakihs-mission.eu · 29/10/2025

Our PI, Rafael Guzmán ( @ifca.es ), presented the #ARRAKIHSmission at the Spanish Space Agency (AEE) . We thank Juan Carlos Cortés (AEE), and Isabel Pérez Grande (AEE) , for their support and for fostering collaboration within Spain’s growing space ecosystem. 🔗 sl1nk.com/Sc443

ARRAKIHS @arrakihs-mission.eu · 20/10/2025

When small galaxies meet big ones 💫 The #AGORA project explores how dwarf satellite galaxies stop forming stars , a process called “quenching”. What #ARRAKIHS will help us uncover. 📌 Ramón Rodríguez Cardoso (@ucm.es, GMV) 🔗 goo.su/R0s4d

Gas density of the same subhalo across the different models during their infall to the host halo. Each column represents a different model, while each row indicates the same infall stage: (a) first snapshot at a distance to the host lower than , (b) at , (c) during the first apocenter, and (d) during the second infall, slightly before the second pericenter. From the time evolution we can distinguish how gas is stripped during infall and how virial radius is decreasing due to tidal stripping. Efficiency of stripping mechanisms is highly sensitive to the model.

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ARRAKIHS @arrakihs-mission.eu · 03/10/2025

Last Friday, some of our @ifca.es researchers took part in the #ERN2025 in Santander. They were with the little ones, doing #ARRAKIHS puzzles as part of the science challenge 🧩 Thank you for your collaboration! 🙌🏼 @univcantabria.bsky.social @csic.es @csicdivulga.bsky.social

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ARRAKIHS @arrakihs-mission.eu · 10/09/2025

🔭📜🌌 Fossil Archives of the Universe Joanna Sakowska ( @iaacsic.bsky.social ) explains how galactic halos reveal the history of galaxies 📹: youtu.be/3qIq8QJ3aYk

Fossil Archives of the Universe ~ How galactic halos reveal the history of galaxies

ARRAKIHS @arrakihs-mission.eu · 05/09/2025

🚀 Exciting Opportunity Alert! We're expanding our team and looking for a Product/Quality Assurance Engineer to join ARRAKIHS Mission at Satlantis. ➡️ Click here to apply: www.satlantis.com/job/product-... #hiring #JobAlert #JobOffer

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ARRAKIHS @arrakihs-mission.eu · 01/09/2025

A map of the sky! 🟢 Green = higher sensitivity 🔵 Blue = harder to see faint details 🔴 Red dots = sample galaxies (not the final list, but an example of the #ARRAKIHS selection process). Credit: J. Román (@ucm.es)‬

A map of the sky with sample galaxies, not the final list, but an example of how scientists build a clean selection for study.

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ARRAKIHS @arrakihs-mission.eu · 06/08/2025

ARRAKIHS prepares for orbit! 🛰️ A technical training campaign at Javalambre Observatory ( #CEFCA ) tested the iSIM-170 camera, a key instrument for the mission to study dark matter from space. 🔗 bit.ly/45AxiOa #ARRAKIHS #ESA #DarkMatter #iSIM170 #Astrophysics #OAJ

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ARRAKIHS @arrakihs-mission.eu · 18/07/2025

How faint can we go? With #ARRAKIHS + VIS2, we can detect #galaxy features as dim as 31 mag/arcsec² 🌌 Using mock images, we subtracted stars, cleaned backgrounds, and applied astnoisechisel to extract even the faintest signals. Credit: Helena Domínguez Sánchez

ARRAKIHS @arrakihs-mission.eu · 07/07/2025

Dark matter ≠ Dark energy But what’s the difference?🤔 Alex Riley (@durham-university.bsky.social), member of WP COS and GAL, breaks it down. 📹: youtu.be/unN_h1VhbjQ

Dark matter vs Dark energy

ARRAKIHS @arrakihs-mission.eu · 30/06/2025

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📻🎙️ If you missed it live, here it is: rtve.es/play/audios/... (The #interview starts at minute 29) #ARRAKIHS #radio #rne #neudc

Rafael Guzmán being interviewed by Pepa Fernández on "No es un día cualquiera (RNE)"

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ARRAKIHS @arrakihs-mission.eu · 27/06/2025

🎙️This Sunday at 11 AM, ARRAKIHS goes on air! Pepa Fernández interviews our Principal Investigator, Rafael Guzmán, on Spanish national radio at "No es un día cualquiera". #rne #neudc

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ARRAKIHS @arrakihs-mission.eu · 17/06/2025

🛰️ How will #ARRAKIHS reveal the invisible #universe? Hugo Rosado (DEIMOS), Mission Planning Coordinator, explains how the mission will observe faint galaxies and uncover the structure of #darkmatter once in orbit. 🎥 youtu.be/a3IbBdOHY04 #ESA #telescope #spacemission

How will ARRAKIHS reveal the invisible universe?

