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📢 Applications are now open for Grand Prix Resonance Artists and collectives based in Geneva are invited to submit proposals for a two-month residency #AtCERN, to expand their practice and develop a new artistic project in dialogue with the Laboratory’s scientific community.

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CERN @cern.bsky.social · 07/10/2026

CERN’s newest exhibition is opening to the public 💫 “Why? It matters.” is a free temporary exhibition that combines scientific content, objects, images, interactive displays, and audiovisual installations. Join us #AtCERN, starting tomorrow. 😉 🔗 Find out more: sciencegateway.cern/why

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CERN @cern.bsky.social · 07/10/2026

Beam tests boost #FCC detector technologies 🔬 The recent beam tests #AtCERN offered the first opportunity to evaluate two new calorimeter technologies under study for International Detector for Electron Accelerator (IDEA), both of which showed promise for future large-scale developments.

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CERN @cern.bsky.social · 07/10/2026

The 2026 Nobel Prize in #physics has been awarded to Francis Halzen for his contributions to the IceCube Neutrino Observatory, which discovered high-energy neutrinos coming from far beyond our Solar System. IceCube is a CERN Recognized Experiment. Read more: home.cern/cern-congrat...

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CERN @cern.bsky.social · 01/10/2026

CERN entrepreneurship highlighted in global innovation report 🚀 The 2026 Global Innovation Index puts the spotlight on CERN Venture Connect (CVC), a programme that connects entrepreneurs with CERN technologies, experts, and partners to turn scientific innovation into real-world solutions.

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CERN @cern.bsky.social · 30/09/2026

First petals installed in the ATLAS Inner Tracker Strips Endcap 💫 A major milestone has been reached in the construction of the @atlasexperiment.bsky.social Inner Tracker (ITk), with the installation of the first nine ‘petals’ of the ITk Strips Endcap at DESY in Germany.

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CERN @cern.bsky.social · 29/09/2026

Happy birthday CERN! 🎉 #OnThisDay 72 years ago, CERN officially came into being, bringing together 12 founding Member States with a shared vision for science and international collaboration. Discover the story behind 72 years of science: home.cern/about/who-we...

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CERN @cern.bsky.social · 24/09/2026

Predicting the economic impact of the #HiLumiLHC 📈 The upgrade of the Large Hadron Collider is expected to return nearly twice its cost to society. Read more: home.cern/predicting-t... 📸 Cédric Favero/CERN 2025 Photowalk

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CERN @cern.bsky.social · 23/09/2026

Preparing the road to #HiLumiLHC 💫 The @cmsexperiment.bsky.social is installing the new electronic system for the Drift Tube (DT) chambers, after multiple years of designing and building them. Find out more: home.cern/science/long...

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CERN @cern.bsky.social · 22/09/2026

CERN’s Isotope Separator On-Line facility (ISOLDE) is undergoing a transformation, to consolidate and upgrade the transfer line connecting it to the Proton Synchrotron Booster. The transfer line is being reconfigured to deliver 2 GeV proton beams to ISOLDE.

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CERN @cern.bsky.social · 18/09/2026

Strong evidence for quantum entanglement between Z bosons found by ATLAS and CMS💫 The mind-bending phenomenon is now becoming evident in a new particle. Find out more: home.cern/strong-evide...

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CERN @cern.bsky.social · 17/09/2026

The disconnection of the LHC has begun 🧲 Work has begun to disconnect the focusing magnets on either side of the @atlasexperiment.bsky.social and @cmsexperiment.bsky.social, a key step on the road to the #HiLumiLHC. Read more about it: home.cern/the-disconne...

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CERN @cern.bsky.social · 17/09/2026

Welcome to the September/October edition of CERN Courier 💫 This issue reports on the projected socioeconomic returns of the #HiLumiLHC, on a first-principles computation of the strong coupling, and much more. Read more: cerncourier.com

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CERN @cern.bsky.social · 17/09/2026

CERN launches its new public events season 💫 At a time when CERN is preparing for the #HiLumiLHC, the new public events season named Faisceaux d’avenir (Beams of Tomorrow), looks to the future of science and explores its connections with society. 🔗 voisins.cern/en/faisceaux-davenir/

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CERN @cern.bsky.social · 07/09/2026

A decade of hunting dark matter 💫 The NA64 experiment #AtCERN has searched for dark matter since 2016 by looking for energy that goes missing when particles strike its detector. Find out more: home.cern/na64-a-decad...

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CERN @cern.bsky.social · 02/09/2026

Exceptional transport operations to make way for #HiLumiLHC 💫 The first two massive components of the Large Hadron Collider (#LHC) have been removed from the accelerator tunnel following a complex handling operation. Find out more: home.cern/exceptional-...

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CERN @cern.bsky.social · 31/08/2026

All CERN accelerators now are on the road to #HiLumiLHC 💫 The accelerator complex and Antimatter Factory delivered their last beams, marking the end of the #LHCRun3 and the start of major upgrade work to prepare for the #HiLumiLHC era. Find out more: home.cern/all-cern-acc...

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CERN @cern.bsky.social · 31/08/2026

The tracker is scheduled to fly to the Space Station in 2027 aboard a SpaceX Cargo Dragon, where it will be installed on top of AMS using the ISS’s robotic arm. A series of spacewalks (EVAs) will be required to complete its mechanical and electrical connection to AMS.

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CERN @cern.bsky.social · 31/08/2026

From 28 June to 27 July, Layer-0 was hung from a robotic arm in CERN’s North Area undergoing final tests before spaceflight. Layer-0 measures the charge sign and momentum of charged particles and has been developed by the AMS collaboration #AtCERN as part of the upgrade of the AMS detector.

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CERN @cern.bsky.social · 31/08/2026

The Alpha Magnetic Spectrometer (AMS) is a particle-physics detector attached to the outside of the ISS, searching for Dark Matter, #antimatter and missing matter. Here we see “Layer-0”, a new layer of silicon sensors which will be mounted on top of the AMS while it orbits Earth on the ISS.

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CERN @cern.bsky.social · 28/08/2026

77 tonnes on the move 🚚 On 22 July, the 77-tonne JFSU-C, a shielding component used in the @atlasexperiment.bsky.social , was transported from the ATLAS cavern to Building 191 – the technical workshop and integration facility used for assembling and testing large components of the experiment.

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CERN @cern.bsky.social · 27/08/2026

ATLAS and CMS narrow in on twin Higgs production 🔎 Finding one #HiggsBoson was hard enough, but physicists at the Large Hadron Collider (#LHC) are hunting for something even more elusive: pairs of Higgs bosons.

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CERN @cern.bsky.social · 26/08/2026

An experiment at the Paul Scherrer Institute in Switzerland used novel technologies to demonstrate the feasibility of the positron-source concept for the proposed Future Circular Collider at CERN. #FutureCollider Find out more: home.cern/positrons-pass-test-for-the-future-circular-collider/

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CERN @cern.bsky.social · 19/08/2026

n_TOF experiment sheds light on ancient stardust ✨ The first experimental determination of the neutron capture of niobium-94 by n_TOF researchers marks a milestone in efforts to understand the composition of ancient stardust. Read more: home.cern/n_tof-experi...

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CERN @cern.bsky.social · 11/08/2026

Training the world’s future quantum experts 💪 From 10 to 12 July 2026, CERN and the Open Quantum Institute (OQI) hosted the second edition of the Quantum Materials Hackathon, which brought together 34 students of over 30 nationalities. Find out more: home.cern/training-the...

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CERN @cern.bsky.social · 05/08/2026

With the LHC at room temperature, technicians and engineers will be able to work on the accelerator as it is transformed into the #HiLumiLHC during LS3, a phase of major maintenance and upgrade work.

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CERN @cern.bsky.social · 05/08/2026

For only the third time since it began operating in 2008, the Large Hadron Collider (#LHC) is slowly being returned to room temperature after being kept at close to -271°C, just above absolute zero. Read more more: home.cern/science/long...

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CERN @cern.bsky.social · 04/08/2026

The current tracker needs replacing to prepare the detector for the higher collision rates expected at the High-Luminosity LHC (#HiLumiLHC). Find out more about the road to #HiLumiLHC: home.cern/science/long... #FranceAtCERN @cnrs-in2p3.bsky.social p3.bsky.social @iphc-strasbourg.bsky.social

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CERN @cern.bsky.social · 04/08/2026

CNRS delivers a major component of the future CMS detector at CERN 💫 Last month, the first major mechanical structure of the future tracker of the @cmsexperiment.bsky.social has arrived #AtCERN.

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CERN @cern.bsky.social · 24/07/2026

Oxygen collisions at the LHC show new indications of extreme state of matter 🌟 All four main #LHC experiments have found new signs that oxygen and neon collisions may create the extreme state of matter that existed during the first microseconds after the #BigBang

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CERN @cern.bsky.social · 23/07/2026

📸 Credits: 1. Cover by Philippe Dinault 2. Julien Marius Ordan 3. & 4. CERN 5. X-ray, NASA/CXC/CfA/Á Bogdán; infrared, NASA/ESA/CSA/STScI; processing, NASA/CXC/SAO/P Edmonds and L Frattare 6. Max Badulin

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CERN @cern.bsky.social · 23/07/2026

Welcome to the July/August edition of CERN Courier 💫 This issue reports on a ten-year search for a dark sector through missing energy, the open-source framework that unified beam simulation #AtCERN, two decades in which particle physics went global, and much more. Read more: cerncourier.com

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CERN @cern.bsky.social · 21/07/2026

Reading the layers beneath Lake Geneva 💧 Understanding what lies beneath the surface is essential to assessing any major underground infrastructure project. Find out more about the geological investigations for the FCC studies: voisins.cern/fr/node/2973 #FutureCollider

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CERN @cern.bsky.social · 21/07/2026

#HiLumiLHC: new magnets reach full power 💫 The new generation of quadrupole magnets at the IT String test facility has reached its nominal current, validating key technologies for the #HiLumiLHC. Find out more: home.cern/hilumi-lhc-n...