ARRAKIHS @arrakihs-mission.eu · 13/06/2025

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Great week at #SATLANTIS for the #ARRAKIHS Instrument Intermediate Design and Analyses Review (IIDAR) workshop 🛰️ Key step ahead of PDR, with progress, collaboration & good conversations in Leioa. Thanks to all involved!🤗 🔗 www.arrakihs-mission.eu/2025/06/13/a... @esa.int #SpaceMission #workshop

ARRAKIHS consortium members at the IIDAR workshop held at Satlantis.

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Reposted by ARRAKIHS

RTVE Noticias @rtvenoticias.rtve.es · 24/05/2025

Arrakihs, la primera misión espacial española, busca desvelar los secretos del universo oscuro dozz.es/stleg1

dozz.es

Arrakihs, la primera misión espacial española, busca desvelar los secretos del universo oscuro

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ARRAKIHS @arrakihs-mission.eu · 23/05/2025

💫 First observations with the Ground Demonstrator (OGD) at the Javalambre Astrophysical Observatory! 💫 1️⃣ M101, Pinwheel Galaxy 2️⃣ M42, Orion Nebula 3️⃣ M81, Bode’s Galaxy #astrophysics #groundobservations #ARRAKIHS #OGD @cefca-oaj.bsky.social #Satlantis @ifca.es #space #mission

M101, Pinwheel Galaxy
Larger than our Milky Way and bursting with star-forming regions—like cosmic fireworks in deep space.

M42, Orion Nebula
A stellar nursery just 1,344 light-years away, where hundreds of new stars are being born right now.

M81, Bode’s Galaxy
A beautiful spiral glowing with the energy of a supermassive black hole—70 million times the mass of our Sun.

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Reposted by ARRAKIHS

Institut d'Estudis Espacials de Catalunya (IEEC) @ieec.cat · 23/05/2025

The ground-based demonstrator of @arrakihs-mission.eu is already capturing images! 🌌 The @esa.int mission, led by @ifca.es, will provide key information about dark matter. Researchers from #IEEC at @ice-csic.bsky.social are taking part 🔝 @cefca-oaj.bsky.social 👉 www.ieec.cat/en/arrakihs-...

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ARRAKIHS @arrakihs-mission.eu · 23/05/2025

🚀 #ARRAKIHS begins its scientific prepararion at the Javalambre Observatory! A ground-based replica of the space camera is now operational—testing key tools and strategies ahead of launch. 🔗 goo.su/jB9Pvt @ifca.es @cefca-oaj.bsky.social #Satlantis #groundobservations #galaxy #space #mission

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ARRAKIHS @arrakihs-mission.eu · 05/05/2025

⚡️Are you into stellar streams, galaxies and dark matter? We’re offering a JAE Intro 2025 #research #scholarship at @ifca.es 🔍 Topic: Analysis of stellar streams 📍 Location: Santander, Spain ⏳ Duration: 7 months 💶 Grant: 600 €/month 🔗 goo.su/nsUJk @csic.es @csicdivulga.bsky.social

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ARRAKIHS @arrakihs-mission.eu · 02/05/2025

The 4th ARRAKIHS Consortium meeting took place at @univie.ac.at! 73 team members met in person to advance #mission planning and scientific goals. 🚀 🔗 www.arrakihs-mission.eu/2025/05/02/4... #ARRAKIHS #darkmatter #spacemission #consortium #meeting #vienna

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ARRAKIHS @arrakihs-mission.eu · 08/04/2025

We joined the #iconicobjects trend with the iSIM-170 camera, developed by #Satlantis and key to the #ARRAKIHS mission. It’s designed to reveal the faintest light in the universe using a unique binocular #telescope. 📦 Would you collect it? 👀 #ai #darkmatter

ARRAKIHS @arrakihs-mission.eu · 04/04/2025

A few days ago, Santi Roca-Fàbrega (Lund University), our #Cosmological Simulations WP Coordinator, participated in #SpaceResearchersSweden2025 in #Kiruna, where he presented #ARRAKIHS to the scientific community and representatives from the #SwedishSpaceAgency.

ARRAKIHS @arrakihs-mission.eu · 28/03/2025

Denis Erkal (@derkal.bsky.social), one of our contributors, is an expert in galaxy modeling at the @uniofsurrey.bsky.social He has given a talk focused on the Milky Way’s formation and dark matter properties 🌌 #ARRAKIHS #GalaxyModels #DarkMatter #MilkyWay

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ARRAKIHS @arrakihs-mission.eu · 24/03/2025

ARRAKIHS at #CosmosClub! 🚀 Our colleague Rebekka Coles-Bieri (UZH) introduced the #mission to a broader audience, sparking discussion and engagement! ✨🔭 @raumschiff.bsky.social #ARRAKIHS #DarkMatter #Cosmos #SXS #ESA #spacemission

ARRAKIHS @arrakihs-mission.eu · 07/03/2025

Because of this #internationalwomensday, three of the #ARRAKIHS women share with us their stories, their dreams… The universe has no limits. Neither do we ✨💜 👤Rebekka Coles-Bieri (UZH), Laura Burgos (Satlantis) and Paola Kögl (KOEGL Space) #8M #IWD2025 #darkmatter ▶️https://youtu.be/IhKz1QhA5VQ

ARRAKIHS x 8M 💜