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CERN @cern.bsky.social · 20/07/2026

The puzzle of neutrinos, seventy years on Theorised in 1930 and discovered in 1956, the elusive neutrino still keeps many of its secrets, inspiring research efforts at CERN and around the world. Find out more: home.cern/the-puzzle-o... #Neutrino70 #Neutrino #ParticlePhysics #Science

Wolfgang Pauli in 1955, with an image of the telegram he received the following year informing him of the discovery of the neutrino. (Image: Wolfgang Pauli Archive/CERN)

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CERN @cern.bsky.social · 17/07/2026

CMS explores subtle matter–antimatter difference using beauty mesons⚛️ The CMS experiment uses its largest sample of beauty mesons to date to perform a high-precision test of subtle differences between matter and #Antimatter Find out more: home.cern/cms-explores...

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CERN @cern.bsky.social · 02/07/2026

One million visitors and counting 🥳 On 1 July, #CERNScienceGateway reached a new milestone as it welcomed its one millionth visitor. Find out more: home.cern/le-portail-d...

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CERN @cern.bsky.social · 30/06/2026

The most technologically complex machine… Hear from Oliver Brüning, CERN’s Director for Accelerators and Technology, about the engineering challenges behind the Large Hadron Collider #LHC.

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CERN @cern.bsky.social · 29/06/2026

So long #LHC and thank you for all the collisions 👋 Today, the Large Hadron Collider (LHC), the world’s most powerful particle accelerator, comes to the end of an extraordinary chapter in its scientific journey. Find out more: home.cern/cern-bids-fa...

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CERN @cern.bsky.social · 26/06/2026

AMS releases new cosmic-ray measurements 🌌 The new data from the precision particle-physics detector on the International Space Station provides fresh insights into the nature of cosmic rays. Find out more: home.cern/ams-releases...

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CERN @cern.bsky.social · 24/06/2026

CLOUD experiment #AtCERN uncovers a major new source of marine aerosol particles 🌊 Find out more: home.cern/cloud-experiment-uncovers-a-major-new-source-of-marine-aerosol-particles/

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CERN @cern.bsky.social · 23/06/2026

CERN’s socio-economic contributions as a global research hub 🌍 The new study “Assessment of the socio-economic benefits of CERN activities” highlights the scientific, technological, economic and societal benefits generated by CERN over the past 25 years. Find out more: home.cern/new-study-hi...

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CERN @cern.bsky.social · 23/06/2026

New study highlights #CERN’s socio-economic contributions as a global research hub 🌍 📸 CERN, Bioimaging and Axiom Space Find out more: home.cern/new-study-highlights-cerns-socio-economic-contributions-as-a-global-research-hub/

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CERN @cern.bsky.social · 19/06/2026

François Englert (1932 – 2026) It is with great sadness that we announce that Belgian theoretical physicist, François Englert, has passed away at the age of 93. Read more: home.cern/francois-eng...

François Englert during a visit to CERN in 2014 (Image: CERN)

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CERN @cern.bsky.social · 18/06/2026

The @lhcb.bsky.social discovers the final missing member of a doubly charmed particle family 💫 The new particle, composed of one strange quark and two charm quarks, completes a set of particles first theorised over half a century ago. Find out more: home.cern/lhcb-discove...

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CERN @cern.bsky.social · 18/06/2026

In these photos, we see the "Journée du Personnel",an open day for CERN staff, their families and friends, organised to mark the 25th anniversary. More than 3,000 people gathered for a day of games,sports competitions, films and music,alongside a special ceremony honouring members of the Laboratory.

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CERN @cern.bsky.social · 18/06/2026

#ThrowbackThursday to September 1979, when CERN celebrated its 25th anniversary 🎉 During the first 25 years (1954–1979), several groundbreaking accelerators were built #AtCERN which allowed to make discoveries that later helped establish the modern #StandardModel of particle physics.

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CERN @cern.bsky.social · 17/06/2026

Happy 50th anniversary SPS 🎉 #OnThisDay we celebrate the 50th anniversary since the first beam circulated in the Super Proton Synchrotron (SPS), which is today the second-largest machine in CERN’s accelerator complex Find out more: home.cern/science/accelerators/super-proton-synchrotron/

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CERN @cern.bsky.social · 16/06/2026

Arts at CERN and Pro Helvetia announce the artists selected for the 2026 Connect India residency 💫 Find out more: home.cern/arts-at-cern...

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CERN @cern.bsky.social · 15/06/2026

Final collisions, new horizons 💫 After 12 years in operation, a record amount of data and thousands of scientific results, the Large Hadron Collider is taking a break. It will be transformed into the #HiLumi LHC, an even more powerful machine. Find out more: home.cern/final-collis...

